Transversal filter having at least one analog shift register, an

Details Transversal filter having at least one analog shift register, an Transversal filter having at least one analog shift register, an

1977-11-30

1980-07-15

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

Frequency or time domain filters and delay lines utilizing...

307221D, 333166, H03H 728, H03K 513, G11C 1918, G11C 2700

Patent

active

042131057

ABSTRACT:
In the illustrated embodiments, the space required for a transversal filter with a given number of evaluation factors is reduced by providing valuator circuits embodying such factors as inputs to each successive capacitor element of a charge shifting device. In one mode of operation the signal to be filtered is sampled via the valuator circuits on each charge shift cycle while readout from the series output occurs on alternate cycles. Since the readout scanning frequency is a submultiple of the input sampling frequency, the filter is well suited as a low-pass filter.

REFERENCES:
patent: 4035628 (1977-07-01), Lampe et al.
Buss et al.-"Transversal Filter Using Charge-Transfer Devices" in "IEEE Journal of Solid State Circuits", vol. SC-8, No. 2, Apr. 1973; pp. 138-146.
Puckette et al.-"Bucket-Brigade Transversal Filters" in IEEE Trans. on Circuits and Systems, vol. CAS-21, No. 4, Jul. 1974; pp. 502-510.

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