Digital-to-analog converter with cascaded least significant bit (LSB) interpolator circuit
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United States of America Patent
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Nov 7, 2023
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Jul 27, 2023
app pub date -
Jan 21, 2022
filing date -
Jan 21, 2022
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Abstract
A digital-to-analog converter (DAC) for converting a digital input word to an analog output signal includes a string DAC, a first interpolator and a second interpolator. The string DAC outputs a first voltage and a second voltage in response to M most significant bits of the digital input word. The first interpolator interpolates between the first and second voltages in response to middle Q least significant bits of the digital input word and provides a first interpolated voltage. The second interpolator interpolates between the first interpolated voltage and the second voltage in response to lower P least significant bits of the digital input word.
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