Voltage-frequency conversion apparatus

Details Voltage-frequency conversion apparatus Voltage-frequency conversion apparatus

2007-08-28

2007-08-28

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Converting input current or voltage to output frequency

C327S100000

Reexamination Certificate

active

11332516

ABSTRACT:
A voltage-frequency conversion apparatus which has a variable current source for charging a capacitor; a current amount adjustment unit that adjusts a current amount of the variable current source for charging the capacitor to be corresponding to a differential voltage between a first voltage and a second voltage; a comparator that compares in level a charging voltage produced at one end of the capacitor and a reference voltage; a discharge unit that discharges the charging voltage of the capacitor according to the comparison result of the comparator when the charging voltage exceeds the reference voltage; and a reference voltage fluctuation unit that makes the reference voltage fluctuate. A frequency signal is generated from the comparator corresponding to the differential voltage between the first voltage and the second voltage.

REFERENCES:
patent: 4047056 (1977-09-01), Nakagawa
patent: 4316155 (1982-02-01), Hanisko
patent: 6169428 (2001-01-01), Mader
patent: 6653872 (2003-11-01), MacGugan
patent: 7061296 (2006-06-01), Friedrich et al.
patent: 2002-107428 (2002-04-01), None

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