Coarse/fine A-D converter using ramp waveform to generate fine d

Details Coarse/fine A-D converter using ramp waveform to generate fine d Coarse/fine A-D converter using ramp waveform to generate fine d

1987-08-25

1989-02-14

Sloyan, T. J.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

324 99D, 341169, H03M 168, H03M 136, H03M 156

Patent

active

048049395

ABSTRACT:
Analog-to-digital conversion in which a coarse digital representation of an input analog signal is converted to a coarse analog representation, and the difference between the original analog signal and the coarse analog representation is determined. A ramp waveform signal is generated, and a change in that waveform by an amount substantially equal to the difference between the original analog signal and the coarse analog representation is sensed. A plural bit fine digital signal corresponding to the sensed change of the ramp waveform is produced. The combination of the coarse and fine digital signals constitute the digital representation of the input analog signal. In one embodiment, the ramp waveform is increased until it is equal to the difference between the analog signal and the coarse analog representation, whereupon the ramp waveform is digitized. In another embodiment, the ramp waveform is used to reduce the level of a sample of the analog signal until that sample becomes equal to the coarse analog representation, at which time a counter that had been initiated at the commencement of sample reduction is stopped, the count being equal to the fine digital signal.

REFERENCES:
patent: 4099173 (1978-07-01), Zeskind et al.
patent: 4559523 (1985-12-01), Wakita
Schmid, Electronic Analog/Digital Conversions, Van Nostrand Reinhold Company, 1970, pp. 122-126 and 274-279.

Affiliated with

Also associated with

Rating

Coarse/fine A-D converter using ramp waveform to generate fine d does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coarse/fine A-D converter using ramp waveform to generate fine d, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coarse/fine A-D converter using ramp waveform to generate fine d will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1368741