Electronic selector switch particularly for use in radioscondes

Details Electronic selector switch particularly for use in radioscondes Electronic selector switch particularly for use in radioscondes

1979-12-04

1981-10-13

Karlsen, Ernest F.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 60C, 324 61R, 324120, 34087037, G01R 2726, G01R 1926

Patent

active

042950902

ABSTRACT:
The output of each of a plurality of CMOS inverting amplifiers is connected to a corresponding one of a plurality of impedances to be measured. A stepping circuit is connected to the inputs of the amplifiers. A voltage supply is connected to the amplifiers and provides a signal to be measured which is directed via a corresponding one of the amplifiers to an impedance measuring circuit connected to the impedances to be measured in common. The impedance measuring circuit produces an output impedance proportional to the impedances to be measured.

REFERENCES:
patent: 2937369 (1960-05-01), Newbold et al.
patent: 3631342 (1971-12-01), McDonald
patent: 3753373 (1973-08-01), Brown
patent: 4023094 (1977-05-01), Adams

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