Level detector

Details Level detector Level detector

1984-05-16

1986-11-04

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307261, 307264, 307362, 328 26, 330 2, H03K 508, G01R 1922

Patent

active

046212060

ABSTRACT:
Disclosed is a level detector in use with a differential amplifier circuit in an amplitude-limiting amplifying system for angle-modulation signal amplification. The differential amplifier circuit is made up of differentially paired transistors. The level detector contains first and second transistors which form a differential pair. In the first transistor, the base is connected to an interjunction of the emitters of the differentially paired transistors. A second transistor is connected at the emitter to the emitter of the first transistor. A current source is connected to the emitter interjunction of the first and second transistors. A bias circuit applies a predetermined bias potential to the base of the second transistor. An output signal containing the detected level information of the input signal is derived from the collector of the first or second transistor.

REFERENCES:
patent: 3770983 (1973-11-01), Gray
patent: 4007427 (1977-02-01), Leidich
patent: 4072907 (1978-02-01), Sekiva et al.
patent: 4088962 (1978-05-01), Trilling
patent: 4232271 (1980-11-01), Dobkin et al.
patent: 4264873 (1981-04-01), Kominami et al.
patent: 4295100 (1981-10-01), Kraemer
Japanese Patent Publication (KOKOKU) No. 57-18721.

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