Switched capacitor digital-analog converter with a decreased har

Details Switched capacitor digital-analog converter with a decreased har Switched capacitor digital-analog converter with a decreased har

1997-06-11

1999-04-06

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341144, H03M 166

Patent

active

058924736

ABSTRACT:
In a D/A converter employed in audio systems and various communicating equipment, particularly for using a digital 1-bit data stream as an input and an analog signal as an output, a switched capacitor digital-analog converter having a decreased harmonic distortion utilizes a charge subtraction method in a low-pass filter instead of employing a bypass filter to prevent an operational amplifier from deviating from a linear range due to a switching noise. The bypass capacitor heretofore used in the D/A converter is not employed to shrink the chip designing area.

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