Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1995-08-21
1996-12-17
Wambach, Margaret Rose
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
327411, H03K 1762
Patent
active
055857558
ABSTRACT:
Audio bus receiver includes a pair of bipolar transistors each having a base coupled via a respective resistor to a respective bus receiver input terminal, each having an emitter that is diode coupled to a respective current source and each having a collector coupled via a respective load resistor to a source of reference potential. The emitters are coupled together via a gain control resistor and the collectors are coupled to an output terminal via a differential amplifier. Advantageously, the receiver avoids loading the bus under power-down conditions without requiring the use of stand-by power supplies. Additionally, high common mode rejection is achieved without need for precision matching of components and only a single supply voltage is required for operation.
REFERENCES:
patent: 4087643 (1978-05-01), Joslow et al.
patent: 4575759 (1986-03-01), Griepentrog et al.
patent: 4581645 (1986-04-01), Beyers, Jr.
patent: 4647973 (1987-03-01), Diess
Gurley Thomas D.
White Charles M.
Coalter Richard G.
Emanuel Peter M.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
Wambach Margaret Rose
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