50% duty cycle relaxation oscillator with latch-up prevention ci

Details 50% duty cycle relaxation oscillator with latch-up prevention ci 50% duty cycle relaxation oscillator with latch-up prevention ci

1986-05-14

1987-07-07

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331143, H03K 3282, H03K 3295

Patent

active

046790063

ABSTRACT:
An oscillator circuit is disclosed in which a charging path is provided through a charging transistor and a discharging path is provided through a discharging transistor. Both the charging path and discharging path are directed through a first and second terminal for connection across a timing resistor to allow for reliable 50% duty cycle operation. A diode is provided between a voltage limit setting circuit and a second diode. The second diode is connected to the base of a buffer transistor. The buffer transistor turns the discharging transistor on and off. The two diodes provide a delay between the time in which the voltage limit setting circuitry changes the voltage limit and the switching of the discharging transistor to prevent latch-up.

REFERENCES:
patent: 3742382 (1973-06-01), Breitzmann et al.
patent: 4161703 (1979-07-01), Nutz

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