Inductorless monolithic crystal filter network
US4246554A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1978 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | Dec 11, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/542
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A two-pole inductorless monolithic crystal filter device comprising first and second spaced electrodes mounted on one face of the device, third and fourth spaced electrodes mounted on the opposite face of the device in superimposed relationship with the first and second electrodes, a first capacitor coupled between the first and fourth electrodes, means electrically coupling the second and third electrodes, and a second capacitor coupling the second and third electrodes to a point of reference potential with the first electrode and point of reference potential being designated as input terminals and the fourth electrode and point of reference potential being designated as output terminals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.