发明公开
- 专利标题： HIGHLY LINEAR VARIABLE GAIN AMPLIFIER
- 专利标题（中）： 高的线性可变增益放大器
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申请号： EP05725392.4申请日： 2005-03-10
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公开(公告)号： EP1735907A2公开(公告)日： 2006-12-27
- 发明人: PARK, Joonbae , LEE, Seung-Wook , LEE, Jeong-Woo , LEE, Kyeongho
- 申请人： GCT Semiconductor, Inc.
- 申请人地址： 2121 Ringwood Avenue San Jose, CA 95131 US
- 专利权人： GCT Semiconductor, Inc.
- 当前专利权人： GCT Semiconductor, Inc.
- 当前专利权人地址： 2121 Ringwood Avenue San Jose, CA 95131 US
- 代理机构： McKechnie, Neil Henry
- 优先权： US551788P 20040311; US66546 20050228
- 国际公布： WO2005086957 20050922
- 主分类号： H03F3/45
- IPC分类号： H03F3/45
摘要：
A variable-gain amplifier circuit uses a pair of single-ended operational amplifiers (100, 110) to amplify complementary portions of a differential input signal (IN, INB). By using two single-ended amplifiers (100, 110) instead of a single differential amplifier, linearity is significantly improved. In addition, common mode feedback circuitry is eliminated along with harmonic distortion and other forms of noise which tend to negative affect the quality of the signal output from the circuit.
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