Frequency response display for use with a graphic equalizer

Details Frequency response display for use with a graphic equalizer Frequency response display for use with a graphic equalizer

1982-12-23

1985-08-06

George, Keith E.

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

34081511, G01R 2317

Patent

active

045340579

ABSTRACT:
An indicator and display for use with a graphic equalizer which receives an audio signal and includes first and second band pass filters which receive the audio signal and pass different pass bands, first and second variable resistors which have control shafts and knobs connected thereto with illuminators mounted in the knobs, first and second rectifiers connected to the output of the band pass filters, and first and second drive circuits connected to the outputs of the first and second rectifiers and the drive circuits connected to the illuminators in the knobs and an oscillator switching circuit connected to the illuminators so as to cause the illuminators to flash under certain conditions.

REFERENCES:
patent: 3849769 (1974-11-01), Chiba
patent: 3924231 (1975-12-01), McClure
patent: 4118601 (1978-10-01), Yeap
patent: 4307340 (1981-12-01), Inami et al.
patent: 4345247 (1982-08-01), Thornton et al.
patent: 4359601 (1982-11-01), England
patent: 4405836 (1983-09-01), Meyerhoff

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