Oscillation circuit for improving C/N ratio

Details Oscillation circuit for improving C/N ratio Oscillation circuit for improving C/N ratio

1997-12-11

1999-08-31

Mis, David

Oscillators

Solid state active element oscillator

Transistors

331 36C, 331117FE, 331177V, H03B 512

Patent

active

059458844

ABSTRACT:
The object of this invention is an oscillation circuit that increases the Q of the parallel resonance circuit and increases the C/N (carrier-to-noise) ratio. The oscillation circuit contains two feedback capacitors connected between the base and emitter and between the emitter and collector of a transistor. Two inductors are also connected in series between the base and the collector of the transistor. One end of a resistor is connected to the emitter of the transistor and the other end is connected between the two inductors. The feedback capacitors and inductors constitute a parallel resonance circuit that may be tuned to create an equipotential across the ends of the resistor so that no current flows through it thus increasing both Q and the C/N ratio.

REFERENCES:
patent: 3909748 (1975-09-01), Yuan et al.
patent: 4593255 (1986-06-01), Matsuura
patent: 5565821 (1996-10-01), Murtojarvi
patent: 5576667 (1996-11-01), Goma

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