Apparatus and method for encoding signals

Details Apparatus and method for encoding signals Apparatus and method for encoding signals

2007-05-29

2007-05-29

Kim, Kevin (Department: 2611)

Pulse or digital communications

Pulse width modulation

C332S111000

Reexamination Certificate

active

09967807

ABSTRACT:
The present invention provides an apparatus and method for encoding and/or decoding signals. The encoding apparatus includes a variable impedance being coupled with an encoder. The variable impedance establishes a select voltage at the encoder. The encoder is further coupled with an input signal, wherein the encoder generates a modulated output as dictated by the select voltage. The decoding apparatus includes an integrator, a comparator and at least a first variable impedance. The integrator couples with the comparator, and is configured to receive an encoded signal and to generate an average DC voltage, such that the comparator receives the average DC voltage. The first variable impedance coupled with the comparator, and dictates a first limit such that the comparator receives the first limit. The comparator is configured to generate a decoded signal if the average DC voltage is at least equal to the first limit.

REFERENCES:
patent: 5132560 (1992-07-01), Kane
patent: 5134632 (1992-07-01), Fletcher et al.
patent: 5457489 (1995-10-01), Yamamoto et al.
patent: 6169765 (2001-01-01), Holcombe
patent: 6232796 (2001-05-01), Batra et al.

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