Semiconductor device and method of forming same for acoustic sensing of close proximity objects
US9151840B2 · kind B2 · utility
3Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2013 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Jul 2, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/527
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In embodiments a circuit provides a circuit for use in detecting close proximity objects in an acoustic distance sensing system. The circuit produces a close proximity zone flag when the time after transmitting an acoustic distance sensing pulse corresponds to the defined close proximity range. The circuit can also include a time of flight counter for determining the time of flight of a received echo. The circuit can further produce a close proximity time if flight valid flag indicating that echoes are being received in close proximity time frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.