Programmable multifrequency digital tone receiver
US4709344A · kind A · utility
11Cited by
7References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1985 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Oct 2, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2218/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement for filtering input signals carried on PCM channels. The circuit arrangement includes a plurality of digital signal processors arranged in a parallel manner each having a set of filtering operations, a multiplexer for distributing the input signals to each digital signal processor, a processor for analyzing frequency characteristics output by the digital signal processors and an addressing PROM for controlling a correspondence between the PCM channels and the filtering operations in each of the digital signal processors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.