A micropower analog hearing aid on low voltage CMOS digital process
نویسندگان
چکیده
A two-chip analog micropower hearing aid circuit is developed which is based on a low voltage three micron CMOS process. The novel features of the circuit are the use of adaptive biasing of MOS Translinear Loop ( MT15 ) circuit and an innovative application of an adapiive technique in reducing the value of a degeneradng linearising resistor in the input differential stage of ,the AGC block. The above two measures enable reduction of power consumption and external component count. Class-D amplifer provides high conversion eficiency at the output stage. The proposed configuration is now under integration for developing a one chip general purpose CMOS analog heaving aid with capability to operate with 1.0 volt supply voltage.
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