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You don't necessarily need an amplifier to use phantom supply for an electret microphone. You can also make a simple pseudo-differential circuit, using resistors and capacitors. If you are using an amplifier similar to Fig. 6, I don't recognize how it should change the frequency response. R8 of 2k2 however reduces the gain almost unity, hence th
What is ng ? What are the purposes of Ctrl0, Ctrl1, Ctrl2 and Ctrl3 ? 157929
yefj, you have basic problem with understanding what common mode feedback does. It has no connection to mismatch of currents, CMFB sets/tunes both currents in a way that the main OPAMP will operate in the normal active region, it sets all transistor pairs of the differential circuit to the same desired operating point. If the currents have mismatch
Hi. I'm using ultrasclae+ . I want to use the xapp1315 in my design for 1:7 deserialization. In Xapp1315 design file, an external clock is used to enter the fpga through IBUFGDS. 157818 But in my design, there are many other logics, so xapp1315 design can not be top file. The main problem is that I have only
2. There's no simple method to add a readout to float-type flowmeter (rotameter). Most economic flow meters (I doubt you find cheap sensors with suitable precision) have thermal or pressure drop operation principle, also some simple turbine flow meters are on the market. Depends much on the intended flow range, precision, gas type. For some appl
Why not review the respective standards? In a short, they are all using 100 ohm differential termination.
This is not Class-AB Amplifier, it's just A-Class Cascode Amplifier.It's very well explicitly seen that from PAE curve..%25 ! In additional to that, AB-Class Power amplifiers' Transistors are driven differentially so there are two Transformers ( or equivalent ) at both Input and Output. Each Transistor has Less Than or Equal 180 degree of Current C
I saw it in a data sheet of an Analog Devices MOSFET-input precision op amp. Has anyone tried to use such an op amp, so you can tell me if 1 ?V voltage offset is true?
Who has experience using tube preamps? How often did the tube change? What problems did you encounter? 157611
To probe the circuit with a regular single ended oscilloscope input, the 400V DC power must be supplied by an isolated source, e.g. a lab power supply, or possible a rectifier circuit powered by a safety transformer. The datasheet is assuming a test setup with grounded dc-, -339V is your imagination. A different question is if you can make me
You didn't tell what the differential probe is and how you have connected it. It's easy to get huge overshoot with inappropriate probing. In addition, it's not suitable to drive SiC-MOS through 20 cm of twisted pair. The overshoot will be so large that you may achieve partial gate breakdown of Cree transistors, showing up by increased gate leak
1. Which mixer to choose Passive or Active? Active will give much better noise figure, that is why so popular, consumption is not a trade-off if you need -110dBm sensitivity for the receiver chain. 2. Why they use Passive mixer for I-Q demodulator in case of impedance spectroscopy in many lite
I did not find a short circuit, but noticed that at the output of the voltage divider (R1, R2), instead of 2.5V, the voltage became 4.5V. On the LM258WYDT, this voltage was 2.5V. Perhaps there are elements on this input of the operational amplifier that should lift it? Reading the datasheet explains why. Input differential voltage i
... then I can say regardless the gain and accuracy different of the two circuits, the second one can adjust the circuit for more mismattching if happeining Yes, I'd think so, even if you perhaps wouldn't need the higher gain: the common mode gain of the diff amp is (should be) rather low, in the order of
Yes, if the output common-mode voltage is half way to its settling value it will be probably a disaster. That's why I mentioned in my previous post that if it settles to within few mV of its final value by the time the differential voltage had already settled to its full precision, it is most of the times OK. Yes, CM voltage can kill distortion per
Like others I'm sure, we constantly run into the limitations of our differential probes when looking at high CM slew signals like high voltage high side gate drive. What equipment do other people like for these applications? Are there better probes than what I'm aware of? Things I'm aware of: Example differential probe: https://www.
From what I see, you've got no phase margin - 0deg or even negative, not quite visible from the plot. Two comments. You have a fully differential amplifier but i don't see you using a common mode feedback circuit. So, most probably your amplifier is completely off. Can you check what is the DC voltage at the outputs of the first stage and at the o
It depends. On the interference frequencies to be filtered, the device power, etc. C1 47nF up to several ?F L1 is sketched as a common mode choke, common mode inductance 100 ?H - several 10 mH, differential mode inductance one to two orders of magnitude lower.
You want to read ds191-XC7Z030-XC7Z045-data-sheet and ug865-Zynq-7000-Pkg-Pinout to answer the question. The larger (676 pin) package has sufficient differential pin pairs, smaller (484 pins) only scarcely. Yes, only external PHY needed, special ethernet standards might work without PHY.
If your circuit following this one looks only at the diff signal and the common-mode spikes cause no harm, then it is ok. However, since this is targeted for a sample and hold, you have to make sure the signal differential and common-mode) has settled well within the targeted accuracy by the time you take a sample.


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