Level detector

Details Level detector Level detector

1982-02-11

1985-04-23

Miller, Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307355, 328 26, H03K 5153, H03K 522

Patent

active

045132097

ABSTRACT:
A level detector having good linearity and a high detection efficiency is arranged so as to be small in size and inexpensive to produce, thereby being well suited for use in a semiconductor integrated circuit. The detector employs a common emitter amplifier having two transistors connected in parallel so that odd order harmonic distortion components are mutually eliminated while DC and even order harmonic components appear at the collector thereof. The detector further includes a high impedance load for the two parallel connected transistors. The load is composed of a transistor normally biased in its active region so as to thereby raise the detection efficiency.

REFERENCES:
patent: 3290520 (1966-12-01), Wennik
patent: 4053796 (1977-10-01), van de Plassche
patent: 4187537 (1980-02-01), Avicola et al.
patent: 4336586 (1982-06-01), Lunn
patent: 4410858 (1983-10-01), Kusakabe
An Integrated AM Stereo Decoder, IEEE Transactions on Consumer Electronics, vol. CE-27, No. 3, pp. 254-259.

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