#Qucs current probe full

Two extra resistors of 10 MΩ (R3, R4) have been added to the inputs so these stay biased and the output remains at ground level when nothing is connected to the probe. Then after the simulation is finished you will be able to plot the response of that net to whatever stimulus was applied in your simulation. There doesnt seem to be any way to tell the transient simulation where to 'probe' things in Qucs. D3 and D4 protect against wrong polarity, they’re not meant for rectifying an AC voltage! LEDs LED1 and LED2 indicate both power supply voltages are present, and the probe is active. I made a new post with a screenshot in AskElectronics.

#Qucs current probe full

A symmetrical laboratory power supply can be used or a small transformer with full wave rectifier and smoothing capacitors. The probe has its own voltage regulators and a common mode choke to suppress possible interferences from the DC power supply used for the probe (think of SMPS versions). Input voltage range is limited by the +/- 15 V power supply (onboard regulators), a little over +/-12 V. Qucs, secondly to indicate the limitations of the current SPICE to Qucs netlist conversion process, and nally to present a preview of how Qucs is likely develop in the future in the area of SPICE netlist compatibility. Although the AD8421 has very robust inputs, long overvoltage conditions should be avoided. The input filters (R1/C1, R2/C2) provide a simple overvoltage and transient protection for short overload conditions and correct the increase of gain of the AD8421, close to the cutoff frequency, to straighten the amplitude vs frequency characteristic of the probe. Have a look at the datasheet for more information. Even at a gain of 100 bandwidth of the AD8421 is still 2 MHz. Bandwidth at this gain is greater than 6 MHz, measured bandwidth is about 8 MHz. The amplifier is configured for a gain of 2, set by a single resistor R5: G = (9.9 kΩ/R5) + 1. Instrumentation amplifier AD8421 is used for its high bandwidth. The maximum primary powerline current is 350 amperes from DC 400Hz. The RF current range is 50 amperes CW and 100 amperes peak pulse with a duty cycle of 0.1. A typical calibration curve is shown below. The useable frequency range of this probe is 10kHz 500MHz.

This current probe has a differential input and single ended output. The F-52 is for laboratory and field testing. Differential current probe with single-ended output, +/-18 V supply voltage, 6 MHz bandwidth, and gain of 2, set by a single resistor, can be increased.