Multiple message multilevel analog signal recording and playback system containing configurable analog processing functions
US7197299B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2004 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | May 22, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/6041
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multilevel analog recording and playback system is described. The analog recording and playback system provides a variety of analog processing functions to enhance system level integration. The analog recording and playback system is an fully configurable integrated device that includes a plurality of signal paths, a microphone automatic gain control (“AGC”) circuit, volume control and filtering circuit, speaker driver circuit, gain selectable analog input, auxiliary input and output paths, configurable summation amplifiers having mixing features, multilevel analog memory storage array, and user selectable programming duration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.