Charge redistribution circuit having reduced area

Details Charge redistribution circuit having reduced area Charge redistribution circuit having reduced area

1980-12-22

1983-04-19

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347C, 340347M, H03K 1302

Patent

active

043807569

ABSTRACT:
A codec using charge redistribution techniques between two groups of banks of weighted capacitors, which requires substantially reduced chip area as compared to previous codecs of this type. A switching scheme by which the capacitors are switched between themselves to various leads allows the elimination of the previously required largest capacitor of one bank and its replacement by a capacitor of one eighth its value and size (as well as several very small capacitors) in the other bank. The switching scheme also allows the use of only one reference voltage level, whereas in the past two were required.

REFERENCES:
patent: 4195282 (1980-03-01), Cameron
Mostek Corporation, Data Sheet for MK5150 Companding Codec, 5 pages, Cited by applicant.

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