Controlled multidigit resistance box

Details Controlled multidigit resistance box Controlled multidigit resistance box

G - Physics

01

R

324/45

G01R 27/00 (2006.01)

Patent

CA 1104210

CONTROLLED MULTIDIGIT RESISTANCE BOX Abstract of the Disclosure According to the invention, each digit of the contro- lled multidigit resistance box comprises "n" series-connec- ted resistors, an operational amplifier and two switching elements connected to each lead of each resistor. One of the switching elements is connected to the inverting input of the operational amplifier, while the other is connected to the output of the operational amplifier. The resistance box further includes a control unit for selecting a desired combination of resistors, connected to the switching ele- ments of each digit. The center tap of power sources of the operational amplifier of the previous digit is connected to the input of the next digit of the resistance box.

303933

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