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167 Threads found on edaboard.com: 100 Khz
I2C speed is actually limited by the bus capacitance, although "cut-off frequency" isn't the usual term.You find respective calculations in the I2C specification by Philips/NXP. Due to the fact that the specification has fixed speed limits of 100/400 khz, bus capacitance isn't a problem for usual applications. SPI can be implemented with impeda
The superimposed noise will be noticed in the signal processing chain, whatever it is. Saying you have input signals with 1 Hz respectively 100 khz isn't much information. What's the effective bandwidth of succeeding signal processing? What's the spectral distribution of the noise? Can we expect white noise? Many technical noise sources like amp
Hi. What performance difference is to expect using a ferrite rod or an iron rod as wound transmitting antenna under 100 khz ? Would ranges be way different at a given -say 1 Watt- TX power, or not of major concern to reach 100 m distance?
from which point you are extracting the signal strength voltage ? after detector or any other? How did you measure it as 100/200mv?
Do you know if there is any kit or board modules in the hobby market to put together a pocket transceiver around 100 khz ? Voice modulation, range does not need to be greater than 100 m. Sort of a walkie talkie. Its antenna needs is not of concern.
I picture one operating at 99 khz, the other at 100 khz. Sometimes they act in unison, sometimes they are interleaved. I think the output is the same, for theoretical purposes. In practical terms interleaving has an advantage, because it reduces incoming current ripple, reduces output voltage ripple, and allows smaller filter capacitors.
Hi all I have a question about spread spectrum and its use with PLL synthesizer Let's say I have a clock source that is generating 100 MHz clock with 5000 ppm down spread with 33 khz frequency modulation profile. Thus, the minimum and maximum frequency from this source is 99.5 MHz and 100 MHz, respectively. Then let's say I have a (...)
Your frequency calculations are missing important points like relation of switching frequency and losses. Don't expect that you will make a buck converter with good performance an > 100 khz switching frequency. But you can try, surely instructive. Once you think about, you'll also notice that it's effectively impossible to achieve continuous pul
I see that you decided to build your own discrete SMPS controller. Which is supplied by a 4 volt regulator. Which means that at M1's gate, you'll have a driving voltage of about 3 volts.....Will M1 be fully enhanced with such a low gate drive? Also, you don't mention switching frequency. But if you are switching above 100 khz, X17's slew rate of
5 kV/?s at 100 khz sounds like a square wave. What's the actual voltage? As schmitt trigger mentioned, switching speed of triacs is several orders of magnitude slower than 100 khz. Limit switch spped doesn't necessarily exclude slow switching of high frequency signals. But a triac or SCR won't latch any more at (...)
microphone preamp will typically have a 20 khz lowpass filter built in, so you can only use it if you know your mixer output will be below 20khz. A typical balanced microwave mixer will have 100 mV Peak output when the LO port is driven by +10 dBm, and the RF port driven by 0 dBm. IF you drive the RF port with less power (as in a receiver (...)
I am testing a high frequency inverter PCB running at 100 khz. When I probe any node, for example DC Link voltage, load current etc. there is a lot of noise superimposed on the actual signal. The noise is simply switching spikes picked up by the probes but not actually present. The on-board ADC seems to read clean signals, but the scope displays e
The 100 ohm burden resistor should be placed after the bridge rectifier, not directly across the CT. That will eliminate all the lost voltage and linearity problems created by the diodes, provided the magnetics of the CT are up to the job. Specifying inductance is not enough. The magnetic core must not saturate with the total applied voltage, w
On page 3 of 3C90 data sheet Fig 6, "specific power loss as a function of peak flux density with frequency as a parameter". The graph is based on 100 Deg C temperature. What can i do to find the curves at 70 Deg C. Specifically i am looking for the Pv at 48.3 khz and 1600 Gauss (160mT) at 70 Deg C.
Could you please tell me if i connect driver IR2112 to the IGBT IRG4PF50W inorder to make high frequency 100khz inverter circuit to give AC voltage to induction furnace with resonance 10 khz (1.5 micro farad, 190 micro henry and 5 ohm) thanks eman
I am new in electronics. I would like to have a 5Watt sin generator with a variable frequency between 100 khz and 10MHz. I am not sure in which direction should I look for. An amplifier +wave generator? AC inverter? I am searching for a cheapest and simplest solution.
Hello I have any question about signal sampling theory. I have signal generated from DDS (10bit with good reconstruction filter) , signal is sinus of known frequency 100 khz. I need to know as precisely as possible amplitude and time zero crossing I have 12bit ADC with 5 MSPS (STM32F303). i.e. 50 samples per period or 1 sample/7,2 degree. Th
Hello All. I ordered a transformer for 48V input and 330V output. I want to know whether the provided values of the primary and the secondary inductances are okay or not? My primary current can go upto 21A. And the switching frequency is 100khz, 1000W. Attached is the document for the specs from the factory. Also I want to know that if the (...)
Carrier frequency of the shown power line remote control is 100 khz rather than 315 MHz. But the coupler could be basically designed similarly. You preferably operate the transformer in resonance. Air core or open ferrite core with a very few windings. I presume you know basic LC resonator formulas (or can review it on the internet). 315 MHz is
Hi, I am just in the process of understanding the best way to use my ATMEGA328P in low power mode. Currently it runs constantly at 4 mhz with an external crystal. The system runs the i2c at 100 khz and usart at 9600 baud. So am I correct in thinking, to swap the 4 mhz external crystal for a 32 khz and put the micro to sleep when (...)
So if I were to change the switch to the positive line, will it it be suitable to filter harmonics at at 100 khz with this configuration? That's in fact much better. You should check if the filter behavior is acceptable with the load transients in your circuit. The about 1 khz cut-off frequency of the LC low-pass might cause heavy
Consider that these "intelligent switches" are performing slow switching to reduce EMI, so pwm frequencies should be moderate, e.g. a few 100 Hz up to 1 khz. And there should be a freewheeling means for inductive loads.
A simple method is a darlington arrangement of transistors. If each transistor has 100 gain, then this provides total 100 x 100 x 100 gain. You'll need very high gain to measure resistance of rocks. The bias current goes through the rock. Whatever there is, it is amplified. ob
The topology is LLC converter. It's variable voltage conversion factor relies on varying the switching frequency (or tuning the resonant circuit, which is obviously not possible with this circuit). It's effectively impossible that circuit works with 100 khz fixed switching frequency.
The question is somehow boundless. "Wireless energy transmission" refers to short distance magnetic coupling in many cases, respectively it achieves high efficiency at low frequencies (100 khz range).
When I designed a VLF antenna , I just used a 2m whip antenna, of course longer the better. Then I used low noise FET front end with 2 stage 5deg X cut Xtal resonator filters and a PLL. I used the US Navy stations from Norway to Cutler Main to Hawaii for navigation. The lowest common denominator was 100Hz for each frequency which was used for th
hi The following are the design spec of a flyback converter given in the attached file (at page 13). VIN: 28 V Output 1: 5 V Full Load Current: 10 A Circuit Topology: Flyback, Continuous Mode Switching Freq, fs: 100 khz Desired Duty Cycle: 0.5 at 28V input Max Ripple Current (delta)lpp: 5 A @ 32V (secondary) Peak Short-circui
Hello, i'm using HFSS to simulate a transmitter coil for Wireless power transfer (100 khz). My question is about the radiation box dimensions, it seems that when i increase its height the results shift quickly form the desired ones. However, i'm not sure how to choose because to get the correct values i have to make the box very close to the ant
In addition to what's said by Warpspeed about noise problems, I must confess that I'm unable to recognize from your oscilloscope wavefroms why you don't achieve 100 khz. The 3842 oscillator is free running, so you should primarly see 100 khz ocillator frequency at the RtCt pin, isn't it? But it's impossible to see if the (...)
You can use IR2110 to drive the MOSFETs of a 100 or 150 khz inverter. Please avoid cross postings and ask the wireless power transfer related questions in your own thread.
Which FCC rule are you referring to? The swiched mode converter inside the battery pack will surely use a higher operation frequency than 9 khz to fit the case with acceptable efficiency (e.g. several 100 khz). This shouldn't be a problem with state-of-the-art power supply filtering. On the other hand, a converter switching at 9 (...)
?COMP? is the result of comparing the PWM On current sense after a 1us RC filter. But you are modulating using a 332 khz switch or a 3us cycle, so your filter is 3T which does not reach 100% of Isense within one switch cycle and will be affected by boost duty cycle. Since 1T response is 63% of a step (=1/(1-e)) I am not sure yet how the cycl
Hello. I would like to generate 100 khz pwm signal with attiny26. Please, check my source code, I borow my ISP programmer so I can't do it. Thanks in advance. #include #include #include int main(void) { DDRB |=(1<
Use a fixed series resistor followed by a selection of shunt resistors, each being switched in by a CMOS transmission gate t(4066). This sort of arrangement can deal with 0 to +15V signals with a impedances of say, 100 ohms to 1M ohm ay 10s of khz Frank
Working at so high frequency I always put a ceramic capacitor near to the electrolytic. I'm not able to determine the expected effect of its inherent inductance at 100 khz, but presume it is not negligible.
dear all experts, please tell me how to make a frequency selection between 60 hz and 100 khz,user select able with minimum six band advance thanks for support rahul
you need to set the spectrum analyzer to a 100 khz resolution bandwidth. period. that is the spec. if they wanted it measured in a 30 hz bandwidth they would have written that as the spec. If you are having trouble with the noise floor of your spectrum analyzer, filter/null out the carrier, and add a 20 dB amplifier in front of the spectrum ana
That's impossible with standard (100 khz) and fast (400 khz) I2C data rate. So you'll hardly find any I2C AD C with similar speed, neither DIP nor SMD.
The transformer coupled output has a lower cut-off frequency of serveral 100 khz or so. I can't send khz signals.
Hey everybody! I wanted to simulate an antenna in Low Frequency (100 khz), and this is the construction of the antenna: 108019 the two crossed rods are ferrites. firstly, what is the suitable software for this purpose? I'll appreciate if anybody could help me out... Thanks
pls find a attached image.. pls give me idea of opto isolator of high frequncy.. freq=100khz I WANT TO DRIVE A MOSFET WITH A ISOLATING THE MOSFETS.. WHICH OPTOCOUPLER WILL BE USED..?? I DONT WANT TO USE PT.. PLS HELP
PIezzo are more efficient. Magnetic can be louder. frequency response of human hearing affects perceived loudness as does ambient noise. Lower f towards few khz may be loudest but higher can be noticeable and bounce off walls easier but less annoying. I used to use 7khz in an old office with 100 phones all with the same ring tone. So I (...)
I designed a high frequency transformer (100khz) for an inverter (12V/230V, 800VA). The leakage inductance turned out to be approximately 1uH. Now, although small (or is it larger than typical?), the reactance when referred to the primary turns out to be 600 ohms @100khz, This is 10 times larger than the load resistance at (...)
So you need 4.1 V X 55 = 225.5 V output? . At 100 khz a cycle is 10?S, so at a slew rate of .1V/?S, the signal would only get to 1V before the input disappeared. I would think a slew rate of 200V /?S would be more like it. What is the capacitance of your transducer? From this and the wanted slew rate you can calculate the capacitance charging
Skin depth at 100 khz is about 0.2 mm. You can derive a rule of thumb for wire gauge in stranded conductors. Secondly you have both skin and proximity effect. As a result, bundles of enamelled wire must be well stranded (also changing between inner and out layer in larger strands, like litz wire does) to achieve uniform current distribution.
@chuckey, 100khz crystal ? Not hear of one such @morshed005, please study the RC based oscillator graphs from the CD4060 datasheet. as R can be adjusted by having a 1K pot , in between two resistors. Suppose your R value happens to be say22K, you can have 10K on either side and have a 5K trimmer in between. it could be set for a to
Hi I am operating a dc-dc converter at 100khz. The input voltage is about 35V and current is 12A with ripple of about 8A peak to peak. As the ripple current is to be supplied by capacitor. I would like to know about capacitor sizing equation and also ripple current rating of electrolytic capacitor. Thanking you.
How would it be 100khz Bandwidth at 42khz center frequency ??? Is it 42MHz ???
Eigenroot, in your first post you have asked for a recommendation. For my opinion, an active filter seems to be appropriate. However, because of the required bandwidth (around 100 khz) you need an opamp with a unity-gain bandwidth (transit frequency) of at least (20...50) MHz. Such amplifiers are available - perhaps are current feedback amplifie
Hi thanks for the advice. the freq is 100khz the length is around 2000mm - 22 turns, inner rectangular area 10X14mm -air coil - I cant use magnetic core for this application - is there another way to improve the Q except magnetic core and litz wires? I have done it with air box and solved inside and also inside the coil itself what do you think is