差动探棒

It will spend a lot of money if both differential probe and active probe are needed. In case that conventional differential probe serves for an active probe, there will be some mistake when the measured target from ground had big voltage difference from oscilloscope ground. This DF-600 Differential Active Probe has a switch to select differential or single-ended mode and another switch to change measured voltage range.

The DF-600 Differential Active Probe is high input impedance and low input capacitance probe. It also support extremely high frequency bandwidth, and high voltage input

It is designed by three OP, namely two FET buffer OP and a low offset OP. Therefore, even long-term operation, the measured voltage will not drift. The voltage offset always approach to 0 volts. (USB power supply should be 5V ±2%). The following diagram shows the circuit of DF-600.