Analog-to-digital converter

Details Analog-to-digital converter Analog-to-digital converter

1977-06-27

1979-03-27

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

H03K 1320

Patent

active

041468813

ABSTRACT:
An analog-to-digital converter characterized in that it includes a generator supplying a substantially linear voltage ramp, a source of at least two reference voltage levels precisely related one with respect to the other (one of which may be ground), an input for an analog signal whose voltage level is to be expressed in digital form, a comparator for comparing the increasing voltage of the ramp and the three voltage levels in order to identify the instants when the ramp reaches these levels, time
umerical conversion means for producing from these instants, a first number corresponding to the time for the ramp to go from the first reference voltage level to the second one, and a second number corresponding to the time for the ramp to go from one of the reference levels to the input analog signal level, and digital counting means arranged to carry out the quotient of these numbers, the quotient representing, in a digital form, the level of the input analog signal.

REFERENCES:
patent: 3886541 (1975-05-01), Watson
Smarandoiu "IEEE Journal of Solid State Circuits" Jun. 1976, pp. 408-410.

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