Differential amplifier having improved balanced and linearity

Details Differential amplifier having improved balanced and linearity Differential amplifier having improved balanced and linearity

2005-08-09

2005-08-09

Shingleton, Michael B (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S254000, C330S096000, C330S277000, C327S359000

Reexamination Certificate

active

06927629

ABSTRACT:
The present invention provides a differential amplifier that improves balance and signal linearity. The inventive amplifier includes first and second differential converters. The first differential converter includes a first grounded emitter amplifier and a first grounded base amplifier. The second differential converter includes a second grounded emitter amplifier and a second grounded base amplifier. A first output signal of the differential amplifier is generated by coupling a first differential output signal of the first grounded emitter amplifier and a first differential output signal of the second grounded base amplifier. A second output signal of the differential amplifier is generated by coupling a second differential output signal of the first grounded base amplifier and a second differential output signal of the second grounded emitter amplifier.

REFERENCES:
patent: RE31545 (1984-03-01), Quinn
patent: 4945263 (1990-07-01), Estrada
patent: 5047728 (1991-09-01), Bayruns
patent: 5451914 (1995-09-01), Stengel
patent: 5291850 (1993-11-01), None
Smith et al. “Evolution of high-speed operational amplifier architectures” Solid-State Circuits, IEEE Journal of, vol.: 29 Issue 10, Oct. 1994 pp. 1166-1179.

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