Howtosignalprocessing
- What is ADC aperture jitter?
- What is jitter in ADC?
- What is aperture error in ADC?
- What is aperture delay?
What is ADC aperture jitter?
This sample-to-sample variation in the instant the switch opens is called aperture uncertainty, or aperture jitter and is usually measured in rms picoseconds. The amplitude of the associated output error is related to the rate-of-change of the analog input.
What is jitter in ADC?
Any deviation or uncertainty of the time interval between two samples with respect to the ideal interval, defined as jitter, translates into sampling errors that degrade the signal quality at the ADC's output.
What is aperture error in ADC?
Aperture uncertainty is a key ADC concern when performing IF sampling. The terms aperture jitter and aperture uncertainty are synonymous and are frequently interchanged in the literature. Aperture uncertainty is the sample-to-sample variation in the encoding process. It has three distinct effects on system performance.
What is aperture delay?
Aperture delay (tAD) in an ADC is the interval between the sampling edge of the clock signal (the rising edge of the clock signal in the figure) and the instant when the sample is taken. The sample is taken when the ADC's track-and-hold goes into the hold state.
