Fully integrated two axis shock detector

Details Fully integrated two axis shock detector Fully integrated two axis shock detector

1996-04-17

1999-05-25

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

327343, 327339, H04B 110

Patent

active

059072580

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.

REFERENCES:
patent: 3605029 (1971-09-01), Freedman
patent: 3614637 (1971-10-01), Kubanoff
patent: 4212205 (1980-07-01), West et al.
patent: 4250453 (1981-02-01), Nilsson
patent: 4357549 (1982-11-01), Miller
patent: 4358738 (1982-11-01), Kahn
patent: 5053725 (1991-10-01), Gesche et al.
patent: 5541953 (1996-07-01), Hiben et al.

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