Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1974-07-17
1976-06-22
Libman, George H.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307235A, 325420, H04B 128
Patent
active
039654230
ABSTRACT:
A superheterodyne f.m. receiver having a manually tunable local oscillator which is electronically voltage tunable over a small range, and including a frequency discriminator for providing signal voltage and a.f.c. voltage in response to a received f.m. carrier, wherein is provided an electronic bipolar switch responsive to either positive or negative a.f.c. voltage of greater than a predetermined value for effecting grounding of a point of an a.f.c. circuit which applies a.f.c. voltage to the local oscillator, and which also includes an interchannel noise detector which also provides grounding signal for that same point of the a.f.c. circuit.
REFERENCES:
patent: 2691097 (1954-10-01), Atwood
patent: 3609554 (1971-09-01), Stoker
patent: 3764917 (1973-10-01), Rhee
patent: 3869674 (1975-03-01), Borbely
Corderman Sidney A.
Evans Ronald C.
Fish, Jr. Lawrence W.
Libman George H.
McIntosh Laboratory Inc.
Pollock Elliott I.
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