What is Sample-and-hold circuit?

A circuit that captures (samples) the input voltage at an instant and holds it constant until AD conversion finishes. It is built from a switch and a capacitor.

Field: AD/DA conversion

Questions that mention Sample-and-hold circuit (2)

  1. What is the role of a sample-and-hold circuit placed before an AD converter?
  2. Which correctly describes the acquisition time of a sample-and-hold circuit?

Related terms

Crosstalk Aliasing Delta-sigma ADC DNL (differential nonlinearity) ENOB (effective number of bits) Flash ADC INL (integral nonlinearity) Jitter Missing code Noise shaping

Back to the glossary