Low noise multi-stage type amplifier

Details Low noise multi-stage type amplifier Low noise multi-stage type amplifier

H - Electricity

03

F

H03F 1/26 (2006.01) H03F 3/193 (2006.01) H03F 3/60 (2006.01)

Patent

CA 2043103

In a low-noise multistage amplifier of this invention, operation currents of amplifiers in respective stages (in particular, first- and final-stage amplifiers) are set so that an optimal signal source reflection coefficient ?opt and S parameters are almost not varied by manufacturing variations. The lengths of source stubs connected to FETs of the amplifiers in the respective stages are optimally set in units of stages so that characteristics of the amplifier do not change due to the manufacturing variations, and a sufficient gain can be obtained.

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