Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1985-11-08
1987-12-15
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307529, 331117R, 331 43, 328 15, H03B 1900, H03B 500
Patent
active
047135565
ABSTRACT:
A frequency converter circuit for converting a high-frequency signal into an intermediate-frequency signal includes a local oscillation with a first transistor having first, second and third terminals. A first terminal of the first transistor is grounded through a first inductance and a first capacitor, while a second capacitor is inserted between the other two terminals. A resonance circuit including variable-capacity diodes and a second inductance is connected to the second terminal through a third capacitor. The frequency converter circuit further includes a mixer formed with a second transistor having a base thereof connected to the grounded terminal of the first transistor and an emitter thereof grounded through impedances offering substantially no resistance to the intermediate-frequency signal. The emitter of this second transistor is connected to a high-frequency input terminal supplied with a high-frequency signal. The intermediate frequency output is taken from the collector of the second transistor, preferably through a low-pass filter.
REFERENCES:
patent: 3305730 (1967-02-01), Parzen
patent: 3716730 (1973-02-01), Cerny, Jr.
patent: 3889210 (1975-06-01), Matsuura et al.
patent: 4160953 (1979-06-01), Matsuura et al.
patent: 4380827 (1983-04-01), Moon
patent: 4581768 (1986-04-01), Aoki et al.
patent: 4593255 (1986-06-01), Matsuura
patent: 4593257 (1986-06-01), Wignot
Shinkawa Keiro
Yamamoto Akio
Callahan Timothy P.
Hitachi , Ltd.
Miller Stanley D.
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