Patent ID: 11971770

Abstract:
The present invention disclosures a current calibration device for power supply channels in a test system, comprising n power supply channels, n connection switches corresponding to the n power supply channels, m resistors, m selection switches corresponding to the m resistors, a VBIAS power supply, a SPI bus, a host computer and an ammeter, wherein, both n and m are integers greater than 0; one end of each of the n power supply channels is connected to the SPI bus, and another end of each of the n power supply channels is connected to a node Q through a connection switch correspondingly, both ends of the selection switch are connected respectively to the node Q and one end of the resistor, and another end of the resistor is connected to the positive terminal of the ammeter, and the negative terminal of the ammeter is connected to the VBIAS power supply, and the VBIAS power supply is connected to the SPI bus simultaneously. The present invention provides a current calibration device and a current calibration method for power supply channels in a test system, which realizes segmented calibration through a software algorithm and improves measurement accuracy of the power supply channels; and solves a problem that a traditional current calibration for power supply channels can only cover a single point or a few voltage ranges.