Single slope A/D converter with sample and hold

Details Single slope A/D converter with sample and hold Single slope A/D converter with sample and hold

1978-06-08

1980-03-04

Morrison, Malcolm A.

Communications: electrical

Audible indication

Percussion-type sound producer

325142, 340347NT, H03K 1302

Patent

active

041919424

ABSTRACT:
A converter circuit employs a capacitor coupled through a selector switch to an analog voltage so that the capacitor is charged to the analog level. When a conversion is commanded, the capacitor is disconnected from the analog voltage and discharged through a constant current load. This results in a linear voltage ramp. A comparator senses the capacitor voltage and compares it to a reference level that is slightly above ground. Upon starting the ramp an increment of voltage slightly larger than the reference is applied in series with the capacitor. When the ramp drops below the reference level the comparator output is used to terminate the conversion interval. Thus, the conversion interval is directly and linearly proportional to the magnitude of the analog voltage. If desired, the conversion interval can be used to operate a counter to provide a conventional digital readout. Alternatively, the device can be operated by a microprocessor with the readout being sensed and displayed if desired by the microprocessor. Due to the increment of voltage, the zero analog voltage conversion interval is a fixed finite time.

REFERENCES:
patent: 3555298 (1971-01-01), Neelands
patent: 3566397 (1971-02-01), Walton
patent: 3725903 (1973-03-01), Kosakowski
patent: 3725905 (1973-04-01), Tunzi
patent: 3739375 (1973-06-01), Chatelon et al.
patent: 3801834 (1974-04-01), Lai
patent: 3958236 (1976-05-01), Kelly
patent: 4015254 (1977-03-01), Strandt

Affiliated with

Also associated with

Rating

Single slope A/D converter with sample and hold does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Single slope A/D converter with sample and hold, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single slope A/D converter with sample and hold will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2042180