Low noise amplifier with switch gain control

Details Low noise amplifier with switch gain control Low noise amplifier with switch gain control

2007-11-27

2007-11-27

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including plural stages cascaded

C330S253000

Reexamination Certificate

active

11223344

ABSTRACT:
This invention presents a low noise amplifier with switching gain control, comprising an amplifier having an impedance matching circuit a switch circuit, a signal amplifying branch circuit, a switch control circuit, a signal attenuating circuit and a current bias circuit, wherein the switch circuit controls signal amplifying or attenuating based on the high or low of an input signal level. This invention provides low noise, great dynamic range, increased system integration, and low power consumption. This invention is used for integrated circuit wireless communication system and RF preamplifiers for receiver.

REFERENCES:
patent: 6002860 (1999-12-01), Voinigescu et al.
patent: 6026286 (2000-02-01), Long
patent: 7027792 (2006-04-01), Luff et al.

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