Current controlled Schmitt trigger oscillator

Details Current controlled Schmitt trigger oscillator Current controlled Schmitt trigger oscillator

1994-08-29

1995-10-10

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331143, 331177R, H03K 30231

Patent

active

054574323

ABSTRACT:
A current controlled oscillator includes an optocoupler driven by a control current; a diode bridge comprising four high speed diodes where the polarized input receives signals from an output transistor of the optocoupler; a resistor connected between the transistor output of the optocoupler and the polarized input of the diode bridge; an inverting Schmitt trigger having well defined low and high thresholds where the inverting input and an output are connected to a non-polarized input of the diode bridge; a timing resistor connected between the input and output of the Schmitt trigger; a timing capacitor connected between the negative input and ground of the Schmitt trigger; a pair of voltage references establishing the low and high thresholds of the inverting Schmitt trigger.

REFERENCES:
patent: 4646219 (1987-02-01), Rohl
patent: 5345196 (1994-09-01), Mahant-Shetti et al.

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