Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1988-03-10
1989-03-14
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330255, 330258, 330311, H03F 345
Patent
active
048127809
ABSTRACT:
A differential amplifier (230) with input differential dual gate FETs (232,234) with one pair of gates (235,237) tied together, with sources tied together, and with a current source (236,238) for each of the FETs and inputs at the current source terminals is disclosed. These amplifiers provide large CMRR at frequencies to a few GHz, and fabrication in gallium arsenide is disclosed. A push-pull single-ended output stage provides good power handling and VSWR.
REFERENCES:
Wyland, "FET Cascode Technique Optimizes Differential Amplifier Performances", Electronics, Jan. 18, 1971, pp. 81-84.
Heiting Leo N.
Hoel Carlton H.
Mullins James B.
Sharp Melvin
Texas Instruments Incorporated
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