Delayed-pulse generator having means for stabilizing the chargin

Details Delayed-pulse generator having means for stabilizing the chargin Delayed-pulse generator having means for stabilizing the chargin

1994-03-10

1995-01-24

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Having specific delay in producing output waveform

323315, 327261, 327263, 327264, 327 77, H03K 5159, G05F 316

Patent

active

053845056

ABSTRACT:
A delayed-pulse generator formed by a combination of a comparator, a current-mirror circuit, a capacitor, a switching transistor and a constant-current source further has a transistor whose emitter and base are connected together and which is connected in parallel and in forward-direction with respect to the constant-current source. A charging current of a very small value can be set stably without being affected by the leakage current flowing in the switching transistor even in a high temperature operation. Thus, a pulse having a long delay time can be readily obtained. In addition, an erroneous operation caused by the leakage current flowing in the switching transistor can be effectively suppressed.

REFERENCES:
patent: 4503381 (1985-03-01), Bowers
patent: 4803381 (1989-02-01), Gornati et al.
patent: 5063342 (1991-11-01), Hughes et al.

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