Fast high precision discrete-time analog finite impulse response

Details Fast high precision discrete-time analog finite impulse response Fast high precision discrete-time analog finite impulse response

1994-12-21

1996-10-08

Mai, Tan V.

Boots, shoes, and leggings

G06G 702

Patent

active

055638198

ABSTRACT:
A high precision fast finite impulse response (FIR) filter which periodically samples an analog input signal and holds a sequentially-replaced number of the resulting discrete-time analog values in fixed storage cells while each value is being multiplied by a number of digital weights. The discrete-time analog values are not passed through delay devices and therefore do not degrade. The weights are stored in a memory or shift register and supplied to the multipliers in a repeating sequence. A predetermined number of the weights are set to zero to increase the setup time of the analog multipliers thereby increasing the precision without slowing the clocking frequency.

REFERENCES:
patent: 4316258 (1982-02-01), Berger
patent: 4318080 (1982-03-01), Yoshida
patent: 4475170 (1984-10-01), Haque
Haque and Copeland, "An Electrically Programmable Transversal Filter", International Electron Devices Meeting, Dec. 1976, pp. 27-30.
Tiemann, Engeler, and Baertsch, "A Surface Charge Correlator", IEEE Journal of Solid State Circuits, vol. SC-9, pp. 403-410, Dec. 1974.

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