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101 Threads found on Power 1000
I'm not aware of any power quality/EMC standard that specifies a power factor requirement of 0.99. But you can "surely" name it? IEC 1000-3-2 applicable for single phase equipment specifies individual harmonic current limits rather than a total power factor.
1024 is because it is a power of 2. As binary numbers double in size each time you add a bit, the progression is 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2014, 4096, 8192. That means you can select all the addresses up to 8192 using 12 bits, if you used decimal 1000 as size multiple, you would not be able to reach all the addresses without ad
power is consumed by real impedances (resistors). V= Sqrt(P*|Z|) has no technical meaning, V = I*|Z| is correct.
Dear all, I need to feed a sample circuit with a number of random inputs (say for example 1000 input patterns) and then obtain a power trace (power consumed by the circuit during applying the input patterns). As the test circuit may not be small or the number of input patterns may be high, i don't want to use Hspice as it may take a long (...)
could you explain your data. You say it is a 2.4 GHz communication system, but you are showing power transmitted (or leaked) only from 10 to 1000 MHz. WHere is the plat from 2 to 10 GHz, for instance? You would need to show us your PC board layout, and any shielding you have, along with the schematic for the circuit. Most likely you cut the gro
HELA-10+ is way far to be a 3W amplifier in 5 MHz - 1000 MHz frequency range (see the datasheet picture). Perhaps is possible to make this multi octave PA using a complex multistage amplifier, but with huge compromise on efficiency. For a narrow-band 40MHz medium power amplifier I recommend to use a cheap 2SC1971 transistor. Check the net for tons
I presume it's o.k. for a basic power analyzer project to restrict the analysis to e.g. 9th harmonic. Using a higher sampling rate than 1080 is however appropriate. I'm not familiar with Arduino libraries but assume a higher timer based rate should be possible.
Hi, I am new to IC layout. I am finding it confusing to make a power MOSFET (NMOS) width 9.2mm width and length 1.6u. As per schematic simulation study. This seems to big to be drawn like simple nmos of small Width(um)and Length (um) Can some one point me to the right resource or give suggestion on how to draw this power MOSFET. Thanks
If the design is intended to comply with power quality regulations, it must not use phase control of electric heaters. Full wave switching has to be used to reduce harmonic currents. Review IEC 1000-3-2.
I am making a Class D amplifier that I am powering with a external 40Vdc power supply. I want to put in a power on LED, but the LED resistor calculator that I used said, "With a supply voltage of more than 24V, you'll dissipate excessive heat in a current-limiting resistor." Is there a better way to do a power LED using this (...)
We wish to design a electric car battery charger for connection to single phase , 230VAC mains. Therefore the maximum input current that we are allowed to draw is 16 Amps. However, this must be fused. The fuse must be rated 16 Amps or less for use on single phase mains. The maximum input current has to be at least 10% less than the fuse rating to
like they said, you have to solve this at the source, not along some 2" long trace. Start with bypass caps right a the chip that is making the signal. 1000 PF in Parallel with 0.1 uF, as close as possible to the power supply pin and the ground pin. that will keep the circulating ground currents to a minimum. If you do not have a decent ground u
The speaker output is designed to be a voltage source ( low Z) to dampen resonant load variations in the speaker from modulating the signal. Like in DC power supplies , we call this , % Load regulation, but in audio amps we use the inverse and call it Dampening Factor. DF values range from 50 to 1000 in high power systems. DF of 100 (...)
Many PID temperature controllers have an on/off output that you can program the time interval. For instance,if you program the time interval for 100 seconds. If the PID output commands 37% heating power, the output switches on for thirty seven seconds and stays off for sixty three seconds. This is often very useful for say a gas burner controllin
A cheap inverter has a squarewave output. The peak voltage is the same as the RMS voltage. That is why many electronic products do not work properly when powered by a squarewave inverter because they rely on the higher peak voltage of a sinewave.
There are allocated frequencies for "wirelesss" security video monitoring systems, I believe in the UK the frequency is 2.54 GHZ. I doubt if the official licensing power would give you such a range. Frank
Hi I am trying to find a high voltage DC power supply. What I am trying to do is to pole some PVDF - first form it in the shape of a rod, then heat to 100c+stretch+apply DC bias across it so that it shifts to beta form for the piezoelectric effect. I have been trying to find sources of high voltage DC for the same purpose. Unfortunately the
That circuit does not allow the output voltage to go below the reference voltage, V2 ( achieved when R7 = 0Ω). How are you going to power the op amp? The op amp polarity is correct as it provides negative feedback for the loop (due to the signal inversion of Q2). The loop will likely be unstable and oscillate due to the added loop gai
Hello, I got a problem that I dim power LED 4-7W/50V, but I wonder why my Transistor TIP122 is over heating. I measure the current Ic = 70mA and Ib = 1mA only. I also try change to other transistor but I still got this problem....:sad:
I want to do a comparison of power spectral density of BFSK,4FSK and 8FSK by using matlab baseband module "fskmod".Following is the code: M = 2; freqsep = 32; nsamp = 4; Fs = 64; x = randint(1000,1,M); % Random signal y = fskmod(x,M,freqsep,nsamp,Fs); % Modulate. ly = length(y); % Create an FFT plot. freq = ;