DC offset cancellation apparatus

Details DC offset cancellation apparatus DC offset cancellation apparatus

2006-12-29

2008-10-28

Nguyen, Patricia (Department: 2817)

Amplifiers

With periodic switching input-output

C330S12400D, C330S051000

Reexamination Certificate

active

07443233

ABSTRACT:
A DC offset canceling apparatus includes a main amplifier, a replica amplifier, a switch, and a storage unit. The replica amplifier has substantially the same structure as the main amplifier, receives an input signal having the same sign as that of a signal input to the main amplifier, and has an output connected to main amplifier with an opposite sign. The switch switches a signal input to the replica amplifier in response to a control signal. The storage unit is connected to an input terminal of the replica amplifier to maintain a DC value for a predetermined period of time when the switch is open.

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English Abstract for Publication No. 2000-013159.
English Abstract for Publication No. 1020010047123.
English Abstract for Publication No. 1020010076615.
English Abstract for Publication No. 2003-283266.

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