Current mode CMOS building blocks for Hearing Aid application are proposed. The proposed circuits include, digital and analog automatic gain controls, digitally controlled Gm-C filters, and a pulse width modulation output stage. The circuits were fabricated in a 2 ?m n-well CMOS process through MOSIS.
El-Adawy A.A., Ahmed A.G., Soliman A.M., Elwan H.O.
Digital control systems; Digital filters; Gain control; Hearing aids; Pulse width modulation; Digitally programmable automatic gain control (DAGC) circuits; CMOS integrated circuits
Midwest Symposium on Circuits and Systems, Vol. 2, PP. 1175 to 1177