Initial

IIR_filter.py

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+import numpy as np
+
+import matplotlib.pyplot as plt
+import fft
+
+class IIR_1_Order_LP(object):
+	"""docstring for fft_meas"""
+	def __init__(self, fs, fc=200):
+		self.fs = fs
+		self.fc = fc
+		self.dt = 1/self.fs
+		self.RC = 1 / (2*np.pi*self.fc)
+		self.alpha = self.dt / (self.RC + self.dt)
+
+		self.y = 0
+
+	def step(self, x):
+		self.y = self.y + self.alpha * (x - self.y)
+		return self.y
+
+
+
+