1000 Threads found on edaboard.com: Reduce
But the coil will have interwinding capacitance and a Self Resonant frequency, so you will care and what frequency you choose and what losses you have.
Skin Effect losses increase with frequency. Ferrite core losses increase with frequency
But coupling losses reduce with rising frequency where the gap must be < diameter and gap losses reduce with
Power Electronics :: 10-02-2015 20:42 :: SunnySkyguy :: Replies: 15 :: Views: 1127
Putting enough decaps on the node connected to the pad (internally to the chip) should help improve the PSRR. Maximum number of pads you can have depends on how many you want to allocate. Typically, I have seen 3-4 bond pads being tied together to reduce the inductance.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 10-02-2015 05:42 :: AMS012 :: Replies: 1 :: Views: 570
It means the difference frequency is being filtered out.
If you use the XOR gate Type I mixer, the capture range is strongly affected by the BW so lag/lead C-RC filter is used.
YOu can also use dual BW in the loop to change bandwidth from fast lock (high BW) to (low BW) in order to reduce jitter once locked on.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 10-02-2015 04:53 :: SunnySkyguy :: Replies: 11 :: Views: 1165
A ferrite bead won't do. You need real storage inductor to reduce the current ripple to something like 30 or at least 50 percent. Ends up with an inductance of about 1 mH for the given parameters.
Power Electronics :: 09-30-2015 08:00 :: FvM :: Replies: 3 :: Views: 656
emergency landing of the quadrotor in case of a failure of a propeller.
You'll want the craft to descend slowly. To ensure this you either need to (a) install an altimeter, or (b) spin the propellers at an rpm which you determined (by previous experiments) is the proper speed so that 3 propellers will reduce altitude
Microcontrollers :: 09-29-2015 18:29 :: BradtheRad :: Replies: 5 :: Views: 617
I have initialize clock, GPIO, DMA and SPI setting according to STM32CubeMx setting...
But don't show how.
I'm not working specifically with STM32 DMA, in so far can't help in this regard. I would expect you have already done some things:
- checked SPI operation with non-DMA HAL functions. Seeing it working would reduce the prob
Microcontrollers :: 09-28-2015 05:57 :: FvM :: Replies: 2 :: Views: 2327
gauravkothari23, I just want to back up what Audioguru is saying.
I have used a lot of Li-ion cells, often without protection circuits, and they stll make me nervous after years of using them.
Mis-charging a NiCd or NiMH, or even a lead-acid, is not very hazardous. Most likely you will just reduce the cell's life. Mis-charging, over-charging
Elementary Electronic Questions :: 09-27-2015 18:37 :: FoxyRick :: Replies: 5 :: Views: 700
use eg axial diode and coat it to reduce surface leakage...the internal leakage in the rev biased semiconductor is always more than any surface leakage, and dwarfs it into significance, as you know.
Power Electronics :: 09-26-2015 10:34 :: treez :: Replies: 2 :: Views: 538
Are you sure the value you placed physically is correct ? I couldn't see why this could happen, anyway you could reduce the value a few, to something close to 15pF for instance.
Microcontrollers :: 09-25-2015 12:49 :: andre_teprom :: Replies: 13 :: Views: 895
Peak current is 12V/Rs , Rs=2.4Ohm , Ipk= 5A
Consider low cost PC PSU or use IDE Molex plug from PC and add Ferrite CM choke to reduce EMI to power cable twisted pair with Cap at load to avoid EMI effects on analog and logic cables above for different
Analog Circuit Design :: 09-17-2015 14:06 :: SunnySkyguy :: Replies: 11 :: Views: 722
RF Common mode chokes will be necessary to balance the impedance (BALUN) and prevent AM detection of RF into audio noise.
interleaved grounds in layout is useful to reduce crosstalk in high impedance lines.
use quality caps for low level signals to avoid microphonics (ceramic piezo) and high
Elementary Electronic Questions :: 09-12-2015 08:28 :: SunnySkyguy :: Replies: 27 :: Views: 3393
There is a basic rule for a microstrip to reduce radiation: do not insert any inhomogeneity to it like bends and components.
Otherwise it must radiate. You can add a metal screen above the line or make a symmetrical microstrip.
PCB Routing Schematic Layout software and Simulation :: 09-07-2015 12:43 :: jiripolivka :: Replies: 6 :: Views: 678
reduce your parasitics
Analog Circuit Design :: 09-07-2015 03:11 :: SunnySkyguy :: Replies: 5 :: Views: 549
I have default clearance set as 10, min is 10, I want to setup a new clearance of 7. But it does not let me define the clearance for nets, only the trace width. I cannot change the min also, it is readonly.
What is the procedure to reduce the clearance for some nets? The CES tool is really confusing.
PCB Routing Schematic Layout software and Simulation :: 09-04-2015 15:40 :: ahgu :: Replies: 1 :: Views: 567
The audio draws power from the DC source.
The DC source is not a true voltage source and has ESR or effective series reistance.
Thus injected audio can reduce supply voltage when current increases.
We call this % load regulation, the ratio of change in source DC voltage with full load signal.
Analog Circuit Design :: 09-03-2015 03:26 :: SunnySkyguy :: Replies: 15 :: Views: 1102
You should take an IP3 measurement at ~10dB backed off from the PA's / RF Chains P1dB point. Thus reduce the I/P pwr till the O/P pwr is ~ 10dB lower than the P1dB point.
You need to be in the Amp's linear region. If you put too much power you will be compressing Amplifiers, and the IP3 will get worse.
RF, Microwave, Antennas and Optics :: 09-01-2015 22:29 :: Element_115 :: Replies: 1 :: Views: 626
Vacuum dust yet?
Reset BIOS yet? reduce FSB?
Try MEMTEST86+ on a burned CD to boot from or any live Linux yet?
Perhaps aging latent fault, means end of the road.
Service Manuals, Requests, Repair Tips :: 08-30-2015 19:58 :: SunnySkyguy :: Replies: 7 :: Views: 777
You need to compare IR LED's to ensure they are same .e.g. rated for 1A max impulse and 100mA continuous and also narrow angle for gain. (<10 deg)
You also need to ensure if you are sending > 100mA pulses that the pulse width is differentiated to reduce the avearge power inthe LED but maintain high peak power.
So compare LED currents in both usi
Elementary Electronic Questions :: 08-30-2015 17:16 :: SunnySkyguy :: Replies: 6 :: Views: 837
i would like see the transient response of dc motor.
if i apply 24v to circuit, than take 2 wire from motor pins,
what should i do with this pins ?
1) i want ta connect them to the analog input of microcontroler and it can only measure 0-5 V..
2) the things that i will do to measurement wires shouldn't effect the motor circuit of course
Elementary Electronic Questions :: 08-23-2015 09:37 :: yemi11 :: Replies: 4 :: Views: 582
I have achieved FAN Dimming using Phase chopping method, here I get smooth dimming on Incandescent Bulbs and I am also able to dim FAN using the same. But during FAN dimming it makes a lot of humming noise due to added harmonics. Can anyone explain this humming in detail and tell how to reduce this noise
Microcontrollers :: 08-20-2015 13:18 :: ajit5wadekar :: Replies: 0 :: Views: 411
A full wave rectified bridge delivers 1.4 x the average voltage to the caps when there is no load.
When you have some current limiting series resistors and a 10% preload the unregulated voltage variation can reduce 10 to 20% from 40%
or X% where the X% ripple voltage equals the X% drop in average voltage , so it never reaches the root(2) peak vo
Analog Circuit Design :: 08-19-2015 23:03 :: SunnySkyguy :: Replies: 1 :: Views: 474
I designed one portable device and battery is used to power the portable device. I choose one transistor, NSS20500UW3 which is from On Semi, to cut off the power supply from the battery when the portable device is in off work state.
The schematic is shown in the following picture. X3101 is a switch. When the portable devic
Power Electronics :: 08-17-2015 02:23 :: joshuacp :: Replies: 4 :: Views: 837
THe current for Fans starts at a fairly constant current and then rises slowly to perhaps double the current from 12 to 24V as more work is done pushing air. Typical 4" muffin fans take about 5W and you would get perhaps 20% of the RPM at 12V.
Adding resistors would only reduce the fan speed and dissipate more power in the series R's and be ineff
Elementary Electronic Questions :: 08-08-2015 00:32 :: SunnySkyguy :: Replies: 6 :: Views: 778
You need to determine characteristics of the noise in the frequency domain. The process of digital filtering consists to reduce components of the signal lying within a specific bandwidth.
Microcontrollers :: 08-05-2015 16:05 :: andre_teprom :: Replies: 18 :: Views: 1069
You can further reduce the bounding box size by setting a fixed value for your box. This will of course affect your resolution by reducing it from the default lambda/4. In the open boundaries setting, instead of using "fraction of a wavelength" (default 4), use a fixed value.
Hope that helps!
Electromagnetic Design and Simulation :: 07-31-2015 04:52 :: gyz182 :: Replies: 1 :: Views: 5693
A CPLD chip can do all of this with a bi-directional bus to reduce pin count. A good design starts with a State Diagram.
ASIC Design Methodologies and Tools (Digital) :: 07-30-2015 21:55 :: SunnySkyguy :: Replies: 4 :: Views: 652
Some cars have a whip antenna with a spiral of wire attached to the stalk of the antenna, as per the attached picture.
I have read (on various groups) that the spiral is there to reduce wind resistance and noise, alternatively that it covers AM reception as opposed to the content of the stalk covering FM reception.
Does anyone have a good re
RF, Microwave, Antennas and Optics :: 07-30-2015 14:02 :: bobilgner :: Replies: 2 :: Views: 488
The time to failure depends on the degree of mismatch among all the cells for specific gravity and ESR.
Eventually one cell gets weak and destroys the battery. In practise it is better to put batteries in series to reduce the the probability for peak currents which can cause accelerated aging or shorted plates. As well it makes it easier to
Power Electronics :: 07-29-2015 01:03 :: SunnySkyguy :: Replies: 2 :: Views: 455
The question you did not answer was; Was the display backlight visibly fully on, when you measured the current?
If not, it's the problem Audioguru describe.
The current shunt in the meter has a voltage drop. Most backlights I've seen has a Vf between 4 and 5V, normally around 4V5. If you reduce the voltage below this, the LEDs will not go on
Elementary Electronic Questions :: 07-28-2015 21:01 :: Gorgon :: Replies: 6 :: Views: 591
Yes, if you use higher clock frequency it will decrease the overall phase noise.
The phase noise of a 38 MHz crystal oscillator is slightly higher than the phase noise of a 32 kHz crystal oscillator, but the overall phase noise of the crystal oscillator is reduced by the number (N) of the PLL reference dividers on a rate of 20*LOG(N).
RF, Microwave, Antennas and Optics :: 07-26-2015 10:23 :: vfone :: Replies: 3 :: Views: 556
You reduce the ability of the transformer to deliver as much current as the current flowing through the secondary is DC. If it was a centre tapped transformer the currents in both halves of the secondary have their DC component opposed so the core does not saturate.
RF, Microwave, Antennas and Optics :: 07-26-2015 11:35 :: chuckey :: Replies: 2 :: Views: 634
Right now Density of board will be reduce once SOC come to the PCB Right ??
Wild guesses, but completely unlikely.
We have experienced more complex chips and often reduction of system package count in many applications, e.g. computer boards or electronic home appliances. Did you ever see a reduction of board density? Instead the
PCB Routing Schematic Layout software and Simulation :: 07-22-2015 16:27 :: FvM :: Replies: 6 :: Views: 693
Suppose there is a long interconnect and we want to reduce the delay by adding buffers. Where should the buffers be added, at the mid point or towards the driver side or the destination side? Why?
If there is a long interconnect than chances of antenna violations are more so try to pl
ASIC Design Methodologies and Tools (Digital) :: 07-22-2015 06:05 :: Anand Cool B :: Replies: 1 :: Views: 486
reduce winding doesn't work, you need to increase the secondary number of turns by 50 %.
Power Electronics :: 07-20-2015 13:24 :: FvM :: Replies: 3 :: Views: 584
Your supply seems unregulated type, which requires a preload of 5~10% to reduce the Vpk towards Vavg.
You can also reduce coil current if necessary.
Show schematic and ratings.
Analog Circuit Design :: 07-19-2015 18:41 :: SunnySkyguy :: Replies: 6 :: Views: 838
Insert a buffer in the clock path of the capture flop. A better approach is to reduce the delay in the data path of the capture flop.
ASIC Design Methodologies and Tools (Digital) :: 07-18-2015 07:50 :: sharath666 :: Replies: 7 :: Views: 1157
The zener clips the + base drive pulse to bypass the base current and drain the 0.004 cap to reduce the output voltage. Raising the Zener voltage increases the duration of pulse and saturate the core more.
Analog Circuit Design :: 07-17-2015 19:10 :: SunnySkyguy :: Replies: 1 :: Views: 485
For lower noise select smallest L and gretaer C to reduce the tank circuit's losses.
But there is an optimum point while losses are decreasing and simultaneosly oscillator conditions are met.
Analog Circuit Design :: 07-15-2015 23:03 :: BigBoss :: Replies: 20 :: Views: 2191
I have this small problem. I am using a 20kV transformer and not sure why this seems to require a start-up it might be to energize the coil.
The total time it takes is about 5ms. Which is too long for my application. Is there a way to reduce this start-sup time or at best remove it.
Attached is the scope image.
Power Electronics :: 07-14-2015 10:17 :: samuelr :: Replies: 4 :: Views: 478
If chokes are selected to reduce pulsed %THD and ripple then you must use pulse mode to test equivalent value at rated current to see if it meets design requirements.
If you want to verify part value against Mfg specs, then it must be tested in same method using same; f, current source, DC bias.
Correlation between the two methods depends on
Analog Circuit Design :: 07-09-2015 16:41 :: SunnySkyguy :: Replies: 7 :: Views: 737
Diode in reverse only works when diode is across motor to supply , V+ for both low side switches. otherwise diode across motor to gnd. for high side switch. Then driver is protected for Vmax and diode current rating must match driver for continuous current.
Small cap across motor may reduce EMI.
Current will be limited by RdsOn or Vce(sat) +
Elementary Electronic Questions :: 07-08-2015 17:04 :: SunnySkyguy :: Replies: 6 :: Views: 647
The main problem is with the electrode where the oxygen is given off.This would cause any metal to oxidise, in the case of aluminium, would cause an insulator to form on the surface of the electrode ans reduce the current flow.
Elementary Electronic Questions :: 07-07-2015 05:23 :: chuckey :: Replies: 2 :: Views: 504
If you dont know or say part number of LEDs, do we guess?
From datasheet are important design parameters for better heatsink pads and Vf vs I, but looking at your board, I suggest heatsink resistance is too high.
LM350 is not suitable here for more than 9V out and needs large heatsink with fan for >6W loss.3V*2A. DO NOT USE
I know these are 8m
Power Electronics :: 07-05-2015 18:33 :: SunnySkyguy :: Replies: 20 :: Views: 1804
I am doing some test experiment using high gain amplifier as I have very low input.
but on general pcb or on bread board I am getting unwanted signal may be due to coupling. when I am applying 3 V AC from my signal generator I am getting 200 mv at oscilloscope when generator and oscilloscope probe are 2 or 3 mm apart in a
Analog Circuit Design :: 06-27-2015 13:46 :: jiripolivka :: Replies: 6 :: Views: 533
I also agree with Klaus suggestion to keep close contact with manufacturer.
If you are planing to optimize the size of the PCB in order to reduce the waste of material ( consequently increasing the amount of boards per die - reducing the unit cost ) they could inform the copper sheet and the margin required between boards in photolithography.
PCB Routing Schematic Layout software and Simulation :: 06-27-2015 02:12 :: andre_teprom :: Replies: 6 :: Views: 964
I am using ORIGINPRO7 for drawing my research graphs. I have drawn two columns and single row using ORIGINPRO7. I want to reduce the height of VERTICAL lines of two columns using ORIGINPRO7 and retaining same horizontal length. What option I have to use for reducing the height of the VERTICAL line. Can you advice me. I have shown below screen sh
Elementary Electronic Questions :: 06-24-2015 12:50 :: raju_kambar :: Replies: 0 :: Views: 334
This RF oscillator for dielectric high frequency heating machine , operating at 27MHz but
i ve check with spectrum analyzer that it produces much 2nd harmonic around 54MHz.
The oscillator is Tuned grid tuned plate (I think) triode used is toshiba 8t25ra rating 25KW
I draw a circuit diagram attached and a picture , anyone help ad
RF, Microwave, Antennas and Optics :: 06-22-2015 06:38 :: Krit Lajaroj :: Replies: 5 :: Views: 763
I would like to join the analog and digital grounds at only one place in the PCB using a 0E resistor in order to reduce the noise level in the design.
But i stuck up with the SMPS Negative connection with the circuit. I don't know whether i need to connect the SMPS(0V) with analog section or digital section.
I give the layout here..
Analog Circuit Design :: 06-18-2015 07:57 :: Murugesh_89 :: Replies: 2 :: Views: 498
I have cheap XD-RF-5V module.
It is possible to reduce output noise when is present in missing active signal ?
RF, Microwave, Antennas and Optics :: 06-17-2015 10:06 :: colvstef :: Replies: 2 :: Views: 1166
Scan re-ordering. During (after) placement, the tool reorder flops in scan chain. Just connect the closest flops togeteher - to reduce scan chain wire length.
ASIC Design Methodologies and Tools (Digital) :: 06-13-2015 10:02 :: oratie :: Replies: 3 :: Views: 766