CONVERSION CIRCUIT FOR CONVERTING SINGLE INPUT TO DIFFERENTIAL INPUT AND SYSTEM CIRCUIT USING THE SAME
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United States of America Patent
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Issued Date -
Dec 14, 2023
app pub date -
Feb 10, 2023
filing date -
Jun 8, 2022
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Abstract
An embodiment of the present disclosure provides a conversion circuit for converting a single-ended input to a differential input, which has fewer switches and fewer capacitors. This conversion circuit increases the signal-to-noise ratio (SNR), and the conversion circuit directly uses the higher supply voltage AVDD without being bucked by the regulator, wherein the common mode voltage is AVDD/2N, and N is greater than 1. Overall, not only the circuit area is smaller and the SNR is higher, but also the manufacturing cost is reduced. In addition, compared with the prior art, the conversion circuit of the embodiment of the present disclosure has only three operation periods, so the control is simpler and the operation speed is faster.
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