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1000 Threads found on Power Vlsi
Hi, 1. I would want to know what was the issue with the circuit in fig1 and how did it get resolved in fig2? Without the resistor the node is called "floating". (No predictable current flow through either diode) The voltage of floating nodes is undetermined. When you measure the voltage of a floating node you get unpredictable val
Not enough power to drive a mechanical relay though. Depends on the relay size. CT with up to a few W output are feasible. Sensitive relays switching 250V/10A have 0.5W nominal coil power, signal relays considerably less.
I'm trying to design a self contained DC bus power supply. Specifically it's for a 400v 2200w AC servo drive. Trying to get this all down on 1 PCB for simplicity. I've been using this drive for some time with just 240v mains rectified to 340vDC and some filter caps. The inrush current on charging the caps from flat is rather large, Which for a whil
Ridley is still very active and putting out new material. He has a Facebook power supply design group that you could join (I think - sort of a velvet-rope deal for many "interest" groups, so don't come all gimme-gimme). There has been a bit of progress in the last 7 years or so on every front. power devices, magnetics, topologies. New
if you have 2 equal currents 180 deg out of phase in a wire - the net current is zero - if there are in phase then the current is 2x - this is why knowing the phase relationship is important to an engineer ...! can you tell us the answer for 90 deg out of phase ...? if not learn vector addition ... for real power to be radiated
Yes, and there is an almost identical parallel thread ...with modified values. Apparently from the same course, but a considerably different problem. I presume that the solution can be elaborated based on the course material, which we unfortunately don't know. Thus the questions raised by KlausST should be answered. Show
It is your video so you should know! In truth, yes it will work but it will be very inefficient and the LED lamp will not light at full brightness. First problem: Stepping the voltage up by 145 times also steps the current up by that amount, example for a 6W LED lamp, the current from the battery would have to be around 5 Amps for it to reach ful
Hi all, I'm working on a design that draws power through USB but needs about 1.5A of current at 5V. Hence I'm exceeding the 500mA limit and need to "negotiate" a higher current from the source. I've read various pieces of USB documentation and I understand a small microcontroller would be the way to do this properly. I'm looking for a solution t
Hi, Regarding tethered drones such as the LIGH-T 4, which is rated at 1.2kW?. Do you know what voltage the BLDC motor inverters are likely to take?...presumably a lot more than a battery powered drone? Also, do you know what is the kind of power ranges that these tethered drones te
So, I transform the coefficient in integer value of max 17 bit (1 bit for sign) Why not simply treat the signal as 18 bit signed? If your original ADC signal is 16 bit, you'll use 16 rather than 18 bit signed. Similarly, the coefficient resolution will be demanded by the filter transfer function accuracy, not the multiplier width. A
Static CMOS comparators are not really good when it comes to Vio (t=0, and drift). That's why so many are clocked (that, and low quiescent power). If you were clever and had the die area and a handy clock resource, you could make a ping-pong comparator that zeroed one side while the other was real-time ("static"). High gain is the enemy of h
Hi All, I'm new to analog design. I need to design an 12V DC minimum 1 amp power source that takes input from 220V AC without using any ic component. I'm familiar with the transforming and rectifying. My only problem is I don't know how to design a steady voltage regulator. I'v looked up online but all of the designs uses ic components. Any resear
I'm designing a daughter board using OrCad Layout (old, I know). The board has 2 40 pin connectors at opposite ends. Both connectors have VCC net connections to the main board. The main board has the power supply and supplies VCC to multiple pins on each connector. I routed the board to use the closest VCC pin on a connector. The issue I am havi
How to simulate ACLR of designed RF Amplifier using ADS?
As the USB interface draws little current and will already have it's own protection at it's USB side connections, just draw power for it from the 5V and AMS1117. That is what most WROOM based modules do already. Take a look at the schematics for the various ESP8266 and ESP32 modules (NodeMCU etc.) and see how they do it, then move the programming
Can anybody please suggest me any resource on wireless power transfer coil design?
Those two new blue upright capacitors are probably unsuitable. I can see you folded the wire to make radial construction fit an axial footprint and the values might be correct but check they are rated for 105C temperature and are low ESR types. The wrong types will work fine for a while but nowhere near as long as the correct ones. Very often on
Hi I want to combine 8 loop antennas into one structure, each of them at a different angle to the others. By using 8 relays, I want to select each of these 8 loops so that I can null a signal at a wanted direction. So instead of using a single loop and a rotor, to use multiple loops and select each of them. Now the problem I have is that I have on
This has nothing to do with LEDS :) Many power converters are liable to saturate the transformer under unbalanced conditions, I am looking at a full bridge with a bridge rectifier output so there are plenty of oppertunities! The standard method to reduce the problem is to use peak current control. In my case I wish to use average current mode, a