Voltage controlled oscillator for upconverter/downconverter in d

Details Voltage controlled oscillator for upconverter/downconverter in d Voltage controlled oscillator for upconverter/downconverter in d

1996-09-24

2000-06-27

Mis, David

Oscillators

With frequency adjusting means

Step-frequency change

331 96, 331117R, 331117D, 331175, H03B 512, H03B 518

Patent

active

060811684

ABSTRACT:
A voltage controlled oscillator for upconverter/downconverter in a digital radio communication system has an improved phase noise characteristic and includes: a resonance unit wherein a variable capacitance component is parallel-connected to a series resonance circuit, the variable capacitance component having a capacitance inversely proportional to the level of a control voltage in a preset range and the series resonance circuit having a series resonance point corresponding to the level of a mode voltage, and an oscillating unit for oscillating at a frequency corresponding to a parallel resonance point determined by the resonance unit.

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