Electronic filters, signal conversion apparatus, hearing aids and methods
US5111419A · kind A · utility
128Cited by
10References
46Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1988 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Apr 11, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R25/505
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An electronic filter for filtering an electrical signal. Signal processing circuitry therein includes a logarithmic filter having a series of filter stages with inputs and outputs in cascade and respective circuits as PAC GOVERNMENT SUPPORT This invention was made with U.S. Government support under Veterans Administration Contract VA KV 674P857 and National Aeronautics and Space Administration (NASA) Research Grant No. NAG10-0040. The U.S. Government has certain rights in this invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.