Pulse or digital communications – Repeaters – Testing
Patent
1987-08-31
1989-05-23
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
375 76, 307360, H04L 2534
Patent
active
048336920
ABSTRACT:
Method and apparatus are disclosed providing selective amplification of signals whereby signals exceeding a threshold voltage are amplified while signals below the threshold voltage are attenuated. The invention is preferably employed in a receiver of signals on an ISDN and reduces errors in the first data bit following framing bits. Furthermore, noise components in the received signals are attenuated. An operational amplifier (28) has an amplification determined by the ratio of a feedback resistance (30) to an input resistance. The input resistance consists of a first resistor (26), and a second resistor (24), which can be selectively placed in series with the first resistor. A pair of series-connected diode pairs (16, 18, 20, 22) are connected in parallel with the second resistor. One pair of series-connected diodes oriented oppositely to the other pair. The forward-biased saturation voltage of the series-connected pairs of diodes determine the threshold voltage of the non-linear amplifier.
REFERENCES:
patent: 3778722 (1973-12-01), Stein
patent: 4007382 (1977-02-01), Warberg
patent: 4023046 (1977-05-01), Renirie
patent: 4280221 (1981-07-01), Chun et al.
patent: 4581725 (1986-04-01), Pilarcik, Jr.
patent: 4584690 (1986-04-01), Cafiero et al.
patent: 4679209 (1987-07-01), Hogeboon et al.
patent: 4697275 (1981-09-01), Lave
Forth Leslie
Lively Wallace
Advanced Micro Devices , Inc.
Chin Stephen
Griffin Robert L.
Levy Mark
Salomon Kenneth B.
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