Semiconductor timer

Details Semiconductor timer Semiconductor timer

1983-12-29

1986-04-22

Heyman, John S.

Electrical transmission or interconnection systems

With nonswitching means responsive to external nonelectrical...

Temperature responsive

307227, 307608, 307228, 307246, H03K 17296, H03K 17687

Patent

active

045844941

ABSTRACT:
A semiconductor timer has a first MOS capacitor, a charge circuit for charging the first MOS capacitor, and a discharge circuit for discharging the first MOS capacitor. At least one of the charge and discharge circuits includes a transistor connected to the first MOS capacitor in series, and a second MOS capacitor connected to the gate of the transistor. The second MOS capacitor receives clock pulses and intermittently turns on the transistor in response to the clock pulses to gradually charge or discharge the first MOS capacitor.

REFERENCES:
patent: 3150271 (1964-09-01), Robertson
patent: 3158757 (1964-11-01), Rywak
patent: 3569842 (1971-03-01), Schroyer
patent: 3893036 (1975-07-01), Cavoretto et al.
patent: 4503345 (1985-03-01), Yamamura

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