Asynchronous successive approximation analog-to-digital conversion circuit
一种模数转换电路、异步逐次逼近的技术,应用在电子领域,能够解决影响有效位数等性能等问题
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[0042] As mentioned in the background art section, the metastability problem of the comparison circuit exists in the asynchronous successive approximation analog-to-digital conversion circuit in the prior art.
[0043] The inventor of the present application analyzed the prior art. In the prior art, the comparison circuit generally has the problem of metastable state, such as figure 2 As shown in the schematic diagram of the relationship between the time required for the comparison circuit and the input voltage difference, when the voltage difference between the two input terminals of the comparison circuit is very small (point A), the comparison circuit needs more time to compare the correct result; when the comparison circuit When the voltage difference at the input terminals of the device is large (point B), the time required will be stabilized at a minimum device delay time.
[0044] image 3 Yes figure 1 A schematic diagram of the relationship between the internal sta...
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