Integrated filter circuit

Details Integrated filter circuit Integrated filter circuit

1979-06-22

1981-02-17

Lieberman, Eli

Wave transmission lines and networks

Coupling networks

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

333166, 333173, H03H 1502, H03H 1900

Patent

active

042517850

ABSTRACT:
The invention relates to an integrated filter circuit including a charge transfer device (CTD) transversal filter to which a sample-and-hold stage is post-connected. In such filters, a smoothing of the step-shaped signal output voltage emitted from the said stage is strived for. According to the invention, the smoothing ensues by means of a RC low pass which is realized by means of a "switched capacitor" circuit. This has two capacitors and two alternatively actuatable, electronic switches. The area of employment of the invention particularly embraces CTD transversal filters which are employed in systems with varying clock pulse frequencies.

REFERENCES:
Sequin & Tompsett; Charge Transfer Devices, Academic Press, Inc. 1975, pp. 52-59, 216-235.
Knauer et al.; Siemens Forschungs-und Entwicklungs-Berichte, vol. 7, No. 3, 1978, pp. 138-142.
Caves et al; IEEE Journal of Solid State Circuits, vol. SC-12, No. 6, Dec. 1977, pp. 592-599.

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