Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2006-03-14
2006-03-14
Jeanpierre, Peguy (Department: 2819)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S102000, C330S103000, C330S104000
Reexamination Certificate
active
07012466
ABSTRACT:
A load responds to a voltage-to-current converter including a differential amplifier. A sensing resistor is series connected with the load and first and second feedback resistors, respectively included in first and second voltage dividers having taps connected to non-inverting and inverting inputs of the amplifier. One divider is connected between a first terminal of the sensor resistor and one voltage responsive input terminal of the converter. Another divider is connected between the second terminal of the sensor resistor and a second converter input terminal, that can be grounded or voltage responsive. The feedback resistors have the same value that is much greater than the sensor resistor value. The first divider can be connected to the first or second terminal of the sensor resistor and vice versa for the second divider.
REFERENCES:
patent: 3564444 (1971-02-01), Walsh
patent: 3638133 (1972-01-01), Meyers
patent: 4484331 (1984-11-01), Miller
patent: 5237558 (1993-08-01), Horikiri et al.
patent: 5856758 (1999-01-01), Joffe et al.
patent: 5881081 (1999-03-01), Hwang
patent: 5986910 (1999-11-01), Nakatsuka
Patent Abstracts of Japan vol. 009, No. 140 (E-321), Jun. 14, 1985 (abstract of JP 60 021585A).
Jeanpierre Peguy
Nguyen Khai
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