260 Threads found on edaboard.com: Divider Layout
Thank you activewei
My actual problem is VCO phase noise is very badly affected when PA is ON.
Note that we are generating VCO frequency which is twice the required.
there is a divider in modulator. I have applied sufficient isolation even then it did not improve much. The consequence of this problem is that ACP requirements are difficult to me
RF, Microwave, Antennas and Optics :: 02.03.2004 06:58 :: egemini :: Replies: 38 :: Views: 4971
Hi there anybody who knows about vlsi design layout? I m currently on a project tittled " vlsi layout design of a dynamic clock divider".. and i m just a begineer in this field..can anybody tell me how to get started ? i mean which part should i focus more on?
Analog IC Design and Layout :: 21.06.2005 19:23 :: Deric :: Replies: 91 :: Views: 22735
input voltage:1.2V, do not use some big resistor divider,
how to generate a 0.82v,0.75v output?
Analog IC Design and Layout :: 11.11.2004 21:24 :: leonken :: Replies: 13 :: Views: 2028
Don'y forget symetry, floorplan is (as usual) 70% of the job, interaction between TX PLL RX, connection to the pad... . Keep all the RF path as straight as possible in top metal. 45 degree. electromigration for inductor, especially in the PA or Driver.
Let me know if you want more information on a specific part: mixer, lna, divider,upcv ..
RF, Microwave, Antennas and Optics :: 17.07.2005 14:33 :: franck :: Replies: 4 :: Views: 1574
1.. When drawing the layout of a MOS, is it a good idea to put M1-M2 (matel1-metal2) and M2-M3.. contacts directly on the drain/source area of the transistor, just beside the gate? Or is it better to extend the M1 outside of the MOS and put all the contacts on the extension?
Depends on the application.If ur design demands the low resistance
Analog IC Design and Layout :: 11.01.2006 13:10 :: mahendra :: Replies: 5 :: Views: 962
I agree with biff44. For a lossless model the results are fair enough.
Try introducing dielectric and conduction losses to your model, and then see what happens.
%10 precent losses sounds a little bit high for a "small size" divider, but it depends on the specific design. for example, a low power application can suffer losses wit
RF, Microwave, Antennas and Optics :: 09.01.2006 07:04 :: Pushhead :: Replies: 6 :: Views: 1262
I want to design an equal split wilkinson power divider at a frequency of 960 MHz using ADS.I am a bit confused about the number of sections used and matching of the transmission lines.Can you please help me a bit
Look at the attachment file. May be it'll helpful to you.
RF, Microwave, Antennas and Optics :: 14.11.2006 11:11 :: borich_03 :: Replies: 18 :: Views: 8461
Cadsoft Eagle and Eagleware Genesys (now Agilent) are different programs.
2 way power divider (Wilkinson type):
Wilkinson power splitters- Microwave Encyclopedia -
RF, Microwave, Antennas and Optics :: 02.02.2012 14:29 :: volker_muehlhaus :: Replies: 13 :: Views: 2031
oh,thanks for your suggestion
but what you mean the isolation resister?
you mean adding a coxial line between the two port which is 100ohm or other?
Rolaki talk of Wilkinson-divider, not at powersplitter as yanghui3j example.
yanghui3j:s power splitter is impossible to make isolation above 6 dB between ports.
RF, Microwave, Antennas and Optics :: 21.07.2006 13:39 :: xxargs :: Replies: 9 :: Views: 1759
i need a widespread microstrip power divider
RF, Microwave, Antennas and Optics :: 04.03.2009 04:44 :: akedar :: Replies: 6 :: Views: 1676
I use 0603 resistor for 10GHz power divider, the result seems ok(S32 -25db)
RF, Microwave, Antennas and Optics :: 28.11.2006 14:55 :: sugm :: Replies: 8 :: Views: 1511
I'm currently looking for a good Architecture for 8-bit divider (the divident is 16-bit and divisor is 8-bit, the quotient is supposed to be 8-bit). The one I previously used was some "restoring division algorithm" and 16 iterations of subtractions are needed to obtain an 8-bit quotient, so it was working really slowly.
ASIC Design Methodologies and Tools (Digital) :: 15.01.2007 20:11 :: jerryjog :: Replies: 4 :: Views: 1967
I've already finished designing a 2-way wilkinson power divider from 0.8 to 6.45GHz in microstripe technology. But I met problems when I am trying to cascade another two at each output ports with 50 ohms line to form a 4-way PD. The simulation results in Momentum and Microstripes are far from what I expected.
Could anybody share me s
RF, Microwave, Antennas and Optics :: 15.02.2007 09:58 :: alard :: Replies: 18 :: Views: 3083
Kindly find this layout guidelines you can take some of them according to your case
Matching the current mirrors
Common centroid layout for the Capacitors & resistors
Use Resistors Dummies
Keep it away from any nose source like dividers and clock trees
matching for the diff pair (if any) but not to use (...)
Analog IC Design and Layout :: 06.11.2007 12:38 :: rania_hassan :: Replies: 11 :: Views: 4521
CML is certainly not neccessary, reasonable (dividers can easily be built out of plain vanilla CMOS logic and standard master slave flops and work at 800MHz even in 0.18, not to mention 0.13.
CML might have advantages in the dividers if you are after extremely low jitter and your loop BW is is very low since
Analog IC Design and Layout :: 04.07.2007 02:52 :: eternal_nan :: Replies: 22 :: Views: 5116
I'd like to make a 1/4 devider ('osc'/40KHz---->'clk'/10KHz) by the code as follows:
always @(posedge osc)
if(devider>=2) begin clk<=~clk;devider<=1;end
the waveform of 'clk' jitters, sometimes the 'clk' raises or falls on a wrong edge of 'osc'.please refer to the pictu
PLD, SPLD, GAL, CPLD, FPGA Design :: 12.11.2007 15:04 :: jason_tian :: Replies: 10 :: Views: 682
at the moment we build a broadband power divider.
The wilkinson type needs a resistor say 100 ohms.
what kind of resistor is it?
Is it easy to get it, maybe as samples from vendors
thanks and regards
RF, Microwave, Antennas and Optics :: 06.12.2007 08:03 :: mudrik :: Replies: 15 :: Views: 2045
If you make a hybrid coupler or wilkinson power divider in ADS layout, is it possible to have this imported into Orcad.
Here I mean to have it as an component with ports so I can use it in Orcad Capture?
Hope this make sense.
Analog IC Design and Layout :: 12.12.2007 16:38 :: tyassin :: Replies: 4 :: Views: 1386
So I have gotten my Wilkinson power divider designed and simulated. Now I want to extract the circuit to an EM simulation using MWO EMSight. The problem is that MWO doesn't recognize my thin film resistor in the EM simulator. Is there a way to get MWO to see the thin film resistor. I don't want to use a different simulator like sonnet.
RF, Microwave, Antennas and Optics :: 01.02.2008 15:51 :: drewcam888 :: Replies: 2 :: Views: 1457
Professional-product implemented- design of a TPSC divider by 2 in 065CMOS have been developed with a max freq of 6.2GHz (Design of Experiment -DOE- Post layout simulation) and measurements are in accordance with simulation.
Take care: there could be a LARGE difference from schematic and layout simulations. layout is (...)
Analog IC Design and Layout :: 06.03.2008 05:51 :: Mazz :: Replies: 5 :: Views: 902
The resistive divider being used for generating a stable referance and hence being sheided from top using poly.
Analog IC Design and Layout :: 06.05.2008 10:28 :: supreet_95 :: Replies: 15 :: Views: 1149
I am modeling a 3dB wilkinson divider at 30 GHz. In ADS, the S parameters and performance is exactly what I would expect. I then export the layout in dxf and import it into HFSS. After adding all the geometries and ports to HFSS the model converges and solves. However, I have run into something that I can't explain. When I run the HFSS model w
Electromagnetic Design and Simulation :: 03.08.2008 01:42 :: jlovejoy :: Replies: 4 :: Views: 1973
I am going to make a PCB with a wikinson power divider, which includes a SMT 100 Ohm resistor. For the 0402 resistor, I got the dimension of it from the data sheet, for example 1mm length and 0.5mm width. But there is no recommends of the PCB pads.
My question is that what is the dimension of the pcb pads and spacing should I
RF, Microwave, Antennas and Optics :: 08.10.2008 23:03 :: antenna_abc :: Replies: 2 :: Views: 2620
I have to design coplanar power divider using ADS 2006. I have done it using schematic window but when I generate the layout using for momentum, I do not know how to set the properties for substrate....can somebody help me with that?
RF, Microwave, Antennas and Optics :: 13.02.2009 19:36 :: moazammaqsood :: Replies: 4 :: Views: 805
i have made schematic for power divider, it's working (response ) is the best.
when i generated layout, and executed the EM analysis, i noted that layout is ignoring the effect of all the shunt resistors used.
i want design on microstripline,
can any-body help me how to figure out this situation,
should i place (...)
RF, Microwave, Antennas and Optics :: 17.02.2009 10:08 :: accountme05 :: Replies: 2 :: Views: 507
I have constructed two designs of three way uneven Wilkinson power divider with division ratio of 1:2.5:2.5 in microstrip topology at center frequency of 2.14 GHz, these dividers are needed for designing Doherty amplifier::::I'm alwesy suffering from the shifting of center frequency during the simulating by momentum, e.g. shift to the h
RF, Microwave, Antennas and Optics :: 27.02.2009 18:34 :: raed_microwave :: Replies: 10 :: Views: 2648
You should work on microstrip sector power divider, its very easy to fabricate on microstrip lines with no lumped components used and power and phase levels can be adjusted at outputs. If you need to work on it tell me i can provide you with its papers.
RF, Microwave, Antennas and Optics :: 30.04.2009 12:49 :: usman_mahfooz :: Replies: 11 :: Views: 2074
I have abandoned my quest to build an energy meter completely from scratch since I've found out that you get such nice energy meter IC's such as the ADE7753.
I now want to interface with this device with a PIC18F452 (primarily because this is the model I have lying around). I have one question...for now:
I am going to read the curr
Microcontrollers :: 10.06.2009 08:50 :: Swys :: Replies: 7 :: Views: 4213
Now I am working on a frequency synthesizer, however, I am blocked by the prommable divider, namely, 15/16 prescaler, program counter and swallow counter.
May you show me some tutorials or files regarded to this topic? or tell me how can I get start. I am a fresh guy in this field.
Thank you in advance.
Analog IC Design and Layout :: 06.02.2010 14:55 :: wireless man :: Replies: 1 :: Views: 517
we need to design a T-junction power divider in ADS in layout window.But we dont know how to design it pls help us on how to design it!.
RF, Microwave, Antennas and Optics :: 31.03.2010 19:17 :: kandmurugan :: Replies: 5 :: Views: 1883
I have simulated a 2 section wilkinson power divider at 2-4 GHz using lumped resistors in schematic of AWR .Since layout is not reflecting that resistors ,I can't do EM simulation .Please suggest how do to this and to take care of the parasitic at higher frequencies
Electromagnetic Design and Simulation :: 29.05.2010 10:34 :: kumarkaushal :: Replies: 8 :: Views: 2058
plz Can somebody pleze help me with disgn an 25 GHz wilkinson power divider in ADS with layout.
This is my data for substrate:
Er=3.55, H=0.203, TanD=0.0027,
I need to design an layout, and it is in microstrip and the frequency is 25 GHZ.
RF, Microwave, Antennas and Optics :: 11.06.2010 19:10 :: Jassim76 :: Replies: 3 :: Views: 1060
Im trying to design wilkinson power divider in ansoft designer, range 5-15 Ghz, input, output return losses, and isolation equal -30 db. Now im wondering how may sections in the transofmer i need to have to meet -30 db input return loss in the frequency range 5-15 Ghz?
RF, Microwave, Antennas and Optics :: 21.07.2010 16:11 :: BiH :: Replies: 1 :: Views: 512
i have designed a wilkinson Power divider in ADS,
in the schemetic it is working best but when i generate layout,
i have no idea how to place shunt resistors(lumped element in case of schematic) between the microstrip lines. ..
when i calculate W and L for equalenct value for resistance, and place them between the m-lines,
RF, Microwave, Antennas and Optics :: 18.08.2010 07:25 :: accountme05 :: Replies: 1 :: Views: 523
Stripline impedance is a function of line width, separation, and dielectric constant of the separator.
Simon and Waddel are useful references and there are numerous applets on the the web to get you started. Polar Si9000 is also a good tool but there is a cost associated with using it.
You might also like
Electromagnetic Design and Simulation :: 28.09.2010 20:21 :: Azulykit :: Replies: 3 :: Views: 1116
i currently in progress of designing lossless power divider, T-junction
i use equal power divider (with input feed 50ohm), connected to QWT*, and to the output feed which will later combine to antenna.
the feed is connected to QWT and directly attach to 50 output feed iwhich is bent (+ mitter bent)
when simulating my results, i obtain S11
RF, Microwave, Antennas and Optics :: 09.10.2010 20:11 :: vioamethyst :: Replies: 9 :: Views: 679
There are some points missing in your calculation:
- The voltage gain would be reduced by the finite transistor transcondutance, you have to reduce Re to about 12 ohm to compensate for it.
- You can try to get an exact value for Vbe at the respective operation point from the transistor datasheet, but it's not much help, because the actual value
Electronic Elementary Questions :: 06.11.2010 17:59 :: FvM :: Replies: 3 :: Views: 1588
I found that ADF4106 evaluation board using three 18 ohm resistors as power divider in pll at 5.6GHz.
Now I want to design a 8GHz synthesizer,could this circuits be used at 8GHz? Or I have to use a microwave power divider in microstrip?
RF, Microwave, Antennas and Optics :: 19.12.2010 10:20 :: fenfei :: Replies: 6 :: Views: 708
i've designed some wilkinson power divider in microwave office and exported the layout to altium designer 2009
im going to manipulate the layout in altium designer to fit the layout for special PCB.ok?
so i'm going to convert the rectangular filled area to curved filled area.but as we khnow in wilkinson (...)
RF, Microwave, Antennas and Optics :: 21.03.2011 17:13 :: young.microwave.eng :: Replies: 3 :: Views: 579
Following the thread, I have done some advances. Now here is an odd problem I am facing with Cadence IC5141.
I have done a layout of the simple voltage divider circuit using the RNNPO_RF model file in UMC018 library.
Analog IC Design and Layout :: 21.04.2011 09:22 :: Deepon :: Replies: 1 :: Views: 367
Do you really mean you are transmitting it SSB? SSB means you are stripping off the carrier, and the phase/frequency information of the wireless signal no longer is fixed. It works fine for audio where you can stand big amounts of distortion and still understand the spoken words, but may be useless in other applications.
Are you sending the re
RF, Microwave, Antennas and Optics :: 12.07.2011 18:36 :: biff44 :: Replies: 29 :: Views: 1124
I have been working on a Wilkinson equal power divider. Most of the S matrix looks fine but the two output match is very poor, only -12dB or so. I have defined a RLC lump boundary for the 100 ohms resistor. The layout of my Wilkinson is attached. Please take a look and comment on why the output match is so bad.
Electromagnetic Design and Simulation :: 26.10.2011 02:58 :: Microwave123 :: Replies: 2 :: Views: 1153
I have a voltage to current converter with a slope of 1.2195mA/V (so 0.82V will generate 1mA and 0.082V will generate 100uA).
I have created a circuit with which I can select between these 2 currents with a microcontroller.
For this I am using P-channel JFET because of its very low Id-leakage current when set to the "off"-state.
Analog Circuit Design :: 09.12.2011 13:41 :: Wamor :: Replies: 6 :: Views: 250
Hello sir ,
For 4 way Wilkinson power divider , I used the TFR as isolation resistor, I don't know ,how to find the thickness and width of TFR. I am getting the wrong values for both circuit and EM simulation for S- parameters for S(3,2) and S(1,1).I expect the reults as follows for both circuit and EM simulations.
For circuit s
RF, Microwave, Antennas and Optics :: 10.12.2011 18:14 :: btv_murthy :: Replies: 9 :: Views: 458
In your initial post, the role of R3 and R4 is completely unclear.
I also don't see which particular circuit detail in AN-30 you're referring to. Why is it so difficult to post a clear question?
P.S.: There we go!
R1/R2 is basically a voltage divider. It's output impedance should be sufficient low that you can ignore the "Iout" respectivel
Electronic Elementary Questions :: 31.12.2011 11:12 :: FvM :: Replies: 11 :: Views: 408
While designing a circuit a 20Ghz you have to take alot of measure because of coupling between the microstrip. It wont be an easy design as you have to add extra lambda/2 length in the ring of Wilkinson divider to avoid the inter-coupling. And while simulating it properly select ARC Resolution otherwise your result will not be correct.
Electronic Elementary Questions :: 26.03.2012 15:12 :: capcas :: Replies: 23 :: Views: 991
is there any advantage in designing power dividers at 1GHz
No. This frequency is not of special importance. But if you understand the design method for 1GHz, you can design the divider for other useful frequencies.
RF, Microwave, Antennas and Optics :: 29.04.2012 19:16 :: volker_muehlhaus :: Replies: 14 :: Views: 606
I designed a 50 ohm 1-2 wilkinson power divider for for 2.4 GHz. I don't know why but my S11 is not correct. It is -40db at 2.8 GHz instead of 2.4 GHz. My S22, S33 and S23 are also not correct please help me. This is my HFSS design. I used Appcad for initial line width measurement and then used HFSS seperately for tuning the lines to requirement. P
RF, Microwave, Antennas and Optics :: 17.05.2012 15:07 :: sarslanali :: Replies: 5 :: Views: 367
i want to design an equal 4-way power divider without resistor that can handle high power up to 40w and small size for an amplifier.
i find some papers,but i want to all output ports be equal.
do you suggest anything that can satisfy my conditions?:grin:
please help me with details for simulation and drawing.:?::?::?:
RF, Microwave, Antennas and Optics :: 07.08.2012 00:47 :: reza064 :: Replies: 14 :: Views: 494
In his circuit he uses a current transformer on the primary side of the switching transformer to regulate the output current. The way it is set up his controller runs the minimum duty-cycle that it takes to make the amount of amperage set by the current transformer's adjustment POT. Regulating the primary side current loosely regulates the output c
Power Electronics :: 16.03.2013 18:44 :: GeorgesWelding :: Replies: 22 :: Views: 588