Filter device
US6272509A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1998 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Dec 9, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0223
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to a filter device, and is intended to prevent drastic changes of output modulation signal and assures the performance as modulator if output modulation signal is transmitted and stopped frequency by using TDMA in communication control. To achieve the object, the invention comprises a shift register 1, a plurality of memories 2 connected to this shift register 1 and increased in the bit width of input address by one bit each, and a selector 3 for selecting outputs from these plurality of memories 2, in which the output of the shift register 1 is used as a higher side address of each one of the memories 2, a lower side address of each one of the memory addresses is common, the bit width of the higher side address increases by one bit each starting from one bit, and addresses are assigned sequentially from the lower side of the higher side address of the memories 2 depending on the shift from the lowest side bit of the shift register 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.