发明名称 |
NOISE-CANCELING FOR DIFFERENTIAL AMPLIFIERS REQUIRING NO EXTERNAL MATCHING |
摘要 |
A differential Low Noise Amplifier (LNA) includes a first stage of resistive feedback amplifiers and second stage of complementary amplifiers, where the outputs of the first stage are coupled to the inputs of the second stage in a cross-coupled fashion. An inductive load, such as a transformer, combines signals output from the complementary amplifiers of the second stage. In one example, the LNA has an input impedance of less than 75 ohms, a noise factor of less than 2 dB, and a gain of more than 20 dB. Due to the low input impedance, the LNA is usable to amplify a signal received from a source having a similar low impedance without the use of an impedance matching network between the output of the source and the input of the LNA. |
申请公布号 |
WO2011140145(A3) |
申请公布日期 |
2012.01.12 |
申请号 |
WO2011US35067 |
申请日期 |
2011.05.03 |
申请人 |
QUALCOMM INCORPORATED;BEHERA, MANAS;MUTHALI, HARISH S.;BARNETT, KENNETH CHARLES |
发明人 |
BEHERA, MANAS;MUTHALI, HARISH S.;BARNETT, KENNETH CHARLES |
分类号 |
H03F3/189;H03F3/30 |
主分类号 |
H03F3/189 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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