中文摘要：

针对无线局域网前端接收机2.5GHz的应用,提出了一种硅锗工艺低噪声差分放大器.采用差分级联放大器结构既能抑制输入端的共模噪声信号,又能因级联结构的高增益而抑制电路的噪声,确保电路的高性能;同时选用JAZZ 0.35μm 1P4M锗硅BiCMOS工艺来制作.该放大器能有效地提供了50!输入阻抗匹配且具备良好的温度特性.在频点2.5GHz时,放大器的最大小信号电压增益为29.1dB,噪声系数1.3dB,输入/输出回波损耗都优于-11dB,输入3阶交调点为-0.24dBm.在直流电源电压3V供应下,低噪声放大器消耗电流为3.7mA.仿真结果表明,与其他文献相比,该放大器有更高的电压增益和更低的噪声,可以更加有效地应用于无线局域网及相关频点领域.

英文摘要：

A differential lower noise amplifier （LNA） for wireless local network （WLAN） in front-end receiver is presented, which is fabricated with a JAZZ 0. 35 gm 1P4M SiGe BiCMOS process. It can not only reject the common-mode noise signal in input port and but also depress circuit noise for using cascade topology, and realize its high performance. The LNA provides effectively a 50 El input impedance matching and good temperature characteristic. At 2.5 GHz, the LNA exhibits a maximum small signal voltage gain of 29. 1 dB, noise figure of 1.3 dB, input/output return loss better than --11 dB, and input IIP3 of - 0. 24 dBm, respectively. The LNA consumes 3. 7 mA from a 3. 0V IX; supply. The simulation results show that, in comparison with the other LNAs, this LNA has higher voltage gain, lower noise and more efficaciously be utilized in WLAN and related fields.