Patent ID: 7010136

Claim:
An electronic device for use in assisting a hearing impaired patient having a microphone, a preamp, a signal processing stage, and an output amplifier, the electronic device comprising: an active low pass filter responsively coupled between said signal processing stage and said output amplifier, said active low pass filter having an adjustable overshoot adapted to tunably match a measured resonance curve to provide a substantially smooth insertion gain frequency response, said active low pass filter including: a resistor coupled to a capacitor to form a low pass filter to provide a filtered signal; an operational amplifier to receive the filtered signal at an input of the operational amplifier; a feedback capacitor coupled from an output of the operational amplifier to the input of the operational amplifier; and a variable resistor to couple the low pass filter to the input of the operational amplifier, wherein said active low pass filter is adapted to provide a frequency of peak gain of the electronic device.