Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Frequency or repetition rate conversion or control
Patent
1997-11-06
2000-08-22
Wells, Kenneth B.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Frequency or repetition rate conversion or control
327119, 327356, 377 47, H03B 1900
Patent
active
061078468
ABSTRACT:
A frequency multiplication circuit generates an output clock signal having a frequency obtained by multiplying an external clock signal inputted from outside by a predetermined number. The frequency multiplication circuit circuit includes an edge detection circuit for detecting a signal edge of the external clock signal and outputting an edge detection signal, an oscillation circuit for generating and outputting a reference clock signal having a predetermined frequency, and a clock generating circuit for taking in the edge detection signal outputted by the edge detection circuit and the reference clock signal outputted by the oscillation circuit, counting the number of clocks of the reference clock signal, directly outputting the reference clock signal before the number of clocks reaches a predetermined number, outputting no reference clock signal after the number of clocks has reached the predetermined number, and resetting a process of counting the number of reference clocks when inputting the edge detection circuit.
REFERENCES:
patent: 4423383 (1983-12-01), Svendsen
patent: 5122757 (1992-06-01), Weber et al.
patent: 5598446 (1997-01-01), Van Der Tuijn
patent: 5761255 (1998-06-01), Shi
patent: 5841823 (1998-11-01), Tuijn
OKI Electric Industry Co., Ltd.
Wells Kenneth B.
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