def get_db(spec_file, intent, interp_method='spline', sim_env='TT'): # initialize transistor database from simulation data mos_db = MOSDBDiscrete([spec_file], interp_method=interp_method) # set process corners mos_db.env_list = [sim_env] # set layout parameters mos_db.set_dsn_params(intent=intent) return mos_db
def get_db(mos_type, dsn_specs): mos_specs = dsn_specs[mos_type] spec_file = mos_specs['spec_file'] interp_method = mos_specs.get('interp_method', 'spline') sim_env = mos_specs.get('sim_env', 'tt') layout_kwargs = mos_specs['layout_kwargs'] db = MOSDBDiscrete([spec_file], interp_method=interp_method) db.env_list = [sim_env] db.set_dsn_params(**layout_kwargs) return db
def query(vgs=None, vds=None, vbs=0.0, vstar=None, env_list=None): """Get interpolation function and plot/query.""" spec_list = [spec_file] if env_list is None: env_list = [env_default] # initialize transistor database from simulation data nch_db = MOSDBDiscrete(spec_list, interp_method=interp_method) # set process corners nch_db.env_list = env_list # set layout parameters nch_db.set_dsn_params(intent=intent) # returns a dictionary of smal-signal parameters return nch_db.query(vbs=vbs, vds=vds, vgs=vgs, vstar=vstar)
def plot_data(name='ibias', bounds=None, unit_val=None, unit_label=None): """Get interpolation function and plot/query.""" env_list = [env_default] vbs = 0.0 nvds = 41 nvgs = 81 spec_list = [spec_file] print('create transistor database') nch_db = MOSDBDiscrete(spec_list, interp_method=interp_method) nch_db.env_list = env_list nch_db.set_dsn_params(intent=intent) f = nch_db.get_function(name) vds_min, vds_max = f.get_input_range(1) vgs_min, vgs_max = f.get_input_range(2) if bounds is not None: if 'vgs' in bounds: v0, v1 = bounds['vgs'] if v0 is not None: vgs_min = max(vgs_min, v0) if v1 is not None: vgs_max = min(vgs_max, v1) if 'vds' in bounds: v0, v1 = bounds['vds'] if v0 is not None: vds_min = max(vds_min, v0) if v1 is not None: vds_max = min(vds_max, v1) # query values. vds_test = (vds_min + vds_max) / 2 vgs_test = (vgs_min + vgs_max) / 2 pprint.pprint(nch_db.query(vbs=vbs, vds=vds_test, vgs=vgs_test)) vbs_vec = [vbs] vds_vec = np.linspace(vds_min, vds_max, nvds, endpoint=True) vgs_vec = np.linspace(vgs_min, vgs_max, nvgs, endpoint=True) vbs_mat, vds_mat, vgs_mat = np.meshgrid(vbs_vec, vds_vec, vgs_vec, indexing='ij', copy=False) arg = np.stack((vbs_mat, vds_mat, vgs_mat), axis=-1) ans = f(arg) vds_mat = vds_mat.reshape((nvds, nvgs)) vgs_mat = vgs_mat.reshape((nvds, nvgs)) ans = ans.reshape((nvds, nvgs, len(env_list))) formatter = ticker.ScalarFormatter(useMathText=True) formatter.set_scientific(True) formatter.set_powerlimits((-2, 3)) if unit_label is not None: zlabel = '%s (%s)' % (name, unit_label) else: zlabel = name for idx, env in enumerate(env_list): fig = plt.figure(idx + 1) ax = fig.add_subplot(111, projection='3d') cur_val = ans[..., idx] if unit_val is not None: cur_val = cur_val / unit_val ax.plot_surface(vds_mat, vgs_mat, cur_val, rstride=1, cstride=1, linewidth=0, cmap=cm.cubehelix) ax.set_title('%s (corner=%s)' % (name, env)) ax.set_xlabel('Vds (V)') ax.set_ylabel('Vgs (V)') ax.set_zlabel(zlabel) ax.w_zaxis.set_major_formatter(formatter) plt.show()