Delay circuit with delay equal to percentage of input pulse...

Details Delay circuit with delay equal to percentage of input pulse... Delay circuit with delay equal to percentage of input pulse...

2011-04-05

2011-04-05

Luu, An T (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Rectangular or pulse waveform width control

C327S172000

Reexamination Certificate

active

07920003

ABSTRACT:
A delay circuit with a delay equal to the percentage of the input pulse width is described. In one embodiment, the ratio of the discharge current to the charge-up current of a timing capacitor is used to determine the percentage of the input pulse width used for the output delay. In a first timing phase, the input pulse width is stored as a voltage on the timing capacitor. In a second timing phase, the output is delayed by a percentage of the input pulse width. In a third timing phase, the circuit is restored to the trip point to remove sensitivity to process variation or applied conditions variation such as voltage or temperature (P-V-T variation), and be ready for the next timing cycle.

REFERENCES:
patent: 3883756 (1975-05-01), Dragon
patent: 6504409 (2003-01-01), Laletin
patent: 6664834 (2003-12-01), Nair et al.
patent: 6943604 (2005-09-01), Minzoni
patent: 7061304 (2006-06-01), Anand et al.
patent: 7330061 (2008-02-01), Boerstler et al.
patent: 7420400 (2008-09-01), Boerstler et al.

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