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136 Threads found on edaboard.com: Switch And Cap
its just sparking from inrush current getting interrupted as the contacts make and brake repeatedly (bounce) as they come into contact. Its normal...if you want to get rid of it, use an ntc, or a zero cross detector and switch it on at the mains zero cross. Or try and make the input cap smaller. (...)
Hi, I can't find any true storage coils. A breadboard is not suitable for testing high frequency switch mode power supplies. It may work or not. One simply can't fulfill the PCB design rules given in the datasheet. Klaus
Hi, There are circuits called "ideal diode". Maybe this is a good way. Or measure all voltages and select the highest one with a cmos switch. Klaus
Hi Everyone, I would like to understand, what is actually causing ripples at the output of LDO design whenever there is a current switching, etc 0 to 30mA ?. In my test simulation, i'm including a ideal current source to switch from 0 to 30mA and the load cap about 100pF. I'm seeing the output (...)
Hi everyone :), I'm new to this forum and working at the moment on my first analog design (thesis). As I'm designing a Low Power Relaxation Oscillator I have some troubles applying the trimming feature. When I connect my MIM-cap directly to the charging node everything is fine (good TC). After introducing DNW-NMOS switches to trimm the (...)
I suppose the pre-insertion switch S1 is closed before the DUT Q1 will be inserted, after this will be opened. This serves that the DUT's base potential initially is at GND, so the DUT cannot get destroyed by an initially possibly too high voltage from the charged cap(s) C1 and C2, if R8's tap wasn't at GND before. After opening the (...)
in a fully differential switch cap integrator the output common mode is set by a switch cap common mode feedback circuit. the theory of this can be applied in various ways. basically apply charge to a cap and switch the cap into your high impedance node. (...)
Hello, I need a cap for this type of pushbuttons. Can someone please help me, where can I get it, or is there any 3d model ready for 3d printing? cap must not be too thick in diameter (about 4mm or so) and at least 10mm hight. It is urgent, I need
If your antenna had a built in resistor to ground, say 10k, it would be simple to have a 1~10M pullup and cap for low current to activate a P-ch MOSFET high side switch to de-activate the circuit, then activate when antenna 10K to ground without degrading the RF. PC's use the same method to detect a speaker connected (<100 Ohm) (...)
It was good that you used a short probe ground. I wonder how long the signal path and ground return is for the 0.1uF cap to supply. Let's look at the ringing on the signal closely. The overshoot is ~33% at a 1/2 division of 400ns/div= 200ns or 5MHz . We know there must be a 2nd order LC effect. At 5MHz , 0.1uF is 300m The impedance at 3.3M
IS this for models or real bus? - - - Updated - - - 60W or 60V surge @ 1.2A is too much wasted power for a 3V LED strip. Can you not use cap to hold up voltage during dump spike and open 100V rated switch or use LC filter to attenuate spike to MOV?
Diode in reverse only works when diode is across motor to supply , V+ for both low side switches. otherwise diode across motor to gnd. for high side switch. Then driver is protected for Vmax and diode current rating must match driver for continuous current. Small cap across motor may reduce EMI. Current will be limited (...)
A similar R/CR diode structure is built into every input. See ESD protection current. Ensure switch is isolated from finger discharges to signals with 15 mm clearance for 15kV isolation. Do you want cap at 0V on power up then pulled up with switch to ground and power up closure? DOes it have software controlled pullup on (...)
All switches have a series resistance and the parallel capacitance determines a break point in frequency response and phase begins to shift one decade below this. The ratio of ESR of caps to switch RdsOn also affects gain reduction as you dump the capacitance. Ceramic (...)
I created the circuit in Simulink but I also to do it in Micro-cap? So I need to use some switch in Micro-cap. Which one I could use instead o Simulink switch where the defining signal go to second(central) input, and depending on true or false it pass the signal of 1 or 3rd input?
Hello, I am designing a circuit which shall turn a device ON or OFF by blowing on it. I have a circuit in the form of a counter where in when a switch is pressed, the count is incremented, and i have the relay connected to the LSB of IC 4017. So each time i press a switch, the LSB turns from 0 to 1 or vice-verse and this (...)
Don't use ceramic caps, they have a memory effect. Use a small film cap for the S&H cap. You can work out the RpC leakage rate for sag and RsC capture rate for sample and choose values according to speeds, noise and rates required. Analog CMOS MUX switches (...)
You should always use a non-polar plastic cap for an integrator. You can achieve longer time constants with small values using 1 to 50M for a 0.5sec time constant with bias current devices and a dump switch, if required.
You need way, way better than 1MHz BW for that fast of a conversion rate. I'd suggest that you think of track/hold rather than sample/hold (the latter implying a shorter sample window to me, short window makes the settling time a greater problem). Depending on the loading of the "S/H" you might have a bare cap and switch, or need a (...)
In fact to discharge the 1000uf capacitor, - - - Updated - - - i have another question, if i want to connect a transistor as a switch in series with the LEDs, do i have to take care about the voltage across it ? because you said we have 322 V open circuit, and what is the requirment for this transistor ?