Oscillators – Solid state active element oscillator – Transistors
Patent
1995-11-21
1996-11-19
Mis, David
Oscillators
Solid state active element oscillator
Transistors
331 74, 331 77, 331 96, 331117R, 331177V, H03B 518
Patent
active
055766676
ABSTRACT:
An inexpensive voltage control type oscillator suitable for use with a mobile radio communication system within a predetermined frequency band range. The oscillator includes a resonance circuit and an oscillation stage formed on a printed wiring board and operating such that the oscillation frequency of the oscillation stage is varied within a predetermined frequency band range by varying the resonance frequency of a parallel resonance circuit included in the oscillation stage on the basis of a control voltage. The parallel circuit comprises a strip line connected in series with a bias resistor and a chip capacitor connected parallel to the strip line. The strip line has an inductance sufficiently larger than that of the resistor and the chip capacitor has a capacitance value so determined that the capacitor resonates at a predetermined frequency in cooperation with the strip line.
REFERENCES:
patent: 2817761 (1957-12-01), Hollmann
patent: 3596203 (1971-07-01), Sakamoto et al.
patent: 4990865 (1991-02-01), Martheli
patent: 5140286 (1992-08-01), Black et al.
patent: 5164686 (1992-11-01), Shiga
patent: 5185583 (1993-02-01), Ooi et al.
patent: 5373264 (1994-12-01), Higgins, Jr.
patent: 5446419 (1995-08-01), Miya et al.
patent: 5512862 (1996-04-01), Avanic et al.
Mis David
Murata Manufacturing Co. Ltd.
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