Pulse density mapping method and circuit for delta sigma modulat

Details Pulse density mapping method and circuit for delta sigma modulat Pulse density mapping method and circuit for delta sigma modulat

1993-09-30

1994-09-13

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

H03M 302

Patent

active

053472780

ABSTRACT:
A method for mapping the serial 0 and 1 pulses received at a known clock rate from a delta sigma modulator All 0's are generated at the output when no 11 pairs are present in the input signal during the sampled clock periods. A 1 is generated at the output responsive to the input signal and the input signal delayed by one clock period both being 1's when no 00 pairs are present in the input signal during the sampled clock periods. A 1 is generated at the output for each 11 pair not balanced by a 00 pair when 11 and 00 pairs are serially alternating in the input signal during the sampled clock periods. According to this mapping method, the pulse density of 1's in the output signal increases only responsive to an increase in the net number of 11 pairs in the input signal during the sampled clock periods. A circuit for implementing this pulse mapping method is also described.

REFERENCES:
patent: 3292086 (1966-12-01), Magnuski
patent: 3731072 (1973-05-01), Johnston
patent: 4958158 (1990-09-01), Hashizume et al.
patent: 5079551 (1992-01-01), Kimura et al.
Oversampled Sigma-Delta Modulation, Robert M. Gray, Reprinted from IEEE Trans. Commun., vol. COM-35, pp. 481-489, May 1987.
A Unity Bit Coding Method by Negative Feedback, Hiroshi Inose, Reprinted from Proc. IEEE, vol. 51, pp. 1524-1535, Nov. 1963.
Oversampling Methods for A/D and D/A Conversion, James C. Candy and Gabor C. Temes, pp. 1-25, 1992.

Affiliated with

Also associated with

Rating

Pulse density mapping method and circuit for delta sigma modulat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pulse density mapping method and circuit for delta sigma modulat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulse density mapping method and circuit for delta sigma modulat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1123329