Digital-to-analog converter - preamplifier apparatus

Details Digital-to-analog converter - preamplifier apparatus Digital-to-analog converter - preamplifier apparatus

H - Electricity

03

M

H03M 1/66 (2006.01) H03M 3/00 (2006.01)

Patent

CA 2110385

2110385 9222140 PCTABScor01 A digital-to-analog converter-preamplifier apparatus (100) serving as an interface between a source of digital audio signal data (101) and an amplifier is disclosed. A digital stage (102) receives multiple digital audio signal inputs, a selected one of which is analyzed by a digital audio interface receiver (214), processed by a digital signal processing device (224) and a delta-sigma modulator (225) prior to passing to the analog stage for conversion from the digital domain into left and right channel analog audio output signals. Volume control is performed on the audio signal in both the digital domain and the analog domain in order to optimize performance and minimize noise. The present invention automatically adjusts for input word lenghts of greater than 18-bits.

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