Variable delay circuit with high resolution

Details Variable delay circuit with high resolution Variable delay circuit with high resolution

2005-06-21

2005-06-21

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Having specific delay in producing output waveform

C327S274000, C327S231000, C341S136000

Reexamination Certificate

active

06909316

ABSTRACT:
Variable delay circuits and methods for delaying a waveform by an adjustable time delay are disclosed herein. One such variable delay circuit comprises a delay range limitation circuit having a first differential input, a first differential output, and a second differential output. The first differential input is configured to receive an input waveform. The first differential output is configured to output the waveform with a maximum delay, and the second differential output is configured to output the waveform with a minimum delay. The variable delay circuit further comprises a delay mixing circuit having second and third differential inputs, first and second control inputs, and a third differential output. The second differential input is connected to the first differential output. The third differential input is connected to the second differential output. The first and second control inputs are configured to receive control voltages V1and V2, which are related to a selected time delay. The differential output is configured to output the waveform with the selected time delay.

REFERENCES:
patent: 5554945 (1996-09-01), Lee et al.
patent: 5748125 (1998-05-01), Cederbaum et al.
patent: 6369627 (2002-04-01), Tomita

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