Hearing aid with audible alarm
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United States of America Patent
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Mar 9, 2004
Issued Date -
N/A
app pub date -
Jun 20, 2002
filing date -
Sep 29, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A low battery detection circuit is disclosed for detecting low battery voltages in hearing aids and other battery operated devices. The low battery detection circuit operates reliably on a small amount of current, which does not significantly increase overall battery drain. An output signal is generated whose amplitude and frequency increase as battery voltage decreases below a predetermined level. The circuit's minimal number of components and output signal characteristics make it particularly applicable as a low battery early warning device for hearing aid devices.
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Family
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