초록 ▼

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 gener

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 circuits minimal number of components and output signal characteristics make it particularly applicable as a low battery early warning device for hearing aid devices.

대표청구항 ▼

[ I claim:] [1.]1. A hearing aid comprising:a hearing aid circuit including an amplifier for amplifying audio signals;a battery connected to supply power to said hearing aid circuit;an alarm system for generating an audio signal in an audible frequency range in response to the voltage output of said

[ I claim:] [1.]1. A hearing aid comprising:a hearing aid circuit including an amplifier for amplifying audio signals;a battery connected to supply power to said hearing aid circuit;an alarm system for generating an audio signal in an audible frequency range in response to the voltage output of said battery falling below a predetermined threshold value, said audio signal being connected for amplification by said amplifier, said audio signal being an audible frequency tone having at least one of a frequency and a loudness that increases as the voltage of said battery decreases, said audio signal comprising a cyclically alternating uninterrupted audio signal.