Pulse or digital communications – Repeaters – Testing
Patent
1988-08-17
1992-01-14
Chin, Stephen
Pulse or digital communications
Repeaters
Testing
455245, 328168, H04L 2708
Patent
active
050816535
ABSTRACT:
An automatic gain control circuit for multilevel duobinary AM/PSK (amplitude modulation/phase shift keying) signals allows multilevel modulated signals to be received accurately. The circuit includes an amplifier that is controlled such that during a preamble section the amplifier has a gain associated with the level of the inputted signal. During a data section the amplifier is controlled to maintain a substantially constant gain. The invention may be used in the reception of AM/PSK modulated signals.
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IEEE 802.4, "Token Passing Bus Access Method and Physical Layer Specifications", Draft H--Aug. 1987, pp. 45-47, 80, 208-209, and 213-215.
Chin Stephen
NEC Corporation
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