Low power comsumption, low noise and high power gain...

Details Low power comsumption, low noise and high power gain... Low power comsumption, low noise and high power gain...

2008-02-27

2009-08-25

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including distributed parameter-type coupling

C330S054000, C330S295000

Reexamination Certificate

active

07579913

ABSTRACT:
Provided is a distributed amplifier in communication systems, including: an input transmission line; an output transmission line; an input impedance match and an output impedance match, for providing termination of the input transmission line and the output transmission line, respectively and for preventing signal reflection in the input transmission line and the output transmission line, respectively; multi-stage Gm cells with common mode feedback, the input transmission line being coupled to the output transmission line by the transconductance of the Gm cells; and an input gate bias circuit, for providing bias for the multi-stage Gm cells. In at least one of the Gm cells, one inverter performs V/I conversion while other inverters provide negative resistance to control common mode of output voltage and to enhance DC gain of the Gm cell. Due to common mode feedback, no output gate bias is needed.

REFERENCES:
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patent: 7414477 (2008-08-01), Joodaki
patent: 2001/0047505 (2001-11-01), Mattisson

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