Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular or pulse waveform width control
Reexamination Certificate
2006-08-17
2008-11-11
Cox, Cassandra (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Rectangular or pulse waveform width control
C327S172000
Reexamination Certificate
active
07449931
ABSTRACT:
There is disclosed a duty ratio adjustment for adjusting the duty ratio of an input clock signal. First and second one-shot pulse generation circuits respectively detect rising/tailing edges of an external input signal and output pulse signals of constant widths. Third and fourth one-shot pulse generation circuits respectively detect rising/tailing edges of an output signal from the delay circuit and output pulse signals. A selector circuit outputs the pulse signals that are output from the third and second one-shot pulse generation circuits as H edge/L edge generation clock signals, when the L width is broadened, and outputs the pulse signals that are output from the first and fourth one-shot pulse generation circuits as H edge/L edge generation clock signals, when the H width is broadened. A waveform synthesis circuit outputs a signal that changes to a high level between the timing during which the high edge generation signal is output from the selector circuit and the timing during which the low edge generation signal is output from the selector circuit, as an internal clock signal.
REFERENCES:
patent: 5359232 (1994-10-01), Eitrheim et al.
patent: 5583461 (1996-12-01), Lowe
patent: 5764091 (1998-06-01), Sumita et al.
patent: 6198322 (2001-03-01), Yoshimura
patent: 6339553 (2002-01-01), Kuge
patent: 6380778 (2002-04-01), Uehara et al.
patent: 6937485 (2005-08-01), Suzuki et al.
patent: 7019574 (2006-03-01), Schrodinger
patent: 10-144074 (1998-05-01), None
patent: 2001-307497 (2001-11-01), None
patent: 2004-206879 (2004-07-01), None
Cox Cassandra
Elpida Memory Inc.
Hayes & Soloway P.C.
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