Patent ID: 8645446
Filing Date: 2014-02-04
Classification: H03H

Abstract:
1. A multi-input Infinite Impulse Response (IIR) filter configured to receive a plurality of input values from an input signal and to generate a plurality of output values for an output signal at each iteration, comprising: a primary input combination unit configured to receive the plurality of input values and configured to generate a first combined input value and a second combined input value; a first adder coupled to receive the first combined input value, a first primary feedback value, and a first error feedback value, and configured to generate a first output value; a first quantizer coupled to receive the first output value and configured to generate a first quantized output value; a first delay unit coupled to receive the first quantized output value and configured to generate a first delayed quantized output value; a second adder coupled to receive the second combined input value a second primary feedback value, and a second error feedback value, and configured to generate a second output value; a second quantizer coupled to receive the second output value and configured to generate a second quantized output value; a second delay unit coupled to receive the second quantized output value and configured to generate a second delayed quantized output value; a multi-variable feedback unit coupled to receive the first delayed quantized output value and the second delayed quantized output value and configured to generate the first primary feedback value and the second primary feedback value; and a multi-variable error feedback unit coupled to receive the first output value, the first quantized output value, the second output value, and the second quantized output value and configured to generate the first error feedback value and the second error feedback value.