Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1975-04-25
1977-03-01
Wojciechowicz, Edward J.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
357 23, 357 27, 357 28, 357 38, 307299R, 307308, H01L 2966, H01L 2722, H01L 2974, H03K 326
Patent
active
040104869
ABSTRACT:
A sensing circuit for detecting a change in a normal characteristic of an object such as a change in a normal temperature characteristic, a change in a normal magnetic field characteristic, or a change in a normal light falling on the sensing element of the sensing circuit is provided. The circuit employs a four-terminal semiconductor device having alternate layers of conductivity type, which has an amplification characteristic of the collector current to the base-emitter grounded, wherein there is a sharp decrease in the h.sub.FE amplification characteristic at one value of gate to emitter voltage. This point represents the point in which the semiconductor device is biased for a normally desired characteristic being sensed. Whenever there is a deviation from this normal position, there is a sharp rise in the h.sub.FE irrespective of what the direction of deviation is. The h.sub.FE gain then substantially levels off.
REFERENCES:
patent: 3204160 (1965-08-01), Sah
patent: 3600650 (1971-08-01), Obenhaus et al.
patent: 3641404 (1972-02-01), Per
patent: 3668439 (1972-06-01), Fujikawa et al.
Sony Corporation
Wojciechowicz Edward J.
LandOfFree
Sensing circuits does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sensing circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensing circuits will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1355780