Silicon filtering buffer apparatus and the method of operation t

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G06G 702

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active

058927018

ABSTRACT:
A silicon active analog filtering buffer apparatus and its method of operation is disclosed to receive an input signal and generates a synthesized output signal. The apparatus comprises a pulse generator for receiving the input signal and producing a sequence of delayed signal pulses in response to the input signal. A control logic circuit is connected to the pulse generator for generating scheduling on/off operation control signals. An array of switched current sources includes a number of switch means each connected to the control logic for receiving a corresponding one of the generated scheduling on/off operation control signals for shaping pre-determined waveforms. An output stage providing an amplified 15 current output for shaping to form the synthesized output signal. No complex computational procedure is necessary for the creation of the output filtered signal. Power consumption, as well as device physical dimensional characteristics are both reduced. Improvements of filter characteristics are achieved.

REFERENCES:
patent: 5325318 (1994-06-01), Harris et al.
patent: 5521946 (1996-05-01), Main
patent: 5592340 (1997-01-01), Minuhin et al.
patent: 5650954 (1997-07-01), Minuhin

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