Multifunction floating FET circuit

Details Multifunction floating FET circuit Multifunction floating FET circuit

1985-10-31

1987-11-10

Miller, Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307571, 307529, 330301, 330275, 330277, H03K 3353, H03K 1760, G06G 700, H03F 304

Patent

active

047059672

ABSTRACT:
A transistor circuit is provided with a symmetrical floating configuration for attaining multifunction operation of a transistor having symmetrical source and drain characteristics, preferably a GaAs MESFET. The circuit includes a balun which may be configured as a transformer, a differential amplifier, or a magic-tee waveguide depending on the frequency of signals to be processed by the circuit. Balanced terminals of the balun may be directly or capacitively coupled to source and drain terminals of the transistor. Tuning circuits are employed for applying signals having different frequencies to the transistor and for extracting intermodulation products generated by the transistor in response to the signals at the different frequencies. With the direct connection between the balun and the transistor, alternating voltages may be impressed between the terminals of the transistor to alternate source and drain regions of the transistor. Functions of amplification, modulation, bipolar attenuation, four-quadrant multiplication and correlation, power frequency tripling, and mixing are obtainable. The transistor may be replaced with a pair of transistors connected in series or in antiparallel connection.

REFERENCES:
patent: 3727078 (1973-04-01), Wollesen
patent: 4518871 (1985-05-01), Toyoda et al.

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