Fully integrated two axis shock detector
US5907258A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 17, 1996 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Apr 17, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention discloses a fully integrated precision HDA shock sense circuit with high-order filters implemented in integrated circuit technology. Filters are integrated with an improved on-chip bias generator so that they can provide stable, trimmable and/or programmable frequency responses with a minimum number of external capacitors. The invention provides dual full-wave rectifiers for X-axis and Y-axis shock sensing so that more accurate and reliable shock detection can be achieved. Input signals from X-axis and Y-axis shock sensors are converted to current and provided to the dual full-wave rectifiers. The currents thus full-wave rectified are summed and lowpass filtered to generate an output signal, which is then fed to a comparator to produce a shock detection logic signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.