Electronic ausculscope
US4731849A · kind A · utility
12Cited by
8References
27Claims
0Family size
Inventor
Key dates
| Filing date | Jul 30, 1986 |
| Grant date | Mar 15, 1988 |
| Priority date | — |
| Expiry date | Jul 30, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B7/04
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A battery source of dc voltage continuously energizes digital circuitry for controlling operation of analog signal processing circuitry including a microphone preamplifier, an automatic gain control amplifier, a bandpass section and an output buffer driving audio reproducing equipment. The analog signal processing circuitry is energized on select command from the battery source through a switched on power supply. Automatic operation of the gain control amplifier may be disabled and the bandpass section by-passed in response to other select commands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.