MOS analog to digital converter

Details MOS analog to digital converter MOS analog to digital converter

1975-07-03

1978-04-04

Morrison, Malcolm A.

Communications: electrical

Audible indication

Percussion-type sound producer

307246, H03K 1300

Patent

active

040830454

ABSTRACT:
An MOS analog to digital converter circuit is provided in which an MOS enhanced capacitor is interposed between a buffer circuit responsive to an analog input and a digital output. The capacitance value present between the first terminal and the second terminal of the MOS enchanced capacitor is determined by the particular value of analog input voltage applied via the input buffer circuit. An oscillator pulse coupled to a second terminal of the enhanced capacitor produces a resultant pulse on the first terminal of the enhanced capacitor which in turn is coupled to an input of digital comparator circuits which are part of the digital output means. A series of reference voltages coupled to the other inputs of the digital comparator circuits allow the generation of a series of digital output signals whose value is indicative of the value of analog input signal present, thus accomplishing the analog to digital conversion function.

REFERENCES:
patent: 3719835 (1973-03-01), Eberhard
patent: 3743862 (1973-07-01), Bell
patent: 3753006 (1973-08-01), Crawford
patent: 3889135 (1975-06-01), Nomiya et al.
patent: 3911466 (1975-10-01), Lattin
patent: 3916327 (1975-10-01), Lampen et al.
patent: 3942047 (1976-03-01), Buchanan
patent: 4021788 (1977-05-01), Marr

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