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Hello,
Can anyone explain why a 100 Ohm resistor is added at the Op-amp output of the attached circuit?
This circuit take a variable input voltage between 0 and 3V (DAC) and output a higher voltage range to control a module.
Thanks,
Ballimo
I have sent an email to the technical support (of the DC-DC converter manufacturer), he reply as follow:
the noise coming out of the input would be common mode and a single inductor may actually make the noise more difficult to manage; he suggest using input bulk caps with low ESR at the...
Hi Everyone,
is it a common practice placing an LC filter at the INPUT of a non-isolated buck converter to reduce reflected noise? does LC filter add any problem?
Regards,
Ballimo
I am not familiar with Relays, but I was reading that when you remove the voltage that was applied to the relay coil, the magnetic field collapses and creates a reverse polarity voltage for this reason you need a reversed biased diode across the coil relay.
I was wondering if "Deenergized...
Hello ALL,
I am using a Single side stable Relay "TX2-12V" From Panasonic ; The datasheet shows the Direction indication as : (+) for pin 1 and (-) for pin 12 , (Deenergized condition); Please check snapshot above.
The nominal coil voltage is 12V, should I connect 12V to pin 1 and ground to...
there is no minimum for aspect ratio, the question is what the maximum aspect ratio a fabrication house can achieve; in other word what will be the minimum drill size for a give PCB thickness..
one of the fabrication house capabilities is the maximum aspect ratio they can achieve: per example...
Hello guys,
I'm using a voltage monitoring IC that monitor a DC voltage up to 80Vdc. this IC came in DFN package (please check attached)with a pin to pin spacing of 0.25 mm. I will be using conformal coating over assembly to withstand the 80Vdc with 0.25 mm pin spacing.
My question is: does...
Dear All,
I have imported a Differential trace into CST MWS, and I am using "Time Domain Solver" to get S-parameters and TDR measurements; the Problem is that we are getting wrong results.. we have used Polar software and the impedance is 100 Ohm differential.. but the TDR in CST MWS show a 3...
CST Microwave Studio Differential Microstrip Transmission Line
Hello All,
I am new to Electromagnetic simulation; I want to simulate a Differential Microstrip transmission line to know if there is any impedance discontinuity and have some Questions:
1- I am using waveguide ports, is there...
the Value 21.3A you calculate is the continuous DC current, or the pulse current for t=10s ? I did not find anything in the datasheet about that
Thanks
Hello All,
I am using the N-Channel 40-V (D-S) MOSFET Si4154DY From Vishay Siliconix; the datasheet confuse me, I need to now what will be the continuous current (DC current, not pulse current) allowed. can any one help me to find this in the datasheet? I know that this will depend on the...
Thank you Frank for the answer,
By "DC filtering of the oscillators" do you mean DC filtering inside the oscillator package?
only 155MHz and 311 MHz are related closely in harmonics, please correct me if I am wrong; using a ferrite bead and feed through capacitors are only needed for these two...
Dear All,
I have 4 Crystal oscillators with a supply voltage of 3.3V; the output frequencies of these oscillator is : 155 MHz, 311 MHz , 644 MHz, 100 MHz.
I have used a Linear Regulator to supply the 3.3V for these oscillators; My question is:
should I use a ferrite bead for each VDD pin...
Hello All,
I buy a center tap transformer, it has a sticker attached where it is written:
6V 0.5A and a part number. I have to question:
1- 6V is the rms voltage, right? and it means that the transformer is 6V-0V-6V, so if I only use the 2 terminal of the secondary (without the center tap) I...
you can do that, the only condition is to have a DC charge voltage higher that the battery DC voltage; you can download the battery datasheet where you can find the charging characteristic. NOTE: you will also need to add some circuit monitoring for the battery, to prevent overcharging...
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