发明授权
US07948309B2 DC-offset cancelled programmable gain array for low-voltage wireless LAN system and method using the same
有权
用于低压无线局域网系统的直流偏移取消可编程增益阵列及其使用方法
- 专利标题： DC-offset cancelled programmable gain array for low-voltage wireless LAN system and method using the same
- 专利标题（中）： 用于低压无线局域网系统的直流偏移取消可编程增益阵列及其使用方法
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申请号： US12355658申请日： 2009-01-16
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公开(公告)号： US07948309B2公开(公告)日： 2011-05-24
- 发明人: Pui-In Mak , Seng-Pan U , Rui P. Martins
- 申请人： Pui-In Mak , Seng-Pan U , Rui P. Martins
- 申请人地址： unknown Taipu, Macau
- 专利权人： University of Macau
- 当前专利权人： University of Macau
- 当前专利权人地址： unknown Taipu, Macau
- 代理机构： Osha • Liang LLP
- 主分类号： H03F3/68
- IPC分类号： H03F3/68 ; H03F1/36
摘要：
An amplifier circuit includes a transconductance amplifier at an input side of the amplifier circuit, a transimpedance amplifier connected to an output of the transconductance amplifier, and a voltage amplifier connected to an output of the transimpedance amplifier. The transconductance amplifier and the transimpedance amplifier form a low-impedance node at an interface thereof. A feedback circuit is connected between an output of the voltage amplifier and the low-impedance node between the transconductance amplifier and the transimpedance amplifier. The transconductance amplifier, the transimpedance amplifier, and the voltage amplifier form a main amplifier stage. The feedback circuit senses an imbalance in an output of the main amplifier stage, whereby a correction signal is integrated and negatively fed back to the low-impedance node between the transconductance amplifier and the transimpedance amplifier.
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