Apparatus and methods for digital-to-analogue conversion

Details Apparatus and methods for digital-to-analogue conversion Apparatus and methods for digital-to-analogue conversion

1986-07-30

1987-10-27

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

H03M 166

Patent

active

047033088

ABSTRACT:
In view of the limited speed times accuracy product of A-to-D and D-to-A converters, a required digital accuracy or sufficiently smooth analogue waveform cannot always be obtained. The present invention is useful in enhancing available converters. In the A-to-D version a stepped interpolation waveform obtained from a generator 13 is added to samples of an analogue waveform obtained from a sample-and-hold circuit 11 at a frequency 2f.sub.B (where f.sub.B is the bandwidth of the input signal). The resultant signal is applied to an n-bit A-to-D converter 15 operating at 2.sup.m times 2f.sub.B and the converter output is averaged using an accumulator 16 reset at 2f.sub.B. The accumulator output is a higher accuracy signal since it has m+n bits. An analogous technique is described for D-to-A conversion.

REFERENCES:
patent: 3292173 (1966-12-01), Horton
patent: 4006475 (1977-02-01), Candy
patent: 4079373 (1978-03-01), Brown
patent: 4109110 (1978-08-01), Gingell
patent: 4484178 (1984-11-01), Lovgren
Wooley, "IEEE Journal of Solid-State Circuits", vol. SC-14, No. 1, Feb. 1979, pp. 20-25.

Affiliated with

Also associated with

Rating

Apparatus and methods for digital-to-analogue conversion does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and methods for digital-to-analogue conversion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and methods for digital-to-analogue conversion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1274520