Magnetic sensor with CMOS multivibrator

Details Magnetic sensor with CMOS multivibrator Magnetic sensor with CMOS multivibrator

1997-06-06

1999-11-09

Strecker, Gerard

Electricity: measuring and testing

Magnetic

Magnetometers

324173, 32420713, 324244, 324260, 331111, G01R 3302, G01P 3487, H03K 3281

Patent

active

059821752

ABSTRACT:
A magnetic sensor includes a DC power source, a multivibrator circuit composed of two CMOS inverters, a resistor, and a capacitor, each of the CMOS inverters being composed of a pMOS transistor and an nMOS transistor connected in series, and a magneto-impedance element. In a transition state attributable to switching operations of the CMOS inverters, a sharp pulse current is caused to flow through the magneto-impedance element so as to excite the magneto-impedance element sufficiently causing the skin effect, whereas in a steady state, the flow of the current is stopped by the CMOS inverters so as to reduce power consumption.

REFERENCES:
patent: 3719835 (1973-03-01), Eberhard
patent: 4104619 (1978-08-01), Hesler
patent: 4150573 (1979-04-01), Iinuma et al.
patent: 5134371 (1992-07-01), Watanabe et al.
patent: 5705926 (1998-01-01), Senda et al.
patent: 5764055 (1998-06-01), Kawase

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