Transistor switching circuit with shortened response time

Details Transistor switching circuit with shortened response time Transistor switching circuit with shortened response time

1978-03-15

1979-12-25

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307246, 307294, H03K 5153

Patent

active

041807502

ABSTRACT:
The response time of an ordinary or differential transistor switching circuit controlled by the charging of a capacitor C.sub.1 is shortened by charging the capacitor through a constant current source comprising a transistor Q.sub.6, a resistor R.sub.1 and diodes D.sub.1, D.sub.2, to thereby provide a sharp transfer characteristic. The charging time may be even further shortened by increasing the constant current supply at an intermediate threshold level using a further ordinary or differential transistor switching circuit, thereby providing a break in the response characteristic and increasing its slope after the threshold point.

REFERENCES:
patent: 3649846 (1972-03-01), Frederiksen

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