Hysteresis circuit with small hysteresis amplitude and oscillato

Details Hysteresis circuit with small hysteresis amplitude and oscillato Hysteresis circuit with small hysteresis amplitude and oscillato

1983-09-29

1985-11-05

LaRoche, Eugene R.

Oscillators

Solid state active element oscillator

Transistors

331143, 331177R, H03K 326

Patent

active

045516910

ABSTRACT:
A hysteresis circuit producing a relatively stable hysteresis output signal, which includes a power source, a reference potential source, a transistor, a constant current source, output means and means for detecting the collector current and for controlling the constant current source. The transistor is connected at its collector to the power source via the constant current source and at its emitter to the reference potential source. The constant current source supplies a constant current switchable between first and second levels. The output means is responsive to the first and second levels of current for deriving a bilevel hysteresis output signal dependent on the first and second levels of current. The detecting and controlling means detects the collector current of the transistor and controls the current source between the first and second levels of current in response to the collector current.

REFERENCES:
patent: 3803516 (1974-04-01), Wilcox
patent: 4161703 (1979-07-01), Nutz
patent: 4233575 (1980-11-01), Chapman et al.

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