Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Patent
1999-03-19
2000-12-05
Lam, Tuan T.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
158161, H03K 513, H03L 706
Patent
active
061572314
ABSTRACT:
A system for stabilizing a delay through a signal path of an integrated circuit (IC) includes an oscillator for producing a periodic first reference signal, a delay circuit for delaying the first reference signal to produce a periodic second reference signal, and a loop controller for adjusting the magnitude of the IC's power supply so as to maintain a constant phase difference between the first and second reference signals. By adjusting the power supply magnitude, the loop controller also stabilizes signal path delays through logic circuits implemented in the IC. The oscillator is formed by a logic gate implemented in the IC and a passive delay line feeding the logic gate's output back to its input. The delay of the delay circuit is programmably adjustable to allow for adjustment of the signal path delay through the IC.
REFERENCES:
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patent: 5428309 (1995-06-01), Yamauchi et al.
patent: 5561692 (1996-10-01), Maitland et al.
patent: 5712883 (1998-01-01), Miller et al.
patent: 5914631 (1999-06-01), Soneda
patent: 5994938 (1999-11-01), Lesmeister
Bedell Daniel J.
Credence System Corporation
Lam Tuan T.
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