Composite differential direct-coupled instrumentation amplifier

Details Composite differential direct-coupled instrumentation amplifier Composite differential direct-coupled instrumentation amplifier

1992-01-06

1994-05-24

Pascal, Robert J.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330252, 330 84, 330124R, H03F 368

Patent

active

053152670

ABSTRACT:
A differential amplifier which utilizes a pair of wideband operational amplifiers as output stages for two differential output signals, a pair of high performance DC operational amplifiers to buffer input signals to the pair of wideband operational amplifiers used as output stages and reduce offset voltage error by the amount of the DC gain of the pair of high performance DC operational amplifiers, apparatus for biasing the pair of high performance DC operational amplifiers to provide exceptional DC characteristics and eliminate common mode response from those amplifiers, and apparatus for feeding forward high frequency AC input to the wideband operational amplifiers operating as the output stages without loading the common mode input impedance of the differential amplifier.

REFERENCES:
patent: 3757241 (1973-09-01), Kime et al.
patent: 4242741 (1980-12-01), Parrish
patent: 4595884 (1986-07-01), Miller, Jr.
patent: 4599574 (1986-07-01), Chambers
patent: 4694110 (1990-10-01), Horimai et al.
patent: 5075633 (1991-12-01), Bowers
patent: 5103122 (1992-04-01), O'Leary et al.
patent: 5150071 (1992-09-01), Bouzidi
patent: 5159286 (1992-10-01), Ito
Circuit Ideas (Electronic & Wireless World), Feb. 1986, p. 33.

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