Programmable delay circuit

Details Programmable delay circuit Programmable delay circuit

2007-04-23

2008-11-04

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Having specific delay in producing output waveform

C327S231000, C327S258000, C327S259000, C327S261000, C327S284000, C327S269000

Reexamination Certificate

active

07446585

ABSTRACT:
A programmable delay circuit including a first inverter, a second inverter, a variable resistance unit, and a variable capacitance unit is provided. The first inverter receives a positive-phase received signal, and transmits an anti-phase output signal through an anti-phase output signal line. The second inverter receives an anti-phase received signal, and transmits a positive-phase output signal through a positive-phase output signal line. The variable resistance unit regulates an equivalent resistance between the anti-phase output signal line and the positive-phase output signal line according to M bits in a delay-controlled code. The variable capacitance unit regulates an equivalent capacitance between the anti-phase output signal line and the positive-phase output signal line according to N bits in the delay-controlled code.

REFERENCES:
patent: 6456137 (2002-09-01), Asao
Article titled “All Digital Pulsewidth Control Loop With Real Time Output” jointly authored by Huang et al., 17th VLSI Design/ CAD Symposium, Aug. 8-11, 2006.
Article titled “All Digital Pulsewidth Control Loop Using Two-Step Delay Element” jointly authored by Huang et al., The International Technical Conference on Circuits/ Systems, Computers and communicatins, Proceedings vol. 3, p. 685-p. 688, Jul. 10-13, 2006, Chiang Mai, Thailand.
Article titled “Differential Bidirectional Transceiver for On-chip Long Wires” jointly authored by Huang et al., The International Technical Conference on Circuits/ Systems, Computers and communicatins, Proceedings vol. 3, p. 773-p. 776, Jul. 10-13, 2006, Chiang Mai, Thailand.

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