Electrical filter circuit utilizing charge transfer delay lines

Details Electrical filter circuit utilizing charge transfer delay lines Electrical filter circuit utilizing charge transfer delay lines

1979-07-24

1981-07-28

Lieberman, Eli

Wave transmission lines and networks

Coupling networks

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

333173, H03H 1702, G11C 2700

Patent

active

042812976

ABSTRACT:
A filter circuit utilizing charge transfer delay lines having individual CTD elements utilizing four-terminal resonators each of which is designated as a self-contained closed looped circuit and which determine the frequency dependent transmission characteristics of the filter circuit and wherein successive four-terminal resonators are interconnected by way of a coupling circuit. The invention utilizes the coupling circuit mounted between adjacent four-terminal resonators which are constructed simply as possible and utilizing integrated circuit techniques. Amplifiers are connected in parallel with the input and/or the output of the individual four-terminal resonators and the signal flow direction of the amplifiers corresponds to that of parallel connected CTD lines and the series lines of the coupling circuit and the amplifiers have unidirectional transmission characteristics and an inverting amplifier is contained in at least one of the series lines.

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