Category Archives: Data Converter

Brief Study of Dither B: Dither

In ‘Dither’ series A, I mentioned that the quantization will introduce large harmonics to a low-level sinusoidal signal. Let’s look at another example in Figure 1 [1]. Adding dither to the circuit means adding noise to the circuit. Now let’s … Continue reading

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Brief Study of Dither A: Before Dither

Does it make sense to add noise to enhance the converter’s performance? Dither – a puzzle to me for quite a long time. Recently I had time to read several related papers and APs. I would like to share some … Continue reading

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Those ADC Literature Surveys

Murmann’s ADC Performance Survey Recent ADC designers in the scientific world usually take Murmann’s Spreadsheet as a benchmark for their ADC performance. The survey ┬ácontains experimental data from two top conferences (ISSCC & VLSI Symposium) between 1997 and now (2012), … Continue reading

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ADC Performance B: INL vs. THD

In the previous post, I’ve looked at the relation between DNL and SNR. In DNL plot, where the variation of the nonlinearity error just looks like noise, so it’s easy to imagine that the SNR will be degraded due to … Continue reading

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ADC Performance A : DNL vs. SNR

Recently I pick up Wang Xiaobo‘s essays again. One sentence from him made a deep impression on me: do what you like is ‘have’; do what you don’t know why you are doing is ‘not have’. Then I came here … Continue reading

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Derive kT/C from Equipartition Theorem

It’s better to know(actually have to know) kT/C if you design ADCs. First, let’s take a look at its inverse-derivation (for detailed explanation, please go for elsewhere, there are lots of…): Then, comes the dessert of today – Equipartition Theorem … Continue reading

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Noise Figure of ADC

Recently, I’m studying some RF basics. When comes to the noise performance of a wireless system, noise figure (NF) is frequently used as a characterization term. It is defined as Noise figure is a measure of how much┬áthe signal-to-noise ratio … Continue reading

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