Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1985-09-13
1987-01-27
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307571, 307296R, H03K 1756, H03K 17687
Patent
active
046396144
ABSTRACT:
An apparatus for selectively switching between either of two RF clock signal sources utilizes field effect transistors (FET's) as the switching elements. The FET's are driven at their respective base electrodes by complementary signals from open collector logic gates to provide signal source selection. In the event of loss of power to the RF switch, the energy from the RF signal passing through the previously selected switch path provides a positive (enabling) bias to the FET's in that path and a negative (disabling) bias to the FET's in the other path, thereby maintaining the selected path. The open collector logic gate circuits appear as open circuits when power is lost. During normal powered-on operation, the selection logic overrides the RF signal energy biasing circuits.
REFERENCES:
patent: 3280348 (1966-10-01), Jenson
patent: 3617770 (1971-11-01), Norton et al.
patent: 3662113 (1972-05-01), Von Recklinghausen
patent: 3908136 (1975-09-01), Desperques-Volmier
patent: 3965459 (1976-06-01), Spencer et al.
patent: 4382197 (1983-05-01), Kiyozuka
U.S. application Ser. No. 670,620, filed Nov. 13, 1984, for Philip Charles Basile.
Davis B. P.
Maginniss C. L.
Miller Stanley D.
RCA Corporation
Tripoli J. S.
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