Electrical pulse counters – pulse dividers – or shift registers: c – Pulse counting or dividing chains
Reexamination Certificate
2008-05-19
2010-06-29
Lam, Tuan (Department: 2816)
Electrical pulse counters, pulse dividers, or shift registers: c
Pulse counting or dividing chains
C377S119000, C324S253000
Reexamination Certificate
active
07746973
ABSTRACT:
A signal detection circuit comprising: a differential amplifier to which an output voltage of a detection coil of a magnetic sensor is to be applied; a comparator to output a digital signal being at one logic level in a period between two spike-shaped voltages adjacent to each other in the output voltage of the differential amplifier; and a count circuit to perform a count operation in a period during which the comparator outputs the digital signal of the one logic level, the count circuit including a first counter to count a first clock having a predetermined frequency, a second counter to count a second clock being equal in frequency to and different in phase from the first clock, the second counter having the same number of bits as the number of bits of the first counter, and an adder to add count values of the first and the second counter.
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Kaneta Yasuhiro
Saito Hiroshi
Gunther John E.
Lam Tuan
Sanyo Electric Co,. Ltd.
Sanyo Semiconductor Co. Ltd.
Sereboff Steven C.
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