Compact switched-capacitor FIR filter implementation

摘要

A system is provided to perform non-recursive signal processing using a sampled data technique and a parallel network of switched-capacitor filters. The input analog signal is sampled in a time sequence manner at regular time intervals to obtain analog-valued samples. These samples are collected into data blocks that are assembled into a set of data blocks. The successive data blocks belonging to a set of data blocks partially overlap with the first data block. The non-recursive signal processing is performed on all of the data blocks of the set substantially simultaneously, using the parallel network to produce a processed analog output signal. Each individual processing path of the parallel network processes a specific data block of the set of data blocks. The number of parallel processing paths is the same as one plus the degree of the polynomial representing the desired or overall input/output equation characterizing the non-recursive signal processing.

主权项

1. A method comprising:
decomposing a non-recursive signal processing task into a plurality of non-recursive signal processing sub-tasks, wherein the plurality of non-recursive signal processing sub-tasks comprises at least a first sub-task and a last sub-task; receiving an analog input signal, processing the analog input signal before inputting the analog input signal into the first sub-task; executing the sub-tasks in a sequential manner such that an output of a sub-task is input to a corresponding succeeding sub-task; accepting an output of the last sub-task as a non-recursively processed analog output signal; and obtaining a degree of a polynomial representing the non-recursive signal processing corresponding to the first sub-task.