Signal input circuit with constant operating power

Details Signal input circuit with constant operating power Signal input circuit with constant operating power

1985-12-02

1987-08-25

Miller, Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307256, 330284, 330145, 333 81R, H03G 318, H04B 128

Patent

active

046894985

ABSTRACT:
A signal input circuit composed of a control member, such as a PIN diode, for controllable attenuation of an input signal, and reactances for selection of the input signal, wherein the signal frequency current is regulated by the control member such that the operating power required by the input circuit remains constant to the greatest possible degree in spite of the regulation.

REFERENCES:
patent: 3652959 (1972-03-01), Denny
patent: 3663900 (1972-05-01), Peterson
patent: 3800229 (1974-03-01), Backwinkel et al.
patent: 3813602 (1974-05-01), Van Dijum et al.
patent: 3846724 (1974-11-01), Maier
patent: 4019160 (1977-04-01), Kam
patent: 4216445 (1980-08-01), Abajian
patent: 4224583 (1980-09-01), Larkin
patent: 4301432 (1981-11-01), Carlson et al.
patent: 4369414 (1983-01-01), Aoki et al.
patent: 4378536 (1983-03-01), Schwarzmann
patent: 4494076 (1985-01-01), Rinderle
Turner, "Broadband P-I-N Attenuator Has Wide Input Dynamic Range", Electronics, vol. 46, No. 16, Aug. 8th, 1974 (pp. 106-107).
"PIN-Diode Attenuator", Radio Communication, Aug. 1977, (p. 613).

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