Analog to digital conversion using correlated quantization and c

Details Analog to digital conversion using correlated quantization and c Analog to digital conversion using correlated quantization and c

1988-03-25

1990-05-15

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341125, 307201, 364602, H03M 136

Patent

active

049261800

ABSTRACT:
A 1-bit nonstandard A/D converter for converting a block u of N samples of a continuous time analog signal u(t) into N corresponding 1-bit binary values x, such that a distortion measure of the form d(u,x)=(Au-Bx).sup.T (Au-Bx) is minimized, is implemented with an N-input parallel sample-and-hold circuit and a neural network having N nonlinear amplifiers, where u and x are n-dimensional vectors, and A and B are N.times.N matrices. Minimization of the above distortion measure is equivalent to minimizing the quantity

REFERENCES:
patent: 4660166 (1987-04-01), Hopfield
patent: 4807168 (1989-02-01), Moonpenn et al.
patent: 4866645 (1989-09-01), Lish
David W. Tank et al., "Simple `Neural` Optimization Networks: An A/D Converter, Signal Decision Circuit, and a Linear Programming Circuit", IEEE Transactions on Circuits and Systems, vol. Cas-33, No. 5, May 1986, pp. 533-541.
Y. P. Tsividis et al., "Switched-Capacitor Neural Networks", Electronic Letters, vol. 23, No. 18, Aug. 27, 1987, pp. 958-959.

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