Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1975-06-06
1976-10-05
Miller, Charles D.
Communications: electrical
Audible indication
Percussion-type sound producer
H03K 1317
Patent
active
039848329
ABSTRACT:
A series current steering high speed analog-to-digital converter. The converter includes means for providing n number of weighted current sources and drains of having 1/2, 1/4, 1/8, - - - 1/2.sup.n of a reference current, I.sub.r, wherein n represents an integer number, n diodes bridge circuits connected in series, n comparators coupled to corresponding bridging arms of the bridge circuits. The current sources and drains, the bridge circuits and the comparators are operatively coupled to form n sections in series to steer the currents therethrough so that the first section compares the amplitude of the input current with 1/2 of the reference current and generates the most significant bit, the second section compares the absolute valve of the difference between the input current and the 1/2 to 1/4 of the reference current for generating the second most significant bit, and so on, till the n bit digital word output is formed from the input current. Advantageously, the present series current steering analog-to-digital converter eliminates the need for sample and hold circuitry and increases the speed of the conversion by an order of magnitude compared to conventional steering circuit and can be rendered in a monolithic analog-to-digital converter structure.
REFERENCES:
patent: 3138760 (1964-06-01), Gilbert
patent: 3242479 (1966-03-01), Euler
patent: 3340526 (1967-09-01), Sugarman
patent: 3735390 (1973-05-01), Drangeid
patent: 3786493 (1974-01-01), Baldwin
Miller Charles D.
Motorola Inc.
Parsons Eugene A.
Weiss Harry M.
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