Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1993-01-13
1994-04-26
Wambach, Margaret R.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307271, 328 15, 328 16, 328156, G06G 712
Patent
active
053069692
ABSTRACT:
A frequency mixer circuit having a differential pair composed of first and second field effect transistors (FET) whose performance characteristics, or transconductance parameters, are different from each other and whose sources are connected in common. The both FETs are driven with a constant current. An RF signal is applied to the gate of the first FET and a local oscillator signal is applied to the gate of the second FET. An output signal is taken out by converting the drain current of the first or second FET into a voltage. Such a drain current that has a square characteristic can be obtained in each of the first and second FETs, so that even if the local oscillator signal level is lower than that of several volts, the circuit can be operated without raising any problem.
REFERENCES:
patent: 4546275 (1985-10-01), Pena-Finol et al.
patent: 5151625 (1992-09-01), Zarabadi et al.
"Microwave Field-Effect Transistors-Theory, Design and Applications", by Raymond S. Pengelly; Electronic & Electrical Engineering Research Studies, Electronic Devices and Systems Research Studies Series, Research Studies Press; pp. 226-243 (and 4 additional cover/introductory pages).
"Nonlinear Microwave Circuits", FET Mixers, pp. 438-447.
NEC Corporation
Wambach Margaret R.
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