def test_loopcalc(): from numpy.testing import assert_almost_equal myAnalogPLL = AnalogPLL(4, 521.8e+06, Navg=55.22, prescaler=2, plltype=2) myAnalogPLL.loopcalc(1e6, 60.0, -107.8, 1e6, 0.7, 300) # Assert filter values for a specific design assert_almost_equal(myAnalogPLL.filter_vals['C1'], 4.2842e-10, 3) assert_almost_equal(myAnalogPLL.filter_vals['C2'], 3.31384e-11, 3) assert_almost_equal(myAnalogPLL.filter_vals['C3'], 3.31384e-12, 3) assert_almost_equal(myAnalogPLL.filter_vals['Icp'], 516.691e-6, 3) assert_almost_equal(myAnalogPLL.filter_vals['R1'], 1.3864303e3, 3) assert_almost_equal(myAnalogPLL.filter_vals['R2'], 1.28688908e3, 3)
def test_add_noise_sources(): from numpy.testing import assert_almost_equal import matplotlib.pyplot as plt myAnalogPLL = AnalogPLL(4, 521.8e+06, Navg=10, prescaler=2, plltype=2) myAnalogPLL.loopcalc(1e6, 60.0, -130.0, 1e6, 0.1, 300) myAnalogPLL.lti() pinput = [ Pnoise([1e3, 1e6, 1e9], [-140, -140, -140], label='input', fc=48e6) ] poutput = [ Pnoise([1e3, 1e6, 1e9], [-70, -120, -180], label='VCO', fc=480e6) ] fm = np.logspace(4, 8, 100) pn_total, pn_in_colored, pn_out_colored = \ myAnalogPLL.add_noise_sources(fm, pn_inputs=pinput, pn_outputs=poutput) assert_almost_equal(pn_total.interp1d(1e8), -160, 2) assert_almost_equal(pn_total.interp1d(1e4), -120, 2)
def test_lti(): from numpy.testing import assert_almost_equal import matplotlib.pyplot as plt # Create a PLL and obtain the lti system for order in [3, 4]: myAnalogPLL = AnalogPLL(order, 521.8e+06, Navg=10, prescaler=2, plltype=2) myAnalogPLL.loopcalc(1e6, 60.0, -107.8, 1e6, 0.7, 300) G, T, H = myAnalogPLL.lti() # The open loop transfer function G f = np.linspace(0.95e6, 1.05e6, num=100) w, mag, phase = G.bode(w=2 * k.pi * f) ix = np.max(np.where(mag >= 0)) assert_almost_equal(f[ix] / 1e6, 1, 1)