Filter circuit utilizing charge transfer device
US4308509A · kind A · utility
53Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1980 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Jan 18, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H15/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A non-recursive transversal filter circuit employs a charge transfer device in which certain of the capacitive storage elements are divided into first and second capacitive portions having predetermined capacitance relationships. The charge in the second capacitive storage elements is sensed at predetermined times to produce an output signal. The relative capacitances of the second capacitance portions provide weighting factors to the filter. Embodiments include bucket brigade devices with bipolar and FET transistors as well as charge coupled devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.