Analogue-to-digital converter and analogue-to-digital conversion

Details Analogue-to-digital converter and analogue-to-digital conversion Analogue-to-digital converter and analogue-to-digital conversion

1995-07-10

1997-05-13

Gaffin, Jeffrey A.

Coded data generation or conversion

Analog to or from digital conversion

Using optical device,

341155, H03M 100

Patent

active

056296991

ABSTRACT:
An N-bit analogue-to-digital converter can increase the resolution by 3 bits, by very precise coding of the differential phase at the output of the electro-optic phase modulator controlled by the electric signal to be converted. The optical signals obtained are processed by an electro-optic device that outputs electric signals that are functions of the sine and cosine of the phase. A coding device uses the symmetry of the trigonometric circle partitioned into four consecutive sectors between 0 and 27.pi. in order to convert the absolute values of the electric signals obtained on (N-3) bits, independently of the home sector of the phase. A transcoding device uses the value of the sine and cosine coded on (N-3) bits, to output a value V of the electric signal, on N bits, as a function of the home sector. The conversion system according to the invention comprises a first N-bit analogue-to-digital converter doing a very precise but ambiguous conversion of the electric signal, and a second analogue-to-digital converter to eliminate the ambiguity.

REFERENCES:
patent: 4502037 (1985-02-01), Le Parquier et al.
patent: 4694276 (1987-09-01), Rastegar
patent: 4928007 (1990-05-01), Furstenau et al.
patent: 4947170 (1990-08-01), Falk
patent: 5010346 (1991-04-01), Hamilton et al.
patent: 5381147 (1995-01-01), Birkmayer

Affiliated with

Also associated with

Rating

Analogue-to-digital converter and analogue-to-digital 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 Analogue-to-digital converter and analogue-to-digital conversion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analogue-to-digital converter and analogue-to-digital conversion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1388651