Source Measure Unit (SMU)

ource and Measurement Units (SMUs) are devices that generate voltages or currents and can measure them simultaneously using the integrated measurement units (VMU, CMU). We differentiate between the following SMU types:

  • High current SMUs operate as a regulated power source and are able to generate very high output currents as pulses.
  • High-voltage SMUs work as a regulated voltage source and are able to generate very high output voltages.
  • Multi-channel SMUs usually have a number of identically structured voltage or current sources.
  • PXI Source Measurement Units are implemented as a plug-in card and additionally require a PXI chassis and a system controller.

Power Supply

A power supply provides the required power for a test application or additional devices. A constant output voltage is generated from an unstabilized input voltage. There are single-channel or multi-channel models with fixed or programmable output voltage. Other features include programmable current limiting or safety functions such as overvoltage protection (OVP) or overcurrent protection (OCP). If current and voltage can also be measured, it is generally referred to as a Source Measure Unit(SMU).

PXI Power Supply

A PXI power supply provides the required power for a test application or additional devices. A constant output voltage is generated from the stabilized voltage of the PXI chassis. There are devices with fixed output voltages or devices in which the output voltage can be freely programmed. Other features include, for example, a programmable current limit or the possibility to measure current and voltage. This function can then be compared to the properties of a PXI Source Measure Unit (SMU) .

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