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test_realizeNTF_ct.py
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test_realizeNTF_ct.py
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# -*- coding: utf-8 -*-
# test_realizeNTF_ct.py
# This module provides the tests for the realizeNTF_ct function.
# Copyright 2014 Giuseppe Venturini
# This file is part of python-deltasigma.
#
# python-deltasigma is a 1:1 Python replacement of Richard Schreier's
# MATLAB delta sigma toolbox (aka "delsigma"), upon which it is heavily based.
# The delta sigma toolbox is (c) 2009, Richard Schreier.
#
# python-deltasigma is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# LICENSE file for the licensing terms.
"""This module provides the test class for the realizeNTF_ct() function.
"""
import unittest
import numpy as np
import deltasigma as ds
from nose.tools import raises
class TestRealizeNTF_CT(unittest.TestCase):
"""Test class for realizeNTF_ct()"""
def setUp(self):
# FB NRTZ 0 delay tdac default
self.ntf = (np.array([1., 1.]), np.array([0., 0.]), 1)
self.ABCDc_ref1 = np.array(((0, 0, 1, -1),
(1, 0, 0, -1.5),
(0, 1, 0, 0)), dtype=np.float)
self.tdac2_ref1 = np.array(((-1, -1),
(0, 1)))
# FB NRTZ 0 delay tdac in short list form
self.ABCDc_ref2 = np.array(((0, 0, 1, -1),
(1, 0, 0, -1.5),
(0, 1, 0, 0)), dtype=np.float)
self.tdac2_ref2 = np.array(((-1, -1),
(0, 1)))
# FB multi-timing DAC
self.ntf3 = (np.array([1., 1., 1]), np.array([0., 0., 0]), 1)
self.tdac3 = [[1, 2], [1, 2], [[0.5, 1], [1, 1.5]], []]
self.ABCDc_ref3 = np.array(((0., 0., 0., 1., -1., 0., 0., 0.),
(1., 0., 0., 0., 0., -3., 0., 0.),
(0., 1., 0., 0., 0., 0., -6., -2.6667),
(0., 0., 1., 0., 0., 0., 0., 0.)))
self.tdac2_ref3 = np.array(((-1., -1.),
(1., 2.),
(1., 2.),
(0.5, 1.),
(1., 1.5)))
# test for FF
self.ABCDc_ref4 = np.array([[0., 0., 1., -1.],
[1., 0., 0., 0.],
[ 1.5, 1., 0., 0.]])
self.tdac2_ref4 = np.array([[-1., -1.], [ 0., 1.]])
# test for FF - NRZ DAC pulse delayed by .5
self.ABCDc_ref5 = np.array([[0., 0., 1., -1.],
[1., 0., 0., 0.],
[2., 1., 0., -0.8750]])
self.tdac2_ref5 = np.array([[-1., -1.], [ 0.5, 1.5]])
def test_realizeNTF_ct_1(self):
"""Test function for realizeNTF_ct() 1/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf, 'FB')
self.assertTrue(np.allclose(ABCDc, self.ABCDc_ref1, atol=1e-8,
rtol=1e-5))
self.assertTrue(np.allclose(tdac2, self.tdac2_ref1, atol=1e-8,
rtol=1e-5))
def test_realizeNTF_ct_2(self):
"""Test function for realizeNTF_ct() 2/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf, 'FB', tdac=[0, 1])
self.assertTrue(np.allclose(ABCDc, self.ABCDc_ref2, atol=1e-8,
rtol=1e-5))
self.assertTrue(np.allclose(tdac2, self.tdac2_ref2, atol=1e-8,
rtol=1e-5))
def test_realizeNTF_ct_3(self):
"""Test function for realizeNTF_ct() 3/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf3, 'FB', self.tdac3)
self.assertTrue(np.allclose(ABCDc, self.ABCDc_ref3, atol=1e-8,
rtol=1e-4))
self.assertTrue(np.allclose(tdac2, self.tdac2_ref3, atol=1e-8,
rtol=1e-4))
def test_realizeNTF_ct_4(self):
"""Test function for realizeNTF_ct() 4/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf, 'FF')
self.assertTrue(np.allclose(ABCDc, self.ABCDc_ref4, atol=1e-8,
rtol=1e-4))
self.assertTrue(np.allclose(tdac2, self.tdac2_ref4, atol=1e-8,
rtol=1e-4))
def test_realizeNTF_ct_5(self):
"""Test function for realizeNTF_ct() 5/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf, 'FF', tdac=[.5, 1.5])
self.assertTrue(np.allclose(ABCDc, self.ABCDc_ref5, atol=1e-8,
rtol=1e-4))
self.assertTrue(np.allclose(tdac2, self.tdac2_ref5, atol=1e-8,
rtol=1e-4))
@raises(ValueError)
def test_realizeNTF_ct_6(self):
"""Test function for realizeNTF_ct() 6/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf, 'DUMMY', tdac=[.5, 1.5])
@raises(ValueError)
def test_realizeNTF_ct_7(self):
"""Test function for realizeNTF_ct() 7/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf, 'FF', tdac=[.5, 1.5, 3.])
@raises(ValueError)
def test_realizeNTF_ct_8(self):
"""Test function for realizeNTF_ct() 8/15"""
tdac= [[-1, -1], [.5, 1.5], [.5, .8], [0.1, 2.]]
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf3, 'FB', tdac)
@raises(ValueError)
def test_realizeNTF_ct_9(self):
"""Test function for realizeNTF_ct() 9/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf3, 'FF', self.tdac3)
def test_realizeNTF_ct_10(self):
"""Test function for realizeNTF_ct() 10/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf, 'FB', method='NTF')
self.assertTrue(np.allclose(ABCDc, self.ABCDc_ref1, atol=1e-8,
rtol=1e-5))
self.assertTrue(np.allclose(tdac2, self.tdac2_ref1, atol=1e-8,
rtol=1e-5))
def test_realizeNTF_ct_11(self):
"""Test function for realizeNTF_ct() 11/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf, 'FB', tdac=[0, 1], method='NTF')
self.assertTrue(np.allclose(ABCDc, self.ABCDc_ref2, atol=1e-8,
rtol=1e-5))
self.assertTrue(np.allclose(tdac2, self.tdac2_ref2, atol=1e-8,
rtol=1e-5))
def test_realizeNTF_ct_12(self):
"""Test function for realizeNTF_ct() 12/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf3, 'FB', self.tdac3, method='NTF')
self.assertTrue(np.allclose(ABCDc, self.ABCDc_ref3, atol=1e-8,
rtol=1e-4))
self.assertTrue(np.allclose(tdac2, self.tdac2_ref3, atol=1e-8,
rtol=1e-4))
def test_realizeNTF_ct_13(self):
"""Test function for realizeNTF_ct() 13/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf, 'FF', method='NTF')
self.assertTrue(np.allclose(ABCDc, self.ABCDc_ref4, atol=1e-8,
rtol=1e-4))
self.assertTrue(np.allclose(tdac2, self.tdac2_ref4, atol=1e-8,
rtol=1e-4))
def test_realizeNTF_ct_14(self):
"""Test function for realizeNTF_ct() 14/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf, 'FF', tdac=[.5, 1.5],
method='NTF')
self.assertTrue(np.allclose(ABCDc, self.ABCDc_ref5, atol=1e-8,
rtol=1e-4))
self.assertTrue(np.allclose(tdac2, self.tdac2_ref5, atol=1e-8,
rtol=1e-4))
@raises(ValueError)
def test_realizeNTF_ct_15(self):
"""Test function for realizeNTF_ct() 15/15"""
ABCDc, tdac2 = ds.realizeNTF_ct(self.ntf3, 'FB', method='DUMMY')