Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Clock or pulse waveform generating
Patent
1997-03-03
1999-07-27
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Clock or pulse waveform generating
327293, 327294, 327147, 327149, 327150, 327158, 327159, H03K 5159, H03L 706
Patent
active
059296828
ABSTRACT:
The present invention is a clock generator circuit using semiconductor integrated circuits and which has an input logic circuit to which an external clock signal is supplied; a delaying element chain in which a plurality of delay elements connected to the input logic circuit are serially connected together; a plurality of delay element selectors connected to each of the plurality of delay elements, respectively; a loop closing circuit connected to the delay element connected to a specific delay element selector which to a state indicating a selected status and to the input logic circuit, for forming a closed loop between the delay element chain and the input logic circuit; and an external output connected to the input logic circuit.
REFERENCES:
patent: 4789996 (1988-12-01), Butcher
patent: 5295164 (1994-03-01), Yamamura
patent: 5428309 (1995-06-01), Yamauchi et al.
patent: 5477196 (1995-12-01), Yamauchi et al.
patent: 5491673 (1996-02-01), Okayasu
Kazuya Ioki
Nishihara Michinori
Callahan Timothy P.
International Business Machines Corp.
Luu An T.
McConnell Daniel E.
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