Power supply noise rejection technique for amplifiers

Details Power supply noise rejection technique for amplifiers Power supply noise rejection technique for amplifiers

1988-12-16

1990-03-27

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330149, H03F 126, H03F 345

Patent

active

049124277

ABSTRACT:
A circuit provides power supply noise cancellation by utilizing a correction capacitor coupled to a compensation input of the circuit. Power supply noise is introduced into an output of the circuit by inadvertently coupling an error voltage thru a capacitor to the output as a result of power supply voltage variation. A compensation charge is produced by the correction capacitor and a sub-amplifier of the circuit which, through charge transfer, cancels the error voltage at the output, thereby providing an output signal having substantially reduced power supply noise.

REFERENCES:
patent: 4562408 (1985-12-01), Nagai

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