Tone signal generator for producing multioperator tone signals
US5698805A · kind A · utility
6Cited by
20References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1995 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Sep 14, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2250/631
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention relates to a tone signal generator. The tone signal generator includes first tone signal generation means for producing a dual-tone, multi-frequency ("DTMF") audio signal; second tone signal means for producing a plurality of non-DTMF audio signals; storage means for storing data that represents at least one channel of an output audio tone signal; and selection means for selectively loading the DTMF signal into the storage means and for selectively accumulating the non-DTMF signals into the storage means so as to generate the output tone signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.