Oscillator circuit for receiving a wide frequency band signal

Details Oscillator circuit for receiving a wide frequency band signal Oscillator circuit for receiving a wide frequency band signal

1994-12-08

1996-01-23

Mis, David

Oscillators

Solid state active element oscillator

Transistors

331 8, 331 23, 331 36C, 331177V, 329326, 348735, 455262, H03B 512, H03D 300, H03L 7099

Patent

active

054867967

ABSTRACT:
An oscillator provided with an oscillation circuit provided with two oscillation transistors comprising a differential pair and a resonance circuit connected in common to the bases of the oscillation transistors. The bases of the oscillation transistors are short-circuited by a coil, a center tap coil is connected in parallel to the resonance circuit, and variable capacitive diodes in the resonance circuit are driven by a coil connected to a mixing circuit. Due to this, it is possible to prevent the occurrence of low frequency noise, possible to realize a completely balanced operation, possible to avoid the oscillation carrier flowing into the power source and ground, and possible to reduce the noise in a television picture.

REFERENCES:
Dekker, A.; "Universal Voltage-Controlled Oscillator With Low Phase Noise"; Electronics & Wireless World; vol. 93; No. 1617; Jul. 87; pp. 707-709; 331-177V.

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