Voltage controlled oscillator with controlled capacitance ratio

Details Voltage controlled oscillator with controlled capacitance ratio Voltage controlled oscillator with controlled capacitance ratio

1991-07-09

1992-11-03

Pascal, Robert J.

Oscillators

Solid state active element oscillator

Transistors

331177V, H03B 500

Patent

active

051609029

ABSTRACT:
A voltage controlled oscillator comprises a resonant circuit having at least a coil and a first variable capacitance diode, and resonating within predetermined variable frequency ranges; and an active circuit having an input, an output, and an active element connected between the input and the output, the input being connected to the resonant circuit in order to receive a resonant output therefrom. A variable capacitance ratio circuit, having a second variable capacitance diode and at least one capacitor, is connected in a positive feedback manner, between the input and the output of said active circuit means in order to oscillate the active element of the active circuit at a resonant frequency of the resonant circuit, between the input and the output of the active circuit. A variable controller is provided for changing a resonant frequency of the resonant circuit, to thereby apply a control voltage to the first and second variable capacitance diodes and to control a capacitance ratio between the at least one capacitor and the second variable capacitance diode in the variable capacitance ratio circuit, so that an oscillator frequency of the active element can be changed substantially linearly over a wide bandwidth of no less than one octachord in accordance with a variation in the control voltage, to thereby retain the amount of positive feedback at a predetermined level against the oscillator frequency of the active circuit.

REFERENCES:
patent: 3902132 (1975-08-01), Fried
patent: 4593255 (1986-06-01), Matsuura
patent: 4603304 (1986-07-01), Burns et al.
"8662A Synthesized Signal Generator", Hewlett Packard Service Manual, Jan. 1980.

Affiliated with

Also associated with

Rating

Voltage controlled oscillator with controlled capacitance ratio does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Voltage controlled oscillator with controlled capacitance ratio , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voltage controlled oscillator with controlled capacitance ratio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2052490