Electrically reprogrammable transversal filter using charge coup

Details Electrically reprogrammable transversal filter using charge coup Electrically reprogrammable transversal filter using charge coup

1977-08-16

1978-10-10

Ruggiero, Joseph F.

Boots, shoes, and leggings

307221D, 328167, 333 70T, 364825, 364841, 364862, G06G 716, H03K 5159

Patent

active

041200357

ABSTRACT:
A charge coupled device analog multiplier is used to weigh the sampled and delayed signals for a transversal filter. The digital filter coefficients for the analog multiplier can be electrically programmed and therefore dynamic time-varying systems, such as matched filters, can be designed with reduced circuit complexity. The digital filter includes means for sampling without destroying an analog signal at various points and providing voltages proportional to each sampled signal. The voltages are separately applied to a charge coupled device analog multiplier which accepts the voltages and provides means for multiplying the digital filter coefficient by the analog voltage. The multiplied sample signal is then dumped into a means for summing all of the weighted sample signals to produce an analog signal modified by the digital filter coefficients.

REFERENCES:
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patent: 3952188 (1976-04-01), Sloate et al.
patent: 3979582 (1976-09-01), Mims
patent: 4032767 (1977-06-01), Lagnado
patent: 4039978 (1977-08-01), Heller
patent: 4052606 (1977-10-01), Heller et al.
Ibrahim et al., "CCD's for Transversal Filter Applications", Technical Digest, 1974, International Electron Device Meeting, pp. 240-243.
Brodersen et al., "A 500-Point Fourier Transform Using Charge--Coupled Devices", Conference Record, 1975, IEEE, ISSCC, pp. 144-145.
Mattern et al., "A Reprogrammable Filter Bank Using CCD Discrete Analog Signal Processing", Conference Record, 1975, IEEE, ISSCC, pp. 148-149.
Hague et al., "An Electrically Programmable Transversal filter", Technical Digest, 1976, International Electron Device Meeting, pp. 27-30.
Sequin et al., "Linearity of Electrical Charge Injection into Charge-Coupled Devices", Tech. Digest, 1974, Int'l Electron Device MTG., pp. 229-232.
Wen et al., "Analysis and Design of a Single-Stage Floating Gate Amplifier", Conference Record, 1973, IEEE, ISSCC, pp. 154-155.

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