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Can you make a 50mV current shunt and scope current symmetry? especially harmonic content. Saturation will reduce inductance, increase di/dt for the same voltage and be asymmetrical if there is remenance. 50mV/20A=2.5mΩ, a short pc. of wire calibrated. using shielded twisted pair of magnet wire on the neutral side to a diff Amp (...)
I recently used a shielded two core cable as temporary emergency patch for some instrumentation as I was out of three core cable, this in in a remote region of Africa . i.e. I twisted the shielding on the two core to use as the third wire. The sensor being connected to was a passive sensor sending a continuous low voltage DC signal of max 3v. T
I Assume your using a Ferrite Core for this transformer? Why not just use a few smaller diameter pieces of Enameled Magnet wire, twisted together to make your own Litz wire?
try a plastic 0.1uF cap ( low ESR low ESL) on output Also put ferrite choke around all wires to Pot prevent inductive common mode pickup from output stage. twisted wires help too as well as shielded wire..
Most likely you are seeing a different resonance at 2 MHz. A standard "twisted pair" power cable has about 0.5 ?H/m. Because inductance is a function of ln(center distance/wire diameter), you can't go much below this value unless you are using multiple wires. 1 ?F is a very small filter capacitor, I would expect at least several mF (...)
Hello, We wish to do a high side pulse transformer gate drive for Full Bridge SMPS with 400VDC input. We would like to wind the pulse transformer torroid with Triple insulated wire, but our volumes are too small to be able to buy any. Therefore, will it be ok to just use two strands of enamelled copper wire twisted together (bifilar) to (...)
The problem with RS-485 in full duplex is cross-talk from CM coupling of signals. To get good performance a ground wire helps absorb stray CM noise and a good CM choke helps even more. Data wires should be balanced such as CAT5 or twisted pair with proper impedance terminator matched to cable impedance.
Hello guys, I'm designing a board for communication between 2 instruments (and doing some other stuff) with these specs : wire length : Between 10m ... 30m (depends on the installation environment) Available wire/cable type : 2 wires of a simple 4x1 or 4x1.5 cable. These aren't twisted pair.The cable is (...)
wow that is nice :twisted:
twisted pair of wires if dimension of wire and insulation can have about 50ohms impedance: If you have this in mind? It may work for few cm of distance up to 1GHz if all electronics is in metal box.
I2C is typical "inter chip" bus, not designed for usage outside instruments. It will be difficult to achieve industry standard EMC across external cables and connectors. my thought was to use shielded twisted pair, do you have any other suggestions
Hi Peter, USB requires a shielded cable containing 4 wires. Two of these, D+ and D-, form a twisted pair responsible for carrying a differential data signal, as well as some single-ended signal states. (For low speed the data lines may not be twisted.) The signals on these two wires are referenced to the (third) GND (...)
The quality of connection between them determines the maximum length, speed and reliability, not whether it's wire of PCB track. There s certainly no 'router' in either configuaration. Normally the two wires are twisted together to minimize common mode losses and pick-up. You can run them as parallel tracks on a PCB but you will have less i
" bifilar coil (two coils wounded one behinds the other)"... A bifilar winding is when two bits of wire are wound as one, i.e. the required lengths of wire are loosely twisted together and the resultant double wire is used to wind the coil. If you have wound the bifilar winding properly, there will be a match of better then (...)
Hi, I would need a twisted wire pair in HFSS. Two round insulated wires diam 0.6mm twisted 1 turn per 10 mm and length for example 50 mm. This is like old twisted telephone wire pair. Has anyone drawn something like this? Regards Erno
Use a direct cable connection. Two wire twisted and shielded cable is preferred as protection from external interferences. The shield can serve as a guard, keeping external fields from coupling to the signal leads. The signal cable shield must be connected to the zero reference potential on the comparator side.
Welcome to EDABOARD any way you have to use 3 wires with ground as third. please manage to have a 3 way ribbon cable and use middle wire as ground. Also, try to keep minimum wire length. you might , i suppose, have used twisted pair . instead , use one twisted pair with second (...)
Full-Duplex RS485 requires 4 wires (2 twisted pairs). The DC resistance of a Cat5e cable is about 3 Ohm per 100 feet per wire, so you shouldn't experience significant voltage drop. 12V should be more than enough for a bunch of sensors, than just use a 78L05 to regulate 5V for your MCU. Depending on consumption, you might even be good with 5V (...)
Can I twist all the 3 wires together? I hope you can. Standard cables have the wires stranded in layers. If you buy a 3 or four wire cable, the wires are twisted.
See a basic intercom design in the attachment. It uses an AGC microphone amplifier, a headphone amplifier and an active hybrid circuit. Originally it has been using a shielded twisted pair with one wire utilized for the power supply and an additional beeper/light call sign. But these points may be adapted for your purposes. Also a two wire (...)