Circuit for detecting variation of resistance of a variable-resi

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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307308, 307494, H03K 301, H03K 1790, H03K 522

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active

047163062

ABSTRACT:
A circuit for detecting the variation of resistance of a variable-resistance element comprises a pair of grounded-base transistors with their base electrodes provided with different base voltages and with their emitter electrodes connected to both terminals of the variable-resistance element so that the voltage between both terminals of the element is kept constant. The current density of the variable-resistance element does not vary when the resistance of the variable-resistance element varies, whereby the lifetime of the element can be prolonged.

REFERENCES:
patent: 3622898 (1971-11-01), Salmon
patent: 3898486 (1975-08-01), Wessel et al.
patent: 4163160 (1979-07-01), Frazee

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