Low noise resistively matched amplifier

Details Low noise resistively matched amplifier Low noise resistively matched amplifier

1998-12-09

2000-08-08

Lee, Benny

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330254, H03F 345

Patent

active

061007587

ABSTRACT:
In a communication transceiver receiving a signal from a signal source defined by a source impedance between first and second nodes, an amplifier is provided having an input impedance matched to the source impedance. The amplifier includes a transconductance cell having first and second transistors connected to the first and second nodes, respectively. The first and second transistors of the transconductance cell receive the signal from the signal source and develop a modified version of the signal as an output current signal at first and second output terminals, respectively. A first impedance circuit, having a first impedance related to the input impedance, is connected between the second node and the first transistor. Similarly, a second impedance circuit, having a second impedance related to the input impedance, is connected between the first node and the second transistor.

REFERENCES:
patent: 4365206 (1982-12-01), Rehfeldt
patent: 4887047 (1989-12-01), Somerville
patent: 5877643 (1999-03-01), Drogi
patent: 5999049 (1999-12-01), Katakura

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