Invention Grant
US08270917B2 Current controlled biasing for current-steering based RF variable gain amplifiers
有权
基于电流导向的RF可变增益放大器的电流控制偏置
- Patent Title: Current controlled biasing for current-steering based RF variable gain amplifiers
- Patent Title (中): 基于电流导向的RF可变增益放大器的电流控制偏置
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Application No.: US12520513Application Date: 2007-12-20
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Publication No.: US08270917B2Publication Date: 2012-09-18
- Inventor: Sherif H. K. Embabi , Abdellatif Bellaouar , Michel J. G. J. P. Frechette
- Applicant: Sherif H. K. Embabi , Abdellatif Bellaouar , Michel J. G. J. P. Frechette
- Applicant Address: CA Calgary
- Assignee: Icera Canada ULC
- Current Assignee: Icera Canada ULC
- Current Assignee Address: CA Calgary
- International Application: PCT/CA2007/002329 WO 20071220
- International Announcement: WO2008/074149 WO 20080626
- Main IPC: H04B1/04
- IPC: H04B1/04

Abstract:
An adaptive current control circuit for reduced power consumption and minimized gain shift in a variable gain amplifier. An automatic gain control circuit provides gain control voltages in response to a gain control signal. The gain control voltages are used by the variable gain amplifier to set the gain of the output signal for wireless transmit operations. The adaptive current control circuit receives the same gain control voltages for reducing current to the variable gain amplifier during low gain operation, while providing higher currents during high gain operation. The current that is provided is a hybrid mix of proportional to absolute temperature (PTAT) current and complementary to absolute temperature (CTAT) current for minimizing temperature effects on the gain. The ratio of PTAT current and CTAT current is adjustable for specific temperature ranges to further minimize temperature effects on the gain.
Public/Granted literature
- US20100093291A1 CURRENT CONTROLLED BIASING FOR CURRENT-STEERING BASED RF VARIABLE GAIN AMPLIFIERS Public/Granted day:2010-04-15
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