Howtosignalprocessing
- What does zero-order hold do?
- What is zero-order hold and first order hold?
- Is zero-order hold a low pass filter?
What does zero-order hold do?
The zero-order hold (ZOH) is a mathematical model of the practical signal reconstruction done by a conventional digital-to-analog converter (DAC). That is, it describes the effect of converting a discrete-time signal to a continuous-time signal by holding each sample value for one sample interval.
What is zero-order hold and first order hold?
Zero Order means the function is constant, we interpolate the same value in the missing parts. First order means we can use linear function to interpolate (Line with a slope). Hold means we hold the parameters to be the same until the next sample.
Is zero-order hold a low pass filter?
In the frequency domain, then, the zero-order hold corresponds to processing the samples with an approximation to a lowpass filter corresponding to the Fourier transform of a rectangular pulse.
