Timing circuit

Details Timing circuit Timing circuit

1999-04-20

2001-11-06

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Phase shift by less than period of input

C327S158000, C327S265000, C327S273000, C327S286000

Reexamination Certificate

active

06313679

ABSTRACT:

This invention relates to a timing circuit as described in the preamble of claim
1
. The invention further relates to delay means for use in such a timing circuit. The invention further relates to a method for delaying a clock signal as described in the preamble of claim
5
. The invention further relates to a display device comprising such a timing circuit.
Timing circuits having an adjustable delay are known, and can be used in a lot of different devices. For example, a timing circuit can be used in LCD projection.
These known timing circuits with adjustable delay have as a disadvantage that they cannot delay very high frequencies and/or do not offer a delay range sufficient to compensate for the total delay (for example, in an analog path) and/or are rather expensive.
It is, inter alia, an object of the invention to obtain a timing circuit and a method for delaying a timing signal that overcomes the drawbacks of the prior art.
To this end a first aspect of the invention provides a timing circuit as will be described below in detail. A second aspect of the invention provides a method of delaying a timing signal which also will be described below in detail.
An advantage of a timing circuit and a method for delaying a timing signal according to the invention is that it is possible to obtain a large clock delay range. Further, the clock delay can be made frequency independent. The timing circuit according to the invention can delay a clock signal with a very high frequency (for example, 200 MHz).
Embodiments of the invention are defined in the dependent Claims.


REFERENCES:
patent: 3619699 (1971-11-01), Wheeler
patent: 3728635 (1973-04-01), Eisenberg
patent: 5237224 (1993-08-01), Delisle et al.
patent: 5506531 (1996-04-01), Jang et al.
patent: 5815043 (1998-09-01), Chow et al.

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