High-frequency amplifier

Details High-frequency amplifier High-frequency amplifier

1995-01-19

1996-07-02

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including combined diverse-type semiconductor device

330311, H03F 316

Patent

active

055326501

ABSTRACT:
A high-frequency amplifier has a first signal amplifier which includes a field effect transistor, and a constant-current circuit which is direct current connected, as well as cascade-connected, to the field effect transistor for maintaining a constant drain current of the field effect transistor. This constant-current circuit also acts as a second amplifier. The constant-current circuit may comprise a bipolar transistor or temperature compensation circuit. In this high-frequency amplifier, its gain and noise figure are stable against ambient temperature changes and power consumption efficiency is improved. This high-frequency amplifier is also suitable for mass production.

REFERENCES:
patent: 4174503 (1979-11-01), Merklinger et al.
patent: 5309429 (1994-05-01), Fukuda

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