Single string resistive divider network for a digital multimeter

Details Single string resistive divider network for a digital multimeter Single string resistive divider network for a digital multimeter

1992-03-27

1994-12-13

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 91, 361119, H02H 906

Patent

active

053734106

ABSTRACT:
A relatively large protection resistor is connected between the measurement in-out terminal and the internal circuitry of a digital multimeter. A clamping circuit at the input to the internal circuitry insures that any voltage applied to the input terminal will be dropped across the protection resistor, thereby avoiding an over-voltage condition which could damage the internal circuitry. A resistive divider network used to make measurements is connected between the protection resistor and the clamping circuit and is designed to take the protection resistor into account during measurements.

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patent: 4736327 (1988-04-01), Power
patent: 4794383 (1988-12-01), Havel
patent: 4864512 (1989-09-01), Coulson et al.

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