Integrated circuit oscillator

Details Integrated circuit oscillator Integrated circuit oscillator

1985-11-15

1987-03-24

LaRoche, Eugene R.

Oscillators

Solid state active element oscillator

Transistors

331143, H03K 302

Patent

active

046528377

ABSTRACT:
An oscillator for an integrated circuit which includes a Schmitt trigger having an upper threshold voltage V.sub.H and a lower threshold voltage V.sub.L, a capacitor coupled between an input to the trigger and ground, a current generator coupled to the trigger input for charging the capacitor at a constant rate and a current generator coupled to the trigger input for discharging the capacitor at a constant rate. A charge switch in series with the charging current generator reversibly couples the charging current generator between a source of high voltage and the trigger input in response to a change in state of the trigger from a first state to a second state. A discharge switch in series with the discharging current generator reversibly couples the latter across the capacitor in response to a change in state of the trigger from the second state to the first state.

REFERENCES:
patent: 4151473 (1979-04-01), Coleman et al.
patent: 4513258 (1985-04-01), Jamiolkowski et al.

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