QUIESCENT CURRENT CONTROL CIRCUIT FOR HIGH-POWER AMPLIFIERS

Title:

QUIESCENT CURRENT CONTROL CIRCUIT FOR HIGH-POWER AMPLIFIERS

Document Type and Number:

WIPO Patent Application WO2005027188

Kind Code:

A3

Abstract:

A control circuit for controlling a bias circuit coupled to an amplifier is disclosed. An exemplary bias control circuit comprises means for receiving a control voltage, and means for actively adjusting an equivalent resistance of the bias control circuit responsive to the control voltage, wherein the equivalent resistance is established between the first node and a reference voltage. In one embodiment, when the control voltage is increased, the equivalent resistance is gradually decreased and a current drawn by the bias control circuit is gradually increased, resulting in a quiescent current of the amplifier transistor being gradually increased.

Inventors:

YANG YOUNGOO (US)
CHOI KEVIN (US)
PARK BONG-SEOK (US)

Application Number:

PCT/US2004/023938

Publication Date:

June 02, 2005

Filing Date:

July 27, 2004

Export Citation:

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Assignee:

SKYWORKS SOLUTIONS INC (US)
YANG YOUNGOO (US)
CHOI KEVIN (US)
PARK BONG-SEOK (US)

International Classes:

G05F3/22; H03F1/30; (IPC1-7): G05F3/02

Foreign References:

US6617928B2	2003-09-09
US6437647B1	2002-08-20

Other References: