Variable gain amplifier and high-frequency signal receiving...

Details Variable gain amplifier and high-frequency signal receiving... Variable gain amplifier and high-frequency signal receiving...

2011-05-13

2011-12-20

Nguyen, Khanh (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including plural stages cascaded

C330S278000, C330S284000

Reexamination Certificate

active

08081033

ABSTRACT:
A cascode amplification unit includes a plurality of cascode amplifiers connected in parallel. Each of the cascode amplifiers has two transistors. A cascode current source unit includes a plurality of cascode current sources connected in parallel. Each of the cascode current sources has two transistors. Both the output end of the cascode amplification unit and the output end of the cascode current source unit are connected to a load circuit. The control circuit turns on and off each cascode transistor of the cascode amplifier and each cascode transistor of the cascode current source so that an amount of current passing through the load circuit is constant.

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