CMOS technology based broadband bidirectional RF amplifier
A bidirectional radio frequency and forward amplifier technology, applied in high frequency amplifiers, improved amplifiers to reduce noise impact, etc., can solve problems such as low linearity of single-pole double-throw switches, reduce LNA output power, limit circuit output power, etc., to achieve Effect of high isolation, elimination of noise figure and output power deterioration, and improvement of output power
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[0027] The present invention will be further described below in conjunction with accompanying drawing:
[0028] like figure 2 , image 3 , Figure 4 and Figure 5 As shown, the broadband bidirectional radio frequency amplifier based on CMOS technology described in the first embodiment includes a forward amplifier broadband LNA and a reverse amplifier broadband PA. Both the LNA and the PA adopt a common-source configuration circuit topology with RC negative feedback, and the LNA The RF input end of the LNA is connected with the RF output end of the PA, and the RF output end of the LNA is connected with the RF input end of the PA.
[0029] The forward amplifier broadband LNA includes a MOS tube M1 as a radio frequency amplifier tube, L B_R is the gate inductance, L S_R is the source negative feedback inductance, R 2_R and C 2_R It constitutes RC negative feedback to expand the bandwidth of the circuit, and also includes MOS tube M2 and MOS tube M3 to form switches respec...
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