Patent ID: 11971770
Assignee: nan
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. 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, 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, two 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 host computer controls one of the connection switches and one of the selection switches to open and close, and the SPI bus controls output voltages of the n power supply channels and the VBIAS power supply.