import matplotlib.pyplot as plt
import numpy as np
from deltasigma import lollipop
t = np.arange(1, 20)*1e-3
f = 20.
a = np.sin(2*np.pi*f*t)
lollipop(t, a)
plt.gcf().set_size_inches((8, 4))
plt.grid(True)
plt.show()