Voltage-controlled oscillator

Details Voltage-controlled oscillator Voltage-controlled oscillator

2007-11-07

2009-10-13

Kinkead, Arnold (Department: 2817)

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

C331S016000, C331S017000, C331S066000, C331S069000, C331S070000, C331S1170FE, C331S1170FE, C331S1170FE, C331S175000, C331S167000, C331S17700V, C331S17700V

Reexamination Certificate

active

07602259

ABSTRACT:
A voltage-controlled oscillator has an oscillation frequency controlled through a voltage applied across ends of a variable-capacitance element. The voltage-controlled oscillator has a frequency control bias circuit which applies to a first end of the variable-capacitance element a voltage for frequency control according to a control voltage, a first current source which generates a first current according to the control voltage, a second current source which generates a second current according to temperature, independent of the control voltage, a converting resistor which converts a current, obtained by adding together the first and second currents, into a voltage, and a temperature compensation bias circuit which applies to the second end of the variable-capacitance element a voltage for temperature compensation according to the voltage produced by the converting resistor.

REFERENCES:
patent: 4096452 (1978-06-01), Waku et al.
patent: 4254382 (1981-03-01), Keller et al.
patent: 4607237 (1986-08-01), Aota
patent: 4751475 (1988-06-01), Kubo et al.
patent: 7049899 (2006-05-01), Kato
patent: 7177612 (2007-02-01), Nakamura et al.
patent: 2007/0126520 (2007-06-01), Matsuzuka
patent: 2005-102148 (2005-04-01), None
patent: 2007-158481 (2007-06-01), None

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