A Successive Approximation Analog-to-Digital Converter Structure and Its Low Power Switching Method
A successive approximation, analog-to-digital converter technology, applied in the direction of analog/digital conversion, code conversion, energy saving methods, etc., can solve the problems of large power consumption and area overhead, achieve good economic benefits, reduce dynamic energy Consumption, the effect of improving accuracy
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[0041] The present invention will be further described below in conjunction with the accompanying drawings.
[0042] Such as figure 1 Shown is a successive approximation analog-to-digital converter structure using the highest-bit capacitor backplane sampling technology, including gate voltage bootstrap sampling switch 1, capacitor array digital-to-analog converter 2, comparator 3 and successive approximation control logic 4, gate The voltage bootstrap sampling switch 1 includes a non-inverting terminal grid voltage bootstrap sampling switch and an inverting terminal grid voltage bootstrap sampling switch, and the capacitor array digital-to-analog converter 2 includes a non-inverting terminal capacitor array and an inverting terminal capacitor array; the non-inverting terminal capacitor array passes The gate voltage bootstrap sampling switch at the non-inverting terminal is connected to the non-inverting input signal V ip , the inverting terminal capacitor array is connected t...
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