High carrier velocity FET magnetic sensor

Details High carrier velocity FET magnetic sensor High carrier velocity FET magnetic sensor

1976-06-30

1977-09-13

James, Andrew J.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

357 23, 357 58, 357 91, 307304, 307309, H01L 2722, H01L 2982, H01L 2996

Patent

active

040486486

ABSTRACT:
A FET structure for a magnetic field sensor which operates by achieving very high carrier velocities in the active region of the sensor is disclosed. A Hall output voltage is produced by the sensor in response to a magnetic flux field passing therethrough and, due to the high carrier velocities achieved, a very high sensitivity device is obtained by operating the FET structure in the pinch off mode or depletion mode. The position of the pinched off area of the conductive channel is varied to position the location of maximum carrier velocity in the channel at a desired point relative to an output probe. This position is controlled by the use of a control gate.

REFERENCES:
patent: 3448353 (1969-06-01), Gallagher et al.
patent: 3829883 (1974-08-01), Bate
patent: 3836993 (1974-09-01), Joshi
Channel Method for Detection of Magnetic Field, by Rekalova, Sov. Phys. Semiconductor, vol. 10, No. 2, Feb. 1976.
Fet. Hall Transducer with Control Gates, by Brown, IBM Technical Disclosure Bulletin, vol. 17, No. 7, Dec. 1974, pp. 1895-1896.
Micro-Electronic Magnetic Transducers, by Hollis, Measurement and Control, vol. 6, No. 1, Jan. 1973, pp. 38-40.
Japanese Journal of Applied Physics; by Vagi et al., vol. 15, No. 4, Apr. 1976, pp. 655-661.

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