Micropower RC oscillator having hysteresis produced by switching

Details Micropower RC oscillator having hysteresis produced by switching Micropower RC oscillator having hysteresis produced by switching

1995-06-06

1996-10-29

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331143, H03K 3354

Patent

active

055700675

ABSTRACT:
An RC oscillator operates at very low current levels and manifests very brief internal component delays. The RC oscillator does not employ a conventional comparator and a conventional hysteresis circuit for changing reference voltages on the comparator. Instead, the RC oscillator includes a plurality of amplifiers. Hysteresis is achieved by changing the threshold voltage of one of the amplifiers. The threshold voltage is changed by switching different current values through the transistor so that the current for activating the amplifier is different from the current for deactivating the amplifier.

REFERENCES:
patent: 4513258 (1985-04-01), Jamiolkowski et al.
patent: 5418502 (1995-05-01), Ma et al.
P. Kakela, T. Rahkonen, J. Kostamovaara, "A Micropower RC Oscillator Chip for consuver ASIC Applications", .COPYRGT.1991, pp. 278-281. IEEE CH2964-5/91.

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