Multi-range voltage controlled resonant circuit

Details Multi-range voltage controlled resonant circuit Multi-range voltage controlled resonant circuit

1994-08-01

1996-02-20

Pham, Chi H.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

4551972, 455262, 331177V, 334 78, H04B 116, H03B 500

Patent

active

054937159

ABSTRACT:
A voltage controlled tunable resonant circuit (100) has at least two resonant frequency ranges and reduced self modulation, and includes a resonant element (120), a variable reactance element (130), and a first voltage variable capacitor (VVC) (150). The variable reactance element (130) is coupled to the resonant element (120). The VVC (150) has two fixed capacitance values corresponding to two fixed capacitance bias voltage ranges, and is coupled to the resonant element (120) and the variable reactance element (130). The first VVC (150) is controlled by a first DC bias voltage (190) selected to be within one of the two fixed capacitance bias voltage ranges to establish one of the two resonant frequency ranges over which the voltage controlled tunable resonant circuit (100) is tuned by variation of the variable reactance element (130).

REFERENCES:
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patent: 5027429 (1991-06-01), Kojima
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patent: 5166646 (1992-11-01), Avanic et al.
patent: 5166857 (1992-11-01), Avanic et al.
patent: 5173835 (1992-12-01), Cornett et al.
patent: 5254958 (1993-10-01), Flach et al.
patent: 5319800 (1994-06-01), Erbora et al.

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