Hold

Upsampling and zero order hold

Upsampling and zero order hold
  1. What is the difference between zero-order hold and first order hold?
  2. What does zero-order hold do?
  3. What is the difference between ZOH and FOH?
  4. What is the purpose of upsampling?

What is the difference between zero-order hold and first order hold?

Whereas the Zero-Order Hold circuit generates a continuous input signal u(t) by holding each sample value u[k] constant over one sample period, a First-Order Hold circuit uses linear interpolation between samples as shown by the model of Figure 20.39 and...

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 the difference between ZOH and FOH?

The ZOH is characterized by simple implementation and low computational volume, but it increases the approximation error in the discretization of the system model. However, FOH has less approximation error but is characterized by a higher delay [32] .

What is the purpose of upsampling?

The purpose of Upsampling is to manipulate a signal in order to artificially increase the sampling rate.

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