Pulse or digital communications – Receivers – Automatic baseline or threshold adjustment
Patent
1997-10-01
2000-09-12
Pham, Chi H.
Pulse or digital communications
Receivers
Automatic baseline or threshold adjustment
375316, 375345, H04L 2510
Patent
active
061188298
ABSTRACT:
A method and apparatus are shown for automatically adjusting a response bandwidth and input sensitivity of a communications receiver responsive to a frequency of a received data signal. The response bandwidth is adjusted by switching a low pass filter into a receive path of the receiver when the received data signal is a low speed data signal and switching the low pass filter out of the receive path when the received data signal is a high speed data signal. The input sensitivity is adjusted by either changing a detection threshold of a comparator in the receive path or varying a gain of an input amplifier in the receive path. The high speed data signal is discerned when the low pass filter limits the response bandwidth of the receiver by a mode selection circuit which examines the duration of multiple pulses in a pulse train in the received data signal.
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Bayard Emmanuel
Francissen Vernon W.
Integration Associates Inc.
Pham Chi H.
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