Differential receiver with high common-mode range

Details Differential receiver with high common-mode range Differential receiver with high common-mode range

1990-04-30

1991-08-27

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330253, 330258, H03F 345

Patent

active

050436740

ABSTRACT:
This describes a differential amplifier for producing an output current proportional to the differential input voltage regardless of the common-mode input voltage and comprises two identical voltage networks coupled between differential voltage inputs and to common differential current outputs and a common bias circuit. The described transmission line circuit operates as a transmission line receiver circuit with a high degree of common-mode rejection that will work in a high input signal voltage environment and in which both true and complement outputs can be developed such that their signal responses are additive and their common-mode responses subtractive. The circuit thus converts the input voltage to an input current while isolating the sensing circuit from common-mode input voltages which may be in excess of the breakdown voltage of the individual components of the circuit and the power supplies powering up the sensing circuit.

REFERENCES:
patent: 4223275 (1980-09-01), Brinker
patent: 4667165 (1987-05-01), De Weck
patent: 4698599 (1987-10-01), Hedman
patent: 4742309 (1988-05-01), Chu
patent: 4748420 (1988-05-01), Metz
patent: 4769617 (1988-09-01), Mizuide
patent: 4887047 (1989-12-01), Somerville
John K. Moriarty, Jr., "A Serial Bus Transceiver for the Automotive Environment", IEEE Journal of Solid-State Circuits, vol. 23, No. 1, Apr. 1988, pp. 450-457.

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