1000 Threads found on edaboard.com: Reduce
this would end up saturating core with large currents due to any DC content if not symmetrical.
INterleaving cycles also cuts starting torque by duty cycle.
VFD's use low ESR active switches to drive the motors with PWM half bridges to make pseudo sine waves to reduce Eddy current losses.Then 3 phase gives smooth torque at wide speed ranges.
Show your DIY :: 08-14-2016 21:57 :: SunnySkyguy :: Replies: 13 :: Views: 2801
You would have to route the source clock from the pad to the center of the chip, and that is not desirable.
Think about the net delay.
If you can place your design near the PLL and that would reduce clock net delay significantly.
Whereas if your PLL is somewhere at the center of the chip, and say you place your logic also at the
ASIC Design Methodologies and Tools (Digital) :: 08-12-2016 08:17 :: dpaul :: Replies: 3 :: Views: 576
Using EET I derived the following symbolic expression
C1*C2*C3*R1* (R2 //R3//RL)
I know that the expression reduces to this
C1*C2*C3*R1*R2 (RL //R3)
I don't know where to begin to reduce my expression to get the final answer. Can anyone help me? Are they identities to apply? Please point me to any reference material t
Elementary Electronic Questions :: 08-05-2016 13:15 :: Souljah44 :: Replies: 1 :: Views: 350
There is a mathematical solution, if you are interested , by computing impedance of LEDs and caps.
Also LEDs would benefit with a diode bridge after the triac to give DC instead of half wave rectified by LEDs to reduce flicker when on.
LIght dimmers often flicker on LED lamps not designed for this and need a small tungsten night light or load
Power Electronics :: 08-05-2016 01:01 :: SunnySkyguy :: Replies: 8 :: Views: 2160
In order to improve our prototype, quick-turn, small-medium size manufacturing lead time, and also help to reduce our company's manufacturing cost, a more than 4,000,000 RMB cost of laser direct imaging (LDI) equipment has been introduced recent successfully, and it's under in-house operating right now.
When this LDI passed our trial period suc
Business, Promotions, Advertising :: 08-03-2016 06:59 :: darrenyang20085 :: Replies: 0 :: Views: 43
I don't understand the problem.
It's a high side current sensor using differential Hall sensors to reduce stray magnetic effects with a single supply for unipolar DC current using a ratiometric supply reference added to the output to avoid the converted signal inside being near ground.
It is digitally compensated for linearity and tempco.
Analog Circuit Design :: 07-29-2016 23:09 :: SunnySkyguy :: Replies: 27 :: Views: 2103
Can you make a 50mV current shunt and scope current symmetry? especially harmonic content.
Saturation will reduce inductance, increase di/dt for the same voltage and be asymmetrical if there is remenance.
50mV/20A=2.5mΩ, a short pc. of wire calibrated.
using shielded twisted pair of magnet wire on the neutral side to a diff Amp with a
Power Electronics :: 07-28-2016 21:09 :: SunnySkyguy :: Replies: 8 :: Views: 628
It is easy to reduce noise say on 50mV SMPS ripple using LC filter to desired level combined with PSRR on chip.
CM and DM ferrite beads can also reduce ingress on high impedance inputs, if the layout causes crosstalk.
I have used SMPS for video amplifiers and AMLCD bias without noise effects, but with care.
In this case I stepped down 9V to 5V
Analog Circuit Design :: 07-26-2016 11:16 :: SunnySkyguy :: Replies: 6 :: Views: 486
For 1kV with fan cooling and dust accumulation creepage or leakage discharges with high voltage can reduce from 3kv/mm on a surface to 300V/mm or worse. Therefore for longevity they prefer air gaps between HVAC and LVDC using air slotted gaps.
But you have HVDC which requires more care.
HOw much of the board will have 1kV distributed around it?
Power Electronics :: 07-23-2016 20:51 :: SunnySkyguy :: Replies: 2 :: Views: 361
A 40khz squarewave has harmonics at 80kHz, 120kHz, 160kHz and many higher multiples. An RC lowpass filter can be made with one series resistor then a capacitor to ground and it can reduce the harmonics a little but the filtered waveform will not yet be a sinewave unless many RC filters like that are used, but then since the circuit has nothing acti
Elementary Electronic Questions :: 07-22-2016 03:51 :: Audioguru :: Replies: 7 :: Views: 978
With an inductor on the input side you will reduce the input ripple current, but lower the (loaded) capacitor voltage.
With an inductor at the output side you may influence the voltage to the load in a way that the load will refuse to work. (depends on load). But you won´t decrease input ripple current significantly.
Power Electronics :: 07-21-2016 15:09 :: FvM :: Replies: 10 :: Views: 1989
I tried to synthesize a 64-bit adder. It's pure combinational. When I set the virtual clk to 1GHz. The timing report is
clock vclk (rise edge) 1.00 1.00
clock network delay (ideal) 0.00 1.00
output external delay -0.10 0.90
data required time
ASIC Design Methodologies and Tools (Digital) :: 07-19-2016 15:44 :: ammmmlol :: Replies: 9 :: Views: 2193
Simple 1st effects are:
from Ic=CΔv/Δt or
Δt = CΔv / Ic
thus for Δt = 100 ns, C= 10 uF , let ΔV = 1 V, Ic= 100 Amps.. Is that what you used?
Also Consider ESR of 10 uF will have ultra low ESR*C product of 0.1 us best case and more likely 1us. Which do you have?
So to reduce Δt, now you can see the 1
Analog Circuit Design :: 07-12-2016 22:33 :: SunnySkyguy :: Replies: 7 :: Views: 561
HFSS is notorious for needing lot's of computer resources. In some cases you may be able to reduce the detail in your model. Usually that is not the case. Symmetry planes may help a bit but you probably want a bigger computer. RAM is your friend. So are more cores.
Electromagnetic Design and Simulation :: 07-11-2016 22:19 :: Azulykit :: Replies: 4 :: Views: 750
Is it between one TX and multiple RX or multiple TX and one RX. Which power are you referring to? Rf power?
The datasheet reference manual has the details on how power can be reduce through operation mode.
RF, Microwave, Antennas and Optics :: 07-09-2016 11:04 :: ahmed-agt :: Replies: 1 :: Views: 536
To get max power out of the device, you will have to excite it with an AC wave of 140V peak to peak (see post #2) at 40kHz. The output power has not been specified. It may be wise to reduce the max voltage by about 20% to leave some headroom. That will reduce the output power but that will depend on the nature of the coupling.
RF, Microwave, Antennas and Optics :: 07-08-2016 17:51 :: c_mitra :: Replies: 2 :: Views: 420
Most likely you have a large common mode noise interfering with a differential current source, sense.
Try a large CM balun or ferrite sleeve or twin coupled choke to the twisted pair to raise CM impedance and thus CMRR but keep DM impedance relatively low compared to Zc(f)
If that fails, reduce area of loop with a smaller gap . water has a diele
Hobby Circuits and Small Projects Problems :: 07-08-2016 02:35 :: SunnySkyguy :: Replies: 3 :: Views: 487
You'll notice that transmission lines of given impedance can be easily scaled in dimensions. If you have already a correct calculation for one substrate height you also know the results for others.
If you are stuck to a thick substrate you might consider coplanar scrips with to ground to reduce the trace width.
Electromagnetic Design and Simulation :: 07-04-2016 12:17 :: FvM :: Replies: 5 :: Views: 761
If you have any explanation, Could you please provide me?
scan chain length is proportional to the number of flops in your design. the number of test vectors is proportional to how complex the logic between flops is. compression can reduce the number of test vectors, but it will not alter the design. so th
ASIC Design Methodologies and Tools (Digital) :: 07-04-2016 15:54 :: ThisIsNotSam :: Replies: 4 :: Views: 762
Almost any electret microphone will work up to around 50kHz. Knowles make a number that are characterised beyond the normal 10kHz. Just put a high pass filter after it to reduce lower frequency audio. An amplifier may be needed as well. You can then process the signal however you like.
Look up bat detectors to get plenty of ideas of what you could
Microcontrollers :: 07-01-2016 10:47 :: G4BCH :: Replies: 2 :: Views: 3195