Audio signal analog-to-digital converter utilizing a transformed-based input circuit

摘要: An apparatus for converting an input analog audio signal into digital form including analog-to-digital converter. amplifier circuit and step-down transformer provide interface the to The includes a primary winding operably coupled secondary drives with (or amplified version thereof). generates stepped-down representation of at its winding. Advantageously, lowers effective output impedance circuit, which reduces distortion in supplied In addition, (by factor 1/N) demand placed on charging sampling capacitor typically realized as part stage analog-to-digital-converter.