Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Clock or pulse waveform generating
Reexamination Certificate
2007-11-19
2010-06-29
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Clock or pulse waveform generating
C327S291000, C327S293000, C327S294000
Reexamination Certificate
active
07746143
ABSTRACT:
An object is to provide a clock generating circuit that can suppress variation of an oscillation frequency from the clock generating circuit, which is due to a change in the output voltage according to a discharging characteristic of the battery, and effectively utilize the remaining power of the battery. A structure includes an output voltage detecting circuit for detecting an output voltage from a battery; a frequency-division number determining circuit for determining the number of frequency-division by a value of the output voltage detected by the output voltage detecting circuit; an oscillation circuit for outputting a reference clock signal depending on the output voltage; a counter circuit for counting a number of waves of the reference clock signal that depends on the number of frequency-division; and a frequency-dividing circuit that frequency-divides the reference clock signal depending on the number of waves counted by the counter circuit.
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Donovan Lincoln
Poos John W
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
Semiconductor Energy Laboratory Co. Ltd
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