Variable capacitance circuit

Details Variable capacitance circuit Variable capacitance circuit

1980-12-29

1983-08-16

Chin, Tommy P.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

455339, 455233, 333178, H04B 116

Patent

active

043995616

ABSTRACT:
A circuit having a variable input impedance which is controlled by application of a direct current input signal. The variable impedance circuit comprises a pair of capacitors coupled in series with a pair of diodes. The diodes are rendered conductive in response to the direct current control signal to substantially short the two capacitors in series with one another across the input terminals of the circuit. With no direct control signal being applied to the circuit the diodes are non-conductive which substantially disconnects the capacitors from appearing across the inputs of the circuit. Hence, the reactance component of the input impedance of the circuit is varied in response to the direct control signal.

REFERENCES:
patent: 2071902 (1937-02-01), Rust
patent: 2927997 (1960-03-01), Day
patent: 3528014 (1970-09-01), Albee
patent: 3541451 (1970-11-01), Lind
patent: 3636119 (1972-01-01), Balbes
patent: 3872387 (1975-03-01), Banach
patent: 4178551 (1979-12-01), Ogta

Affiliated with

Also associated with

Rating

Variable capacitance circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable capacitance circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable capacitance circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-818418