Gallium arsenide differential amplifier with closed loop bias st

Details Gallium arsenide differential amplifier with closed loop bias st Gallium arsenide differential amplifier with closed loop bias st

1985-04-26

1986-10-07

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330258, 330261, 330277, H03F 316, H03F 345

Patent

active

046161899

ABSTRACT:
A gallium arsenide differential amplifier is compensated against temperature and process induced variations so as to provide phase and amplitude matched differential output signals centered about an internal GaAs reference voltage. Compensation of the amplifier is effected by one or more current sources which are adjustably responsive to the dynamic common mode level of the output signals. The resultant amplifier provides a high common mode rejection ratio and facilitates implementation of otherwise impracticable differential GaAs circuit topologies.

REFERENCES:
patent: 4371843 (1983-02-01), Fang et al.
patent: 4393315 (1983-07-01), Stickel et al.
patent: 4528515 (1985-07-01), Gross
patent: 4528516 (1985-07-01), Hill
Costlow, Terry, "GaAs Yields Denser RAM, Gate Arrays, and Hybrids Analog Chips", Elec. Design, Sep. 20, 1984, p. 61 only.

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