Non-uniform weighting circuitry

Details Non-uniform weighting circuitry Non-uniform weighting circuitry

1977-10-07

1981-02-10

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347AD, 340347M, 370 7, H03K 1302

Patent

active

042504929

ABSTRACT:
A non-uniform weighting circuitry which is effective for enhancing speed and accuracy in the operations of encoders and decoders comprises in a cascade connection a constant current switch, a variable attenuator, a polarity changing circuit and a uniform weighting circuit. An impedance converting means is provided to make at least one of input and output terminals of the variable attenuator to be of low impedance, whereby spike-like noises generated by a switching element constituting a part of the variable attenuator is reduced.

REFERENCES:
patent: 3582941 (1971-06-01), Le Maout
patent: 3675234 (1972-07-01), Metz
patent: 3685045 (1972-08-01), Pastoriza
patent: 3705359 (1972-12-01), Kappes
patent: 3723896 (1973-03-01), Flickinger
patent: 3735264 (1973-05-01), Mauduech

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