Charge-transfer coded-voltage generator for use in analog-digita

Details Charge-transfer coded-voltage generator for use in analog-digita Charge-transfer coded-voltage generator for use in analog-digita

1980-12-10

1982-09-21

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

340347AD, 364862, 357 24, H03K 1302

Patent

active

043509762

ABSTRACT:
Successive two-trip traversals of charges between gates G.sub.0 and G.sub.2 make it possible to obtain beneath gates G.sub.1 and G.sub.2 quantities of charges equal to Q.sub.R, Q.sub.R /2, Q.sub.R /2.sup.2 . . . Q.sub.R /2.sup.i. A readout device for reading charges and connected to gates G.sub.2 and G.sub.4 generates voltages V.sub.R and V.sub.Ri =a.sub.0 .multidot.V.sub.R +a.sub.1 .multidot.V.sub.R /2+ . . . +a.sub.i-1 .multidot.V.sub.R /2.sup.i-1 +V.sub.R /2.sup.i which are compared with a voltage sample V.sub.x to be coded in order to determine by successive approximations the coefficients a.sub.0 . . . a.sub.n which are equal to 0 or to 1 such that V.sub.x =a.sub.0 .multidot.V.sub.R +a.sub.1 .multidot.V.sub.R /2+ . . . +a.sub.n .multidot.V.sub.R /2.sup.n. Depending on the value of a.sub.i, each quantity of charges Q.sub.R /2.sup.i stored beneath gate G.sub.1 is removed beneath diode D.sub.e or stored beneath gate G.sub.3 and then transferred beneath gate G.sub.4.

REFERENCES:
patent: 3836906 (1974-09-01), Ando
patent: 3906488 (1975-09-01), Suarez-Gartner
patent: 4087812 (1978-05-01), Terman
patent: 4099175 (1978-07-01), Rubin
patent: 4145689 (1979-03-01), Butler
patent: 4164734 (1979-08-01), Jensen
patent: 4206446 (1980-06-01), Rockett
patent: 4213120 (1980-07-01), Buchanan
patent: 4306221 (1981-12-01), Jiang

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