Differential amplifier with improved power supply rejection rati

Details Differential amplifier with improved power supply rejection rati Differential amplifier with improved power supply rejection rati

1985-06-18

1986-10-21

Wan, Gene

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330253, H03F 345

Patent

active

046188320

ABSTRACT:
An improved differential amplifier having improved immunity to signals on the power supply terminals (32,34) thereof. The low impedance path between the power supply terminals (32,34) of the amplifier and the second gain stage transistor (24) is removed and connected to a low noise reference. The source of the transistor (24) is provided as an output terminal (23) of the amplifier and can be optionally connected to any low noise reference. High impedance input current mirrors (47,55,63,67) are connected between the supply voltage rails (33,35) and the amplifier, thereby further reducing the amplifier's susceptibility to noise.

REFERENCES:
patent: 3851269 (1974-11-01), Szorc
patent: 4384350 (1983-05-01), Lee et al.

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