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Hi firstly I am new here and would like to say that I am more of a hobbyist than an expert in electronics, However right now I am working on a phantom powered electret microphone for use as a direcional mic. The design of the mic amp is not mine, and is in a way a balanced output and is powered via the mixer phantom power system. I have found how e
Hi, It may work, But I'd rather use a single part called " high side power switch, active low". Besides the desired function in a single tiny device, it additionally includes overvoltage protection, overcurrent protection, over temperature protection. And usually cheaper. Just do a search at an electronic parts distributor. The provide in
As per page 32 of the attached?. ?Switch Mode power converter compensation made easy ? by Robert Sheehan ?.if you design an SMPS, and you compensate its feedback loop such that it is stable with an output capacitance of C1, say, then obviously it is stable. Now add another capacitance to the output, call it C2?add C2 downstream of C1. Now
Hello everybody, I have been trying to simulate the design of a CPW using HFSS and I would like to analyse a little bit more the losses mechanisms in the simulation. For that I have been trying to compute the losses due to the finite conductivity of my metallic electrodes (defined as volumetric objects and allowing the solver to solve inside of
No guarantees of course but I would guess it would work over quite a wide range. The lower limit is usually decided by internal gain dropping due to capacitors in the silicon, the upper frequency by the limits of internal transistor parameters. As a guess, and that is all it is, you could get it to work from around 20MHz up to 500MHz with (...)
just a note, most electro's are self resonant from 50 - 100kHz, i.e. above this they are inductors, they provide bulk storage for low frequencies only, if the Vicor sw freq is 750kHz, then the ripple could be 2x this - no electro will filter that ...
Hi, How do I get the impedance vs frequency (fig 2.32a) plot of page 33 of the attached in LTspice? The LTspice sim is as attached, but I cannot make it work and cannot get fig2.32a I can get the transfer function plot (fig 2.32b), but not fig2.32a. I am jus
but wouldnt the cap with no esr placed in series with it, partially short out the esr that had been placed in series with the other one? Partially, yes. You need to calculate the total ESR of the C-RC combination at 11 kHz. A slightly higher resistance value, e.g. 20 mohms could be necessary - if the capacitor ESR is actually
I had posted about this a couple years ago but never followed through because I found a source of more transmitters for the frequency I was looking for. Now I'm in need of having to convert again. I mapped out the markings on the components of the 433 vs 315 board and found all these differences. Some of markings on the little beige components a
that looks wrong. why does rvalid go low when rready is low. why does rdata change when rready is low. rvalid later transitions low without rready. it's highly suspect that these valids are changing after ready changes.
R7, at 12k, is way too low ohmic value. Please tell what is R7?...what package and power rating? Also, what is your Z4 could be overvoltageing your TL431 if its too low Also, what is your transformer turns ratio...remember that "V referred to pri " is "vsec * NP/NS" Do you know how to work out the polarity of a flyback tra
I have a lot of difficulty understanding certain functions and understandings of CST, I know frequency, reflection coefficient S11 and transmission loss But the image below shows what I doubt. If anyone has material that talks about each point it comes to each function. 157915
What is ng ? What are the purposes of Ctrl0, Ctrl1, Ctrl2 and Ctrl3 ? 157929
Dear all, Hope everybody is fine. I am interested to design a power amplifier for RFID applications (frequency ranging from 7MHz to 9MHz). For the said purpose i had designed PA by using MOSFET but now i am interested to replace MOSFET with CMOS Transistor. But unfortunately i am unable to decide which part number's transistor is suitable for the
Hi, I am looking for a converter to transfer the mechnical energy from bicycling pedal to the electrical energy. Here is the application: 1. the tire of the bicycle can move ahead around 1 meter per second, that is the input of the mechnical energy 2. I am trying to charge a battery that is 3V and 500mAhr capacity. That is where the output ele
Yes, an ordinary meter will measure voltage up to its maximum frequency. Typically for DVMs that will be a few KHz. You can rectify the signal and measure the resulting DC, this is how "field strength" meters work and the frequency limit is then decided by the physical properties of the signal path and the rectifier. F.S (...)
In the data sheet of a 400 MHz transistor I found fall time = 60 ns. Clearly these are contradictory specifications - trise and tfall should be at least an order of magnitude shorter. Should I believe that fT is specified correctly? (e.g. 2SA2088FRAT106Q transistor).
Hi, The cable seen at 4:50 of this.. 100m long. Since it comprises "go" and "return", the inductance of the coiled up cable on the winch will be very low. Do you know a formula to calculate this? 1...for twisted pair cable 2...for side-by-side cable ..or just a rough estimate of the co
@volker Thanks. But I found the following box resonances using your model By the way, did you use the "Draw Polygon" feature instead of "Draw Rectangle" (which is what I used) (blue curve) shows some phase deviation from S15 (red curve) which is what the butler matrix is supposed to do.
Hi, In most cases fc = 1 / ( 2 Pi R x C) applies. R3, R4 act as a voltage divider, thus for C2 2.55k applies. Choose fc to be very low, much lower than 10Hz. C3 should be tge same as C7, with 470k as resistor for fc calculation. Fc should be lower than 10Hz. C4 and R8 determine the upper cutoff freqyency of the signal. The (...)