Dual bias control circuit

Details Dual bias control circuit Dual bias control circuit

2011-05-17

2011-05-17

Nguyen, Hieu P (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S133000

Reexamination Certificate

active

07944306

ABSTRACT:
The present invention relates to a bias control circuit and method for supplying a bias signal to at least one stage of an amplifier circuit, wherein a dual bias control is provided by generating a bias current and additionally using this bias current to derive a control signal for limiting a supply voltage of the at least one amplifier stage in response to the control signal. Thereby, a compression of the output signal of the amplifier stage, which results from the voltage limitation, can be realized in addition to the base current steering. This leads to a decrease in small signal gain and thus reduced output noise.

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Office Action in Japanese Patent Appln. 2007-535310 (Sep. 10, 2010).

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