Current-voltage conversion circuit

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Converting input voltage to output current or vice versa

Reexamination Certificate

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Details

C327S538000, C327S541000

Reexamination Certificate

active

07737733

ABSTRACT:
A current-voltage conversion circuit which converts a current to be detected into a voltage, includes a detection resistor, amplifier circuit having a first operational amplifier, and an offset adjusting current source having a third resistor and a fourth resistor which are capable of trimming. The offset adjusting current source causes an offset adjustment current to flow in the offset resistor. The current value of the offset adjustment current is controlled by adjusting the resistance of the third resistor and the fourth resistor. A voltage at a node between the first transistor and the second resistor is output.

REFERENCES:
patent: 5231316 (1993-07-01), Thelen, Jr.
patent: 6249162 (2001-06-01), Inoue
patent: 6522175 (2003-02-01), Ueno et al.
patent: 7102335 (2006-09-01), Solie
patent: 60-47505 (1985-03-01), None
patent: 8-17066 (1996-01-01), None
patent: 8-33213 (1996-02-01), None
patent: 2000-166279 (2000-06-01), None
International Search Report for International Application No. PCT/JP2006-313792 mailed Oct. 17, 2006.
Written Opinion of the International Searching Authority for PCT/JP2006-313792 mailed Oct. 17, 2006.

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