Proximity detector with rapid reception amplification

Details Proximity detector with rapid reception amplification Proximity detector with rapid reception amplification

1997-12-05

1999-07-27

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

250206, 250214A, 330250, 330296, 340600, G08B 1318

Patent

active

059297590

ABSTRACT:
A proximity detector including a rapid transistor (i.e., one having a very high product gain-band) connected to a high potential voltage via a capacitor. The capacitor is connected in series to a source of a pulsed current that is a function of the proximity of an object. The capacitor is also connected to a low potential voltage via an RC circuit. The mid-point of the RC circuit is connected to the collector of a transistor connected to the high potential voltage by a collector resistor in parallel with a gain resistor of the amplifier.

REFERENCES:
Paul Horowitz, et al., "The Art of Electronics," Cambridge University Press, (1989), pp. 86-87.
Patent Abstracts of Japan, vol. 7, No. 38, (P-176), Feb. 16, 1983 and JP 57 191501 A, Nov. 25, 1982.

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