High-gain differencial amplifier circuit fabricated from field e

Details High-gain differencial amplifier circuit fabricated from field e High-gain differencial amplifier circuit fabricated from field e

1991-03-20

1991-12-03

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, 330277, H03F 345

Patent

active

050703064

ABSTRACT:
A differential amplifier circuit comprises a series combination of a p-channel type first input transistor and an n-channel type first load transistor coupled between a first constant current source and a discharging line, a series combination of a p-channel type second input transistor and an n-channel type second load transistor coupled between the first constant current source and the discharging line, and a controlling circuit coupled to gate electrodes of the first and second load transistors, and the controlling circuit increases the channel conductance of one of the first and second load transistors when the associated first or second input transistor decreases current passing therethrough in response to a non-inverted or inverted input signal, thereby improving the gain of the differential amplifier circuit.

REFERENCES:
patent: 4766394 (1988-08-01), Yukawa
patent: 4801891 (1989-01-01), Novosel et al.
patent: 4893090 (1990-01-01), Boudewijns
patent: 4904953 (1990-02-01), McCormack
patent: 5021745 (1991-06-01), Kondou et al.

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