Analog to digital converter

Details Analog to digital converter Analog to digital converter

1981-06-26

1985-06-11

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

340347SH, H03K 1302

Patent

active

045231800

ABSTRACT:
In an analog to digital converter of the type wherein an analog input voltage is compared, at a comparator with a known reference voltage selected based on a digital data produced from a control circuit, an updated digital data is generated based on a result of the comparison, and the above operation is repeated to perform digital conversion sequentially from higher bit to lower bit, there are provided two capacitors of capacitances at a predetermined ratio which is so determined as to reduce the number of serial resistors in a voltage generator circuit adapted to generate the reference voltage based on the digital data produced from the control circuit, and a voltage developing at a junction between the two capacitors is coupled to the input of the comparator, so that a change in voltage of the voltage generator circuit is reduced at a predetermined ratio in accordance with electric charge distributed on the two capacitors and is applied to the input of the comparator.

REFERENCES:
Fotouhi "1979 IEEE International Solid-State Circuits Conference", Feb. 15, 1979, pp. 186-187.

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