def run_sym(circuit, source, print_tf=False) -> Dict[str, sp.Expr]: """ :param circuit: ahkab circuit :param source: name of the source for analysis :param print_tf: print transfer function, poles, & zeros? :return: results for symbolic analysis """ if not isinstance(source, str): raise ValueError('Source name must be a string! e.g. \'V1\'') r, tf = ahkab.run(circuit, ahkab.new_symbolic(source=source, verbose=0))['symbolic'] tfs = tf['VOUT/' + str(source)] if print_tf: print("DC gain: {} dB".format( 20 * sp.log(tf['VOUT/' + str(source)]['gain0'], 10))) print("Transfer function:") sp.pprint(tfs['gain']) for i, z in enumerate(tfs['zeros']): print("Zero #{}:".format(i)) sp.pprint(z) for i, p in enumerate(tfs['poles']): print("Pole #{}:".format(i)) sp.pprint(p) return tfs
def setUp(self): ttn = ahkab.Circuit('Twin-T Notch Stopband filter') ttn.add_vsource('V1', 'in', ttn.gnd, dc_value=1) # first path ttn.add_capacitor('C1', 'in', 'n1', 2.2e-12) ttn.add_capacitor('C2', 'n1', 'out', 2.2e-12) ttn.add_resistor('R1', 'n1', ttn.gnd, 1e3) # second path ttn.add_resistor('R2', 'in', 'n2', 2e3) ttn.add_resistor('R3', 'n2', 'out', 2e3) ttn.add_capacitor('C3', 'n2', ttn.gnd, 2*2.2e-12) ttn.add_vcvs('E1', 'outb', ttn.gnd, 'out', ttn.gnd, 1.) sa = ahkab.new_symbolic(source=None) self.r = ahkab.run(ttn, sa)['symbolic'][0]
def setUp(self): ttn = ahkab.Circuit('Twin-T Notch Stopband filter') ttn.add_vsource('V1', 'in', ttn.gnd, dc_value=1) # first path ttn.add_capacitor('C1', 'in', 'n1', 2.2e-12) ttn.add_capacitor('C2', 'n1', 'out', 2.2e-12) ttn.add_resistor('R1', 'n1', ttn.gnd, 1e3) # second path ttn.add_resistor('R2', 'in', 'n2', 2e3) ttn.add_resistor('R3', 'n2', 'out', 2e3) ttn.add_capacitor('C3', 'n2', ttn.gnd, 2 * 2.2e-12) ttn.add_vcvs('E1', 'outb', ttn.gnd, 'out', ttn.gnd, 1.) sa = ahkab.new_symbolic(source=None) self.r = ahkab.run(ttn, sa)['symbolic'][0]
def _run_test(ref_run=False): MINNODES = 6 MAXNODES = 14 STEP = 1 times = [] x = list(range(max((2, MINNODES)), MAXNODES, STEP)) for circuit_nodes in x: # build the circuit mycir = ahkab.Circuit('R2R symbolic test with %d nodes' % circuit_nodes) n1 = '1' gnd = mycir.gnd mycir.add_vsource('VS', n1, gnd, dc_value=10e3) subs = {} for n in range(1, circuit_nodes): n1 = str(n) n2 = str(n + 1) mycir.add_resistor("R%dh1" % n, n1, n2, value=2.6e3) mycir.add_resistor("R%dh2" % n, n1, n2, value=2.6e3) mycir.add_resistor("R%dv" % n, n2, gnd, value=2.6e3) subs.update({"R%dh1" % n: 'R', "R%dh2" % n: 'R', "R%dv" % n: 'R'}) n1 = str(circuit_nodes) mycir.add_resistor("R%dve" % circuit_nodes, n1, gnd, value=2.6e3) subs.update({"R%dve" % circuit_nodes: 'R'}) # define analysis s = ahkab.new_symbolic(subs=subs) start = time.time() r = ahkab.run(mycir, s)['symbolic'][0] stop = time.time() times.append((stop - start)) print("Solving with %d nodes took %f s" % (circuit_nodes, times[-1])) # check the values too VS = r.as_symbol('VS') out_test = r['V' + str(circuit_nodes)] / VS out_th = 1. / (2**(circuit_nodes - 1)) assert .5 * abs(out_th - out_test) / (out_th + out_test) < 1e-3 x = numpy.array(x, dtype=numpy.int64) times = numpy.array(times, dtype=numpy.float64) if ref_run: numpy.savetxt(os.path.join(reference_path, 'r2r_symbolic_ref.csv'), numpy.concatenate((x.reshape( (-1, 1)), times.reshape((-1, 1))), axis=1), delimiter=',') save_boxid(os.path.join(reference_path, 'r2r_symbolic_ref.boxid')) return x, times
def _run_test(ref_run=False): MINNODES = 6 MAXNODES = 14 STEP = 1 times = [] x = list(range(max((2, MINNODES)), MAXNODES, STEP)) for circuit_nodes in x: # build the circuit mycir = ahkab.Circuit('R2R symbolic test with %d nodes' % circuit_nodes) n1 = '1' gnd = mycir.gnd mycir.add_vsource('VS', n1, gnd, dc_value=10e3) subs = {} for n in range(1, circuit_nodes): n1 = str(n) n2 = str(n + 1) mycir.add_resistor("R%dh1" % n, n1, n2, value=2.6e3) mycir.add_resistor("R%dh2" % n, n1, n2, value=2.6e3) mycir.add_resistor("R%dv" % n, n2, gnd, value=2.6e3) subs.update({"R%dh1" % n: 'R', "R%dh2" % n: 'R', "R%dv" % n: 'R'}) n1 = str(circuit_nodes) mycir.add_resistor("R%dve" % circuit_nodes, n1, gnd, value=2.6e3) subs.update({"R%dve" % circuit_nodes: 'R'}) # define analysis s = ahkab.new_symbolic(subs=subs) start = time.time() r = ahkab.run(mycir, s)['symbolic'][0] stop = time.time() times.append((stop - start)) print("Solving with %d nodes took %f s" % (circuit_nodes, times[-1])) # check the values too VS = r.as_symbol('VS') out_test = r['V' + str(circuit_nodes)] / VS out_th = 1./(2**(circuit_nodes - 1)) assert .5*abs(out_th - out_test)/(out_th + out_test) < 1e-3 x = numpy.array(x, dtype=numpy.int64) times = numpy.array(times, dtype=numpy.float64) if ref_run: numpy.savetxt(os.path.join(reference_path, 'r2r_symbolic_ref.csv'), numpy.concatenate((x.reshape((-1, 1)), times.reshape((-1, 1))), axis=1), delimiter=',') save_boxid(os.path.join(reference_path, 'r2r_symbolic_ref.boxid')) return x, times
def test(): """Test CCCS API""" # The circuit is: #test for transresitances #va 1 2 type=vdc vdc=.1 vac=1 #r1 1 0 .5k #r2 2 0 .5k #h1 3 4 va 5000 #r3 3 0 1k #r4 4 5 1k #l1 5 0 10u #c1 5 0 10u #.op #.ac start=50k stop=5e5 nsteps=1000 #.symbolic #.plot ac |v(5)| mycircuit = circuit.Circuit(title="Test CCVS API", filename=None) gnd = mycircuit.get_ground_node() mycircuit.add_resistor(part_id="R1", n1="1", n2=gnd, value=500) mycircuit.add_resistor(part_id="R2", n1="2", n2=gnd, value=500) mycircuit.add_vsource("VA", n1="1", n2='2', dc_value=0.1, ac_value=1.) mycircuit.add_ccvs('H1', n1='3', n2='4', source_id='VA', value=5000) mycircuit.add_resistor(part_id="R3", n1="3", n2=gnd, value=1e3) mycircuit.add_resistor(part_id="R4", n1="4", n2="5", value=1e3) mycircuit.add_inductor(part_id="L1", n1="5", n2=gnd, value=10e-6) mycircuit.add_capacitor(part_id="C1", n1="5", n2=gnd, value=10e-6) print(mycircuit) op_analysis = ahkab.new_op(outfile='hvsource_api', verbose=6) symb_analysis = ahkab.new_symbolic(outfile='hvsource_api', verbose=6) ac_analysis = ahkab.new_ac(outfile='hvsource_api', start=7957.747, stop=79577.471, points=1000, verbose=6) testbench = testing.APITest('hvsource', mycircuit, [op_analysis, symb_analysis, ac_analysis], skip_on_travis=False, er=1e-3, ea=1e-5) testbench.setUp() testbench.test() if not cli: testbench.tearDown()
def test(): """Test CCCS API""" # The circuit is: #test for transresitances #va 1 2 type=vdc vdc=.1 vac=1 #r1 1 0 .5k #r2 2 0 .5k #h1 3 4 va 5000 #r3 3 0 1k #r4 4 5 1k #l1 5 0 10u #c1 5 0 10u #.op #.ac start=50k stop=5e5 nsteps=1000 #.symbolic #.plot ac |v(5)| mycircuit = circuit.Circuit(title="Test CCVS API", filename=None) gnd = mycircuit.get_ground_node() mycircuit.add_resistor(part_id="R1", n1="1", n2=gnd, value=500) mycircuit.add_resistor(part_id="R2", n1="2", n2=gnd, value=500) mycircuit.add_vsource("VA", n1="1", n2='2', dc_value=0.1, ac_value=1.) mycircuit.add_ccvs('H1', n1='3', n2='4', source_id='VA', value=5000) mycircuit.add_resistor(part_id="R3", n1="3", n2=gnd, value=1e3) mycircuit.add_resistor(part_id="R4", n1="4", n2="5", value=1e3) mycircuit.add_inductor(part_id="L1", n1="5", n2=gnd, value=10e-6) mycircuit.add_capacitor(part_id="C1", n1="5", n2=gnd, value=10e-6) print(mycircuit) op_analysis = ahkab.new_op(outfile='hvsource_api', verbose=6) symb_analysis = ahkab.new_symbolic(outfile='hvsource_api', verbose=6) ac_analysis = ahkab.new_ac(outfile='hvsource_api', start=50e3, stop=500e3, points=1000, verbose=6) testbench = testing.APITest('hvsource', mycircuit, [op_analysis, symb_analysis, ac_analysis], skip_on_travis=False, er=1e-3, ea=1e-5) testbench.setUp() testbench.test() if not cli: testbench.tearDown()
def test(): """Test CCCS API""" # The circuit is: # test for transconductors # va 1 2 type=vdc vdc=.1 # r1 1 0 .5k # r2 2 0 .5k # f1 3 4 va 5 # r3 3 0 1k # r4 4 0 1k # .op # .symbolic mycircuit = circuit.Circuit(title="Test CCCS API", filename=None) gnd = mycircuit.get_ground_node() mycircuit.add_resistor(part_id="R1", n1="1", n2=gnd, value=500) mycircuit.add_resistor(part_id="R2", n1="2", n2=gnd, value=500) mycircuit.add_cccs('F1', n1='3', n2='4', source_id='VA', value=5) mycircuit.add_resistor(part_id="R3", n1="3", n2=gnd, value=1e3) mycircuit.add_resistor(part_id="R4", n1="4", n2=gnd, value=1e3) mycircuit.add_vsource("VA", n1="1", n2='2', dc_value=0.1) print(mycircuit) op_analysis = ahkab.new_op(outfile='fisource_api', verbose=6) symb_analysis = ahkab.new_symbolic(outfile='fisource_api', verbose=6) testbench = testing.APITest('fisource', mycircuit, [op_analysis, symb_analysis], skip_on_travis=False, er=1e-3, ea=1e-5) testbench.setUp() testbench.test() if not cli: testbench.tearDown()
def test(): """Test CCCS API""" # The circuit is: # test for transconductors # va 1 2 type=vdc vdc=.1 # r1 1 0 .5k # r2 2 0 .5k # f1 3 4 va 5 # r3 3 0 1k # r4 4 0 1k # .op # .symbolic mycircuit = circuit.Circuit(title="Test CCCS API", filename=None) gnd = mycircuit.get_ground_node() mycircuit.add_resistor(part_id="R1", n1="1", n2=gnd, value=500) mycircuit.add_resistor(part_id="R2", n1="2", n2=gnd, value=500) mycircuit.add_cccs("F1", n1="3", n2="4", source_id="VA", value=5) mycircuit.add_resistor(part_id="R3", n1="3", n2=gnd, value=1e3) mycircuit.add_resistor(part_id="R4", n1="4", n2=gnd, value=1e3) mycircuit.add_vsource("VA", n1="1", n2="2", dc_value=0.1) print(mycircuit) op_analysis = ahkab.new_op(outfile="fisource_api", verbose=6) symb_analysis = ahkab.new_symbolic(outfile="fisource_api", verbose=6) testbench = testing.APITest( "fisource", mycircuit, [op_analysis, symb_analysis], skip_on_travis=False, er=1e-3, ea=1e-5 ) testbench.setUp() testbench.test() if not cli: testbench.tearDown()
def test(): """Test VCCS (API)""" # The circuit is: # test for transconductors # va 1 2 type=idc idc=1m # r1 1 0 .5k # r2 2 0 .5k # g1 3 4 2 1 1e-3 # r3 3 0 1k # r4 4 0 1k # .op # .symbolic mycircuit = circuit.Circuit(title="Test CCCS API", filename=None) gnd = mycircuit.get_ground_node() mycircuit.add_resistor(part_id="R1", n1="1", n2=gnd, value=500) mycircuit.add_resistor(part_id="R2", n1="2", n2=gnd, value=500) mycircuit.add_vccs('G1', n1='3', n2='4', sn1='2', sn2='1', value=1e-3) mycircuit.add_resistor(part_id="R3", n1="3", n2=gnd, value=1e3) mycircuit.add_resistor(part_id="R4", n1="4", n2=gnd, value=1e3) mycircuit.add_isource("IA", n1="1", n2='2', dc_value=1e-3) print(mycircuit) op_analysis = ahkab.new_op(outfile='gisource_api', verbose=6) symb_analysis = ahkab.new_symbolic(outfile='gisource_api', verbose=6) testbench = testing.APITest('gisource', mycircuit, [op_analysis, symb_analysis], skip_on_travis=False, er=1e-3, ea=1e-5) testbench.setUp() testbench.test() if not cli: testbench.tearDown()
def test(): """Test SVF Biquad""" mycircuit = Circuit(title="state variable filter") gnd = mycircuit.get_ground_node() buildsvf(mycircuit) mycircuit.add_vsource(part_id="V1", n1="in", n2=gnd, dc_value=5, ac_value=1) if cli: printing.print_circuit(mycircuit) subs = symbolic.parse_substitutions(('E2=E1', 'E3=E1', 'R01=R00', 'R02=R00', 'R11=R00', 'R10=R00', 'C11=C10', 'Rf2=Rf1', 'Rin=R00')) symbolic_sim = ahkab.new_symbolic(ac_enable=True, subs=subs, outfile='svf_biquad') ac_sim = ahkab.new_ac(start=0.1, stop=100e6, points=1000, x0=None, outfile='svf_biquad') testbench = testing.APITest('svf_biquad', mycircuit, [symbolic_sim, ac_sim], skip_on_travis=True, er=1e-3, ea=1e-5) testbench.setUp() testbench.test() if cli: r = ahkab.run(mycircuit, [symbolic_sim, ac_sim]) E = r['symbolic'][0].as_symbol('E1') out_hp = sympy.limit(r['symbolic'][0]['VU1o'], E, sympy.oo, '+') out_bp = sympy.limit(r['symbolic'][0]['VU2o'], E, sympy.oo, '+') out_lp = sympy.limit(r['symbolic'][0]['VU3o'], E, sympy.oo, '+') out_hp = out_hp.simplify() out_bp = out_bp.simplify() out_lp = out_lp.simplify() print("VU1o =", out_hp) print("VU2o =", out_bp) print("VU3o =", out_lp) w = sympy.Symbol('w') out_hp = out_hp.subs({r['symbolic'][0].as_symbol('RF1'):10e3, r['symbolic'][0].as_symbol('C10'):15e-9, r['symbolic'][0].as_symbol('V1'):1, r['symbolic'][0].as_symbol('s'):1j*w, }) out_bp = out_bp.subs({r['symbolic'][0].as_symbol('RF1'):10e3, r['symbolic'][0].as_symbol('C10'):15e-9, r['symbolic'][0].as_symbol('V1'):1, r['symbolic'][0].as_symbol('s'):1j*w, }) out_lp = out_lp.subs({r['symbolic'][0].as_symbol('RF1'):10e3, r['symbolic'][0].as_symbol('C10'):15e-9, r['symbolic'][0].as_symbol('V1'):1, r['symbolic'][0].as_symbol('s'):1j*w, }) out_lp = sympy.lambdify((w,), out_lp, modules='numpy') out_bp = sympy.lambdify((w,), out_bp, modules='numpy') out_hp = sympy.lambdify((w,), out_hp, modules='numpy') ws = r['ac']['w'][::30] fig = plt.figure() plt.title(mycircuit.title) plt.subplot(211) plt.hold(True) plt.semilogx(r['ac']['w']/2./np.pi, 20*np.log10(np.abs(r['ac']['VU1o'])), label="HP output (AC)") plt.semilogx(r['ac']['w']/2./np.pi, 20*np.log10(np.abs(r['ac']['VU2o'])), label="BP output (AC)") plt.semilogx(r['ac']['w']/2./np.pi, 20*np.log10(np.abs(r['ac']['VU3o'])), label="LP output (AC)") plt.semilogx(ws/2./np.pi, 20*np.log10(np.abs(out_hp(ws))), 'v', label="HP output (SYMB)") plt.semilogx(ws/2./np.pi, 20*np.log10(np.abs(out_bp(ws))), 'v', label="BP output (SYMB)") plt.semilogx(ws/2./np.pi, 20*np.log10(np.abs(out_lp(ws))), 'v', label="LP output (SYMB)") plt.hold(False) plt.grid(True) plt.legend() plt.ylabel('Magnitude [dB]') plt.xlabel('Frequency [Hz]') plt.subplot(212) plt.hold(True) plt.semilogx(r['ac']['w']/2./np.pi, np.angle(r['ac']['VU1o']), label="HP output (AC)") plt.semilogx(r['ac']['w']/2./np.pi, np.angle(r['ac']['VU2o']), label="BP output (AC)") plt.semilogx(r['ac']['w']/2./np.pi, np.angle(r['ac']['VU3o']), label="LP output (AC)") plt.semilogx(ws/2./np.pi, np.angle(out_hp(ws)), 'v', label="HP output (SYMB)") plt.semilogx(ws/2./np.pi, np.angle(out_bp(ws)), 'v', label="BP output (SYMB)") plt.semilogx(ws/2./np.pi, np.angle(out_lp(ws)), 'v', label="LP output (SYMB)") plt.legend() plt.hold(False) plt.grid(True) #plt.ylim([0,1.2]) plt.ylabel('Phase [rad]') plt.xlabel('Frequency [Hz]') fig.savefig('ac_plot.png') else: testbench.tearDown()
av = svf.add_vsource ao = lambda name, p, n: svf.add_vcvs("E" + name[1:], name + "o", gnd, p, n, 1e6) ao("u1", "u1p", "u1o") ar("R1", "in", "nR2", 10e3) ar("R2", "nR2", "u1p", 10e3) ac("C1", "u1o", "nR2", 1e-9) ac("C2", "u1p", gnd, 1e-9) av("V1", "in", gnd, 2.5, 1.0) buildsk(mycircuit) print(mycircuit) symbolic_sim = ahkab.new_symbolic(ac_enable=True, source='V1') ac_sim = ahkab.new_ac(start=10, stop=100e6, points=1000, x0=None) try: r = pickle.load(open("results-sallenkey.pk")) except: ahkab.queue(ac_sim, symbolic_sim) r = ahkab.run(mycircuit) pickle.dump(r, open("results-sallenkey.pk", "wb")) print r['symbolic'][0] print "Symbolic transfer functions:" printing.print_symbolic_transfer_functions(r['symbolic'][1]) # substitute the actual values to the symbols and plot
av = circuit.add_vsource # circuit.add_model("diode", "aDiodeModel", {"name": "aDiodeElement"}) # circuit.add_diode("D1", "da", "dc", "aDiodeModel") av("Vin", "in", gnd, 2.5, 1.0) ac("Cin", "in", gnd, 100e-3) al("L1", "in", "s1", 47e-6) ac("C1", "s1", "da", 10e-6) al("L2", "da", gnd, 47e-6) ac("C2", "dc", gnd, 100e-3) #circuit.add_inductor_coupling("K1", "L1", "L2", 0.99) buildsepic(mycircuit) print(mycircuit) symbolic_sim = ahkab.new_symbolic() try: r = pickle.load(open("results-sepic.pk")) except: r = ahkab.run(mycircuit, (symbolic_sim,)) pickle.dump(r, open("results-sepic.pk", "wb")) print mycircuit print r['symbolic'][0] tf = r['symbolic'][0]['I[L1]']/r['symbolic'][0]['Vin'] tf = ahkabHelpers.reduceTF(tf, mycircuit) import compensators
def test(): """Test SVF Biquad""" mycircuit = Circuit(title="state variable filter") gnd = mycircuit.get_ground_node() buildsvf(mycircuit) mycircuit.add_vsource(part_id="V1", n1="in", n2=gnd, dc_value=5, ac_value=1) if cli: print(mycircuit) subs = {'E2':'E1', 'E3':'E1', 'R01':'R00', 'R02':'R00', 'R11':'R00', 'R10':'R00', 'C11':'C10', 'Rf2':'Rf1', 'Rin':'R00'} symbolic_sim = ahkab.new_symbolic(ac_enable=True, subs=subs, outfile='svf_biquad') ac_sim = ahkab.new_ac(start=0.1, stop=100e6, points=1000, x0=None, outfile='svf_biquad') testbench = testing.APITest('svf_biquad', mycircuit, [symbolic_sim, ac_sim], skip_on_travis=True, er=1e-3, ea=1e-5) testbench.setUp() testbench.test() if cli: r = ahkab.run(mycircuit, [symbolic_sim, ac_sim]) E = r['symbolic'][0].as_symbol('E1') out_hp = sympy.limit(r['symbolic'][0]['VU1o'], E, sympy.oo, '+') out_bp = sympy.limit(r['symbolic'][0]['VU2o'], E, sympy.oo, '+') out_lp = sympy.limit(r['symbolic'][0]['VU3o'], E, sympy.oo, '+') out_hp = out_hp.simplify() out_bp = out_bp.simplify() out_lp = out_lp.simplify() print("VU1o =", out_hp) print("VU2o =", out_bp) print("VU3o =", out_lp) w = sympy.Symbol('w') out_hp = out_hp.subs({r['symbolic'][0].as_symbol('RF1'):10e3, r['symbolic'][0].as_symbol('C10'):15e-9, r['symbolic'][0].as_symbol('V1'):1, r['symbolic'][0].as_symbol('s'):1j*w, }) out_bp = out_bp.subs({r['symbolic'][0].as_symbol('RF1'):10e3, r['symbolic'][0].as_symbol('C10'):15e-9, r['symbolic'][0].as_symbol('V1'):1, r['symbolic'][0].as_symbol('s'):1j*w, }) out_lp = out_lp.subs({r['symbolic'][0].as_symbol('RF1'):10e3, r['symbolic'][0].as_symbol('C10'):15e-9, r['symbolic'][0].as_symbol('V1'):1, r['symbolic'][0].as_symbol('s'):1j*w, }) out_lp = sympy.lambdify((w,), out_lp) out_bp = sympy.lambdify((w,), out_bp) out_hp = sympy.lambdify((w,), out_hp) ws = r['ac']['w'][::30] fig = plt.figure() plt.title(mycircuit.title) plt.subplot(211) plt.hold(True) plt.semilogx(r['ac']['w']/2./np.pi, 20*np.log10(np.abs(r['ac']['VU1o'])), label="HP output (AC)") plt.semilogx(r['ac']['w']/2./np.pi, 20*np.log10(np.abs(r['ac']['VU2o'])), label="BP output (AC)") plt.semilogx(r['ac']['w']/2./np.pi, 20*np.log10(np.abs(r['ac']['VU3o'])), label="LP output (AC)") plt.semilogx(ws/2./np.pi, 20*np.log10(np.abs(out_hp(ws))), 'v', label="HP output (SYMB)") plt.semilogx(ws/2./np.pi, 20*np.log10(np.abs(out_bp(ws))), 'v', label="BP output (SYMB)") plt.semilogx(ws/2./np.pi, 20*np.log10(np.abs(out_lp(ws))), 'v', label="LP output (SYMB)") plt.hold(False) plt.grid(True) plt.legend() plt.ylabel('Magnitude [dB]') plt.xlabel('Frequency [Hz]') plt.subplot(212) plt.hold(True) plt.semilogx(r['ac']['w']/2./np.pi, np.angle(r['ac']['VU1o']), label="HP output (AC)") plt.semilogx(r['ac']['w']/2./np.pi, np.angle(r['ac']['VU2o']), label="BP output (AC)") plt.semilogx(r['ac']['w']/2./np.pi, np.angle(r['ac']['VU3o']), label="LP output (AC)") plt.semilogx(ws/2./np.pi, np.angle(out_hp(ws)), 'v', label="HP output (SYMB)") plt.semilogx(ws/2./np.pi, np.angle(out_bp(ws)), 'v', label="BP output (SYMB)") plt.semilogx(ws/2./np.pi, np.angle(out_lp(ws)), 'v', label="LP output (SYMB)") plt.legend() plt.hold(False) plt.grid(True) #plt.ylim([0,1.2]) plt.ylabel('Phase [rad]') plt.xlabel('Frequency [Hz]') fig.savefig('ac_plot.png') else: testbench.tearDown()
# circuit.add_model("diode", "aDiodeModel", {"name": "aDiodeElement"}) # circuit.add_diode("D1", "da", "dc", "aDiodeModel") av("Vin", "in", gnd, 2.5, 1.0) ac("Cin", "in", gnd, 100e-3) al("L1", "in", "s1", 47e-6) ac("C1", "s1", "da", 10e-6) al("L2", "da", gnd, 47e-6) ac("C2", "dc", gnd, 100e-3) #circuit.add_inductor_coupling("K1", "L1", "L2", 0.99) buildsepic(mycircuit) print(mycircuit) symbolic_sim = ahkab.new_symbolic() try: r = pickle.load(open("results-sepic.pk")) except: r = ahkab.run(mycircuit, (symbolic_sim, )) pickle.dump(r, open("results-sepic.pk", "wb")) print mycircuit print r['symbolic'][0] tf = r['symbolic'][0]['I[L1]'] / r['symbolic'][0]['Vin'] tf = ahkabHelpers.reduceTF(tf, mycircuit) import compensators
ac = svf.add_capacitor al = svf.add_inductor av = svf.add_vsource ao = lambda name, p, n: svf.add_vcvs("E"+name[1:], name+"o", gnd, p, n, 1e6) ao("u1", "u1p", "u1o") ar("R1", "in", "nR2", 10e3) ar("R2", "nR2", "u1p", 10e3) ac("C1", "u1o", "nR2", 1e-9) ac("C2", "u1p", gnd, 1e-9) av("V1", "in", gnd, 2.5, 1.0) buildsk(mycircuit) print(mycircuit) symbolic_sim = ahkab.new_symbolic(ac_enable=True, source='V1') ac_sim = ahkab.new_ac(start=10, stop=100e6, points=1000, x0=None) try: r = pickle.load(open("results-sallenkey.pk")) except: ahkab.queue(ac_sim, symbolic_sim) r = ahkab.run(mycircuit) pickle.dump(r, open("results-sallenkey.pk", "wb")) print r['symbolic'][0] print "Symbolic transfer functions:" printing.print_symbolic_transfer_functions(r['symbolic'][1]) # substitute the actual values to the symbols and plot
ao("E3", gnd, "U3n") buildsvf(mycircuit) mycircuit.add_vsource("V1", n1="in", n2=gnd, dc_value=5, ac_value=1) print(mycircuit) ac_sim = new_ac(start=0.1, stop=100e6, points=1000, x0=None) try: r = pickle.load(open("results-ttb.pk")) except: subs = symbolic.parse_substitutions(('R2=R1', 'R3=R1', 'C2=C1', 'E2=E1', 'E3=E1', "R4=R1", "R5=R1", "R6=R1")) symbolic_sim = ahkab.new_symbolic(ac_enable=True, source=None, subs=subs) ahkab.queue(symbolic_sim) r = ahkab.run(mycircuit) pickle.dump(r, open("results-ttb.pk", "wb")) ahkab.queue(ac_sim) r.update(ahkab.run(mycircuit)) # TU1o is bandpass output tf = r['symbolic'][0]['VU1o']/r['symbolic'][0].as_symbol('V1') locals().update(ahkabHelpers.getMapping(tf)) tf = sympy.limit(tf, E1, sympy.oo, '+') tf = ahkabHelpers.reduceTF(tf, mycircuit)