Zero-order interpolation

1. What is zero order interpolation?
2. What is the purpose of a zero-order hold?
3. What is a zero order system?
4. What is the difference between zero-order hold and first order hold?

What is zero order interpolation?

In addition to bandlimited interpolation, a variety of other interpolation procedures are commonly used. One, referred to as a zero-order hold, interpo- lates between sample points by holding each sample value until the next sam- pling instant. This generates a staircase-like approximation to the original sig- nal.

What is the purpose of a zero-order hold?

A zero-order hold (ZOH) reconstructs a piece-wise constant signal from a number sequence and represents a model of the digital-to-analog converter (DAC). The output of the ZOH to an arbitrary input, r(kT), is a staircase reconstruction of the analog signal, r(t).

What is a zero order system?

1.5.

A zero-order system is defined by the equation. (1.2) where K = b/a₀ is the constant gain or static sensitivity. The static sensitivity constant reflects the storage nature of a zero-order system, and this is illustrated in the following example.

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...