Voltage controlled oscillator using a voltage tunable filter wit

Details Voltage controlled oscillator using a voltage tunable filter wit Voltage controlled oscillator using a voltage tunable filter wit

1982-05-28

1984-07-10

Grimm, Siegfried H.

Oscillators

Phase shift type

331177R, 332 23R, H03B 520, H03C 300

Patent

active

044595662

ABSTRACT:
A voltage controlled oscillator for producing an output signal having a frequency proportional to the magnitude of an input control signal includes a tunable filter circuit for simulating a resistance-inductance-capacitance (RLC) circuit with a resonant frequency approximately equal to the base or center frequency around which the voltage controlled oscillator is to operate. Through appropriate feedback means and multiple gain paths within the simulated RLC circuit, there is provided an output signal whose frequency is a function of the input control signal.

REFERENCES:
patent: 3800241 (1974-03-01), Ochs
patent: 3936773 (1976-02-01), Wilkinson
patent: 3978420 (1976-08-01), Lane
Operational Amplifier McGraw Hill Book Co., pp. 400-403, 1971.

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