Semiconductor integrated circuit with pulse generation sections

Details Semiconductor integrated circuit with pulse generation sections Semiconductor integrated circuit with pulse generation sections

2006-12-15

2009-02-03

Luu, An T (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Clock or pulse waveform generating

C327S293000, C713S401000, C713S501000

Reexamination Certificate

active

07486126

ABSTRACT:
This invention provides a technique for enhancing an operating frequency and improving reliability in a system using at least level sense type sequence circuits as a plurality of sequence circuits. A microcomputer includes a clock generator configured as a clock supply source, functional modules operated in sync with a clock signal, level sense type sequence circuits which are contained in the functional modules and configured as clock supply destinations, a clock supply system which propagates the clock signal to the level sense type sequence circuits, etc. The clock supply system includes a clock wiring which propagates the clock signal outputted from the clock generator to ends thereof via a plurality of branches. At least pulse generators are disposed in the midstream of the clock wiring. Each of the pulse generators varies timing provided to change the falling edge of the clock signal, which defines an endpoint of an input operating period of each level sense type sequence circuit.

REFERENCES:
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patent: 2007/0097778 (2007-05-01), LaBerge
E. Takahashi, et al., “A post-silicon clock timing adjustment using genetic algorithms”, 2003 Symposium on VLSI Circuits Digest of Technical Papers, pp. 13-16.

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