Operational Floating Current Conveyor based Digitally Controlled Hearing Aid

A digitally controlled operational floating current conveyor (OFCC) based filter for hearing aid is presented. The proposed circuit uses a trans conductance amplifier and band pass biquadratic filter for selection of a particular frequency band with the help of capacitor array for auditory impairment. The circuit uses only three OFFCs and MOS based grounded resistors which reduces power consumption significantly. Extensive simulations are carried out using SPICE to validate theoretical predictions and found in close agreement.