Circuit generator of a constant electric signal which is indepen

Details Circuit generator of a constant electric signal which is indepen Circuit generator of a constant electric signal which is indepen

1998-04-20

2000-04-11

Dinh, Son T.

Miscellaneous active electrical nonlinear devices, circuits, and

External effect

Temperature

327513, H01L 3100

Patent

active

060492449

ABSTRACT:
A circuit for the generation of an electrical signal of constant duration comprises a capacitor, a constant current generator for charging the capacitor, and a voltage comparator to compare the voltage present at the terminals of the capacitor with a reference voltage. The voltage comparator supplies at an output a digital signal dependent upon the voltage across the capacitor. The constant current generator comprises a transistor biased with a voltage between gate and source obtained as the difference between the sum of two gate-source voltages of two transistors and a gate-source voltage of another transistor.

REFERENCES:
patent: 4119869 (1978-10-01), Hashimoto
patent: 4199693 (1980-04-01), Bennett
patent: 4642522 (1987-02-01), Suzuki et al.
patent: 4940910 (1990-07-01), Jiang
patent: 5434533 (1995-07-01), Furutani
patent: 5859560 (1999-01-01), Matthews
patent: 5880625 (1999-03-01), Park et al.
"Delayed Power-On Circuit with Soft Start", IBM Technical Disclosure Bulletin 35(7):197, Dec. 1992.

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