Wide frequency range current-controlled oscillator

Details Wide frequency range current-controlled oscillator Wide frequency range current-controlled oscillator

1979-04-30

1980-11-11

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

332 9T, H03K 326

Patent

active

042335752

ABSTRACT:
A wide frequency range current-controlled oscillator (CCO) provides a digital output signal that is frequency controllable by an input control current. The CCO includes a differential voltage comparator coupled to a timing capacitor for controlling charging and discharging currents applied to the timing capacitor. The charging and discharging currents are dependent on the input control current. The magnitude of the discharging current may be varied to control the duty cycle of the digital output signal.

REFERENCES:
patent: 3659224 (1972-04-01), Ball
patent: 3904988 (1975-09-01), Hsiao
patent: 3924202 (1975-12-01), Craft
patent: 3946330 (1976-03-01), Takahashi
patent: 3995232 (1976-11-01), Laugesen
patent: 4023122 (1977-05-01), Oura
patent: 4035744 (1977-07-01), Fukaya et al.
patent: 4095194 (1978-06-01), Hoehn et al.
Allen et al., "A Wide Range Voltage-Controlled Oscillator", IEEE Transactions on Instrumentation and Measurement, vol. IM--24, No. 3, Sep. 1975, pp. 255-261.
"Signetics Analog Data Manual" by Signetics Corporation, 1977, p. 832.

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