Charge transfer delay line filters
US3944850A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1975 |
| Grant date | Mar 16, 1976 |
| Priority date | — |
| Expiry date | Jul 31, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D44/474
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A charge transfer analog signal filter is described in which a plurality of charge storage cells are connected in series to form a delay line having a time delay T between its input and output cells. In a feed-forward rejection filter the analog signal is applied to the input cell through a cell of area A.sub.1 and to the output cell through another cell of area A.sub.2. The transfer function of the rejection filter is ##EQU1## In a feedback bandpass filter the analog signal is applied to the input cell through a cell of area A.sub.1, and the output cell is coupled to the input cell through the series combination of an analog inverter and another cell of area A.sub.2. The transfer function of the bandpass filter is ##EQU2##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.