Invention Grant
US08437720B2 Variable-gain low noise amplifier for digital terrestrial applications
有权
用于数字地面应用的可变增益低噪声放大器
- Patent Title: Variable-gain low noise amplifier for digital terrestrial applications
- Patent Title (中): 用于数字地面应用的可变增益低噪声放大器
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Application No.: US12591440Application Date: 2009-11-19
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Publication No.: US08437720B2Publication Date: 2013-05-07
- Inventor: Lawrence M. Burns , Charles Brooks , Leonard Dauphinee
- Applicant: Lawrence M. Burns , Charles Brooks , Leonard Dauphinee
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: H04B1/06
- IPC: H04B1/06

Abstract:
An apparatus and method is disclosed for adjusting a gain of an amplifier assembly array. The amplifier assembly array includes a first stage to provide an amplified signal based upon an input signal. The first stage has a variable gain controlled in response to one or more gain control signals. An Automatic Gain Control (AGC) module generates the one or more gain control signals according to a ramp function in response to a power level of the amplified signal. The first stage may include a first low noise amplifier (LNA) to amplify the input signal to provide a first amplified input signal and a second LNA to amplify a second input signal to provide a second amplified signal. A switch selects between the amplified signal and the second amplified signal to provide the amplified signal. The amplifier assembly array may additionally include a second stage to provide a second amplified signal based upon the amplified signal. The second stage may include a third LNA to amplify one or more used channels of the amplified signal and a fourth LNA to amplify one or more unused channels of the amplified signal.
Public/Granted literature
- US20100073572A1 Variable-gain low noise amplifier for digital terrestrial applications Public/Granted day:2010-03-25
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