1000 Threads found on edaboard.com: Matching Source And Load
With the case of a transmission line between a source and a load there always are the following important points:
1. matching the load to the line,
2. line loss as a function of its length
3. matching the load to the line
4. homogeneity of the line
In general, even with a (...)
RF, Microwave, Antennas and Optics :: 07-24-2012 05:43 :: jiripolivka :: Replies: 4 :: Views: 349
In the datasheet of a component, for example, a passive filter, it often plots the S21 over a frequency range under the test condition that source and load impedance are both 50 Ohm. I always wondered, how will the curve change when the source and load impedance doesn't equal to (...)
RF, Microwave, Antennas and Optics :: 03-10-2013 17:02 :: grit_fire :: Replies: 2 :: Views: 300
In RF engineering, impedance matching does not involve adding resistance to the source rather than transforming the existing source impedance by a lossless network.
Wideband or pulse systems may use lossy networks to achieve frequency independant impedance matching when maximum output power isn't the (...)
Electronic Elementary Questions :: 07-29-2009 17:58 :: FvM :: Replies: 4 :: Views: 2104
I have studied the termination techniques,and understood the reason for Series Termination(@source) and llel termination question is can i Terminate the trace at both ends to Match all impedances(source,Trace and load).
PCB Routing Schematic Layout software and Simulation :: 08-25-2009 05:23 :: dmd4raj :: Replies: 1 :: Views: 1147
For unshielded IO cable it is recommended to use low pass filter at the exit of cable. The configuration of the filter depends on the source and loading impedance. Different high and low combination of the impedance requires different filters. But what is the source and (...)
Electromagnetic Design and Simulation :: 05-15-2012 18:01 :: jiripolivka :: Replies: 1 :: Views: 359
It depends on amplifier...
If the amplifier is a high power amplifier at RF frequencies, "optimum load impedance" should be found and matching is done with this impedance.
Or if the amplifier is low power or small signal amlifier, matching should be done with "conjugate matching technique" to obtain (...)
RF, Microwave, Antennas and Optics :: 06-18-2006 18:41 :: BigBoss :: Replies: 8 :: Views: 856
hi after i design lna and calculate gamma load,at certian power gain and noise figure can i easy ploting gamma source by change gamma load grafically
i use ADS2003
RF, Microwave, Antennas and Optics :: 05-08-2004 22:30 :: abdoeng :: Replies: 3 :: Views: 1487
Hi everyone, here is my problem!
I have the ADS model of a transistor. In the datasheet of this transistor, the Zs and Zl for five different frequencies are given and stated that these values are optimized for power, gain, PAE and Psat. So I have been trying to find these exact values of source impedances (...)
RF, Microwave, Antennas and Optics :: 09-04-2012 13:19 :: rashed1880 :: Replies: 2 :: Views: 1036
An impedance matching calculator. You specify the real and imaginary values for the source and load, specify the frequency of interest, and LCMatch calculates all possible two element matching networks, (LC, CL, CC, LL).
RF, Microwave, Antennas and Optics :: 09-17-2001 07:40 :: Robin Hood :: Replies: 0 :: Views: 3169
is a lumped element calculator with many topologies.
RF, Microwave, Antennas and Optics :: 06-16-2003 22:20 :: flatulent :: Replies: 1 :: Views: 1136
load pulling the input and the output in order to generate load circles on the Smith chart is the practical way to do this, either in the simulator or on the bench. Theoretical matching starts to depart from reality with Power amplifiers.
RF, Microwave, Antennas and Optics :: 07-25-2006 14:34 :: toonafishy :: Replies: 3 :: Views: 1049
How can we calculate transmission voltage if we know only load power and distance between load and souce? Help me please! thanks
Electronic Elementary Questions :: 02-12-2007 20:23 :: Yarafat :: Replies: 1 :: Views: 488
This depends by the matching topology.
In the L-networks the Q of the circuit is automatically defined when source and load impedances are set.
Pi or T networks allows to select a circuit Q independent of the source and load impedances as long as the Q chosen is larger (...)
RF, Microwave, Antennas and Optics :: 06-10-2007 06:45 :: vfone :: Replies: 7 :: Views: 1367
i need 24V,4amps dc source.can anybody help me
Analog Circuit Design :: 03-26-2008 04:57 :: vinothtnt :: Replies: 3 :: Views: 761
He is very ambiguous in what he is asking about in 2nd ed problem 3.1.
Any directions will be appreciated. I have read the chapter very properly and understand the L-match etc but cannot figure out what is he talking about.
It seems like some important point the seniors must know.
Consider two approaches to matching a purely resistive 7
Electronic Elementary Questions :: 06-10-2009 13:15 :: willdoit :: Replies: 4 :: Views: 1109
1, load 1A 30VDC
2, 25X 1.2V 10AH NiCD battery (UniCAD KLP10P)
3, Input 240 AC 50Hz
Purpose: Connected in parallel to both the rectifier and load for use as an
auxiliary power source. (As backup PS when AC is not available)
Any suggestion for the design?
Currently I looking for the compatible timer IC (...)
Electronic Elementary Questions :: 06-29-2009 07:10 :: ZenXtr :: Replies: 7 :: Views: 1259
If there is ideal voltage source and load is connected to it, being the ideal voltage source it can source upto infinite current to the load and the voltage level will not drop.
Now coming to non-ideal voltage source or Voltage regulator; if the regulator (...)
Analog Circuit Design :: 07-31-2009 13:06 :: freescale_bharat :: Replies: 1 :: Views: 2077
Vfone is correct, google Conjugate matching.
Also, you will see that a match for optimal Gain will not be the best match
for Max Pout in general.
RF, Microwave, Antennas and Optics :: 01-12-2010 16:27 :: Element_115 :: Replies: 4 :: Views: 861
Read the impedance matching chapter from Bowick book.
RF, Microwave, Antennas and Optics :: 03-07-2010 13:30 :: vfone :: Replies: 3 :: Views: 1057
i want to match Z-source and Z-load impedance at 2GHz which are present in the attached file, using ADS Smith chart utility. I am confused about the behavior of this utility.
At 2 GHZ Z_load is 19.4+j*39.9 ohm. It is provided in the source and load termination (...)
RF, Microwave, Antennas and Optics :: 01-06-2012 01:56 :: adnan012 :: Replies: 0 :: Views: 1123
I have input signal where capacitive part is dominated.
Do you mean a mostly capacitive source impedance?
I have input signal where capacitive part is dominated.
What demands compensation? Are you required to achieve impedance matching?
However I am getting too narrow characteristic. As result it very se
Electronic Elementary Questions :: 09-09-2012 16:40 :: FvM :: Replies: 5 :: Views: 353
You can use a directional coupler, it measures forward and reflected wave. By nature, it has a finite transmission line length and a characteristic impedance. But if it's short related to wavelength, it won't cause large changes to the impedance matching, presumed the characteristic impedance is roughly in the same range as the (...)
RF, Microwave, Antennas and Optics :: 07-07-2013 11:07 :: FvM :: Replies: 4 :: Views: 337
Why matching is needed in analog layout?
Analog IC Design and Layout :: 08-04-2013 01:17 :: VLSI_Learner :: Replies: 5 :: Views: 440
I am design a Capless LDO.
When I check the load regulator of the LDO,
the simulation result is strange:
the output voltage is negative value
when the load from light load to heavy load.
Please reference the attached file.
After check the current of the Power MOS (MP) during light load (...)
Analog IC Design and Layout :: 06-22-2014 22:09 :: mpig09 :: Replies: 16 :: Views: 707
Is there anybody who has great exprience about load pull technique of the amplifiers in the area of either simulation or measurements..
I'm curious about the accuracy of the simulation engines such as ADS ,Ansoft or MW Office etc. Which one is better ? or this depends on some special conditions ( I mean under some special operating classe
RF, Microwave, Antennas and Optics :: 05-23-2003 17:53 :: BigBoss :: Replies: 7 :: Views: 3090
Hello to everyone
I am looking for three books of the Prof. W.K. Chen.
The titles are:
" Broadband matching:theory and implementation";
"Broadband matching theory and implementation: problems and solutions"
"Theory and Design of (...)
RF, Microwave, Antennas and Optics :: 06-03-2003 10:07 :: pll :: Replies: 2 :: Views: 1461
MICROWAVE FILTERS,IMPEDANCE-matching NETWORKS,and COUPLING STRUCTURES
GEORGE L. MATTHAEI
Department of Electrical
& Computer Engineering
University of California
Santa Barbara, CA
Naval Research Laboratory
E. M. T. JONES
Technology for Communications
Mountain View, CA
this book is
RF, Microwave, Antennas and Optics :: 04-12-2004 09:29 :: IICCEE :: Replies: 22 :: Views: 10256
As you said, sometimes it is intentional to merge bias/match network and this is obvious.
The bias network, if not well designd can impact on signal, so on s parameter of the LNA.
Also the layout is fundamental, of course.
But I do not really understand your problem: could you be more detailed?
Furthermore, do not expect perfect matching (...)
RF, Microwave, Antennas and Optics :: 06-07-2004 11:45 :: Mazz :: Replies: 11 :: Views: 1550
Though i have pursued my circuit analysis course long back, i am not yet convinced with the knowledge i have gained. I have a very basic thing to ask, as written in the topic, the difference between Voltage source and Current source. Also, the differences between voltage and current if that is necessary... also... (...)
Electronic Elementary Questions :: 07-03-2004 13:10 :: cedance :: Replies: 15 :: Views: 2759
I'm kinda new to FDTD, I would like to know about the differences between Hard source and Soft source in FDTD. The book by Dennis Sullivan explained but in a rather confusing approach.
Electromagnetic Design and Simulation :: 01-13-2005 22:09 :: contagiouseddie :: Replies: 3 :: Views: 6840
I have my own usb circuit includes 89s52 and pdiusbd12 from phillips. Now I want know how I can work with my ciruit and how I can write a firmware and load it from PC or 89s52 to usb controller. My circuit is similar to pdiusbd12 evaluation board from phillips.
Microcontrollers :: 08-26-2005 15:03 :: agha :: Replies: 0 :: Views: 559
Hi. Does anyone have some example simulations in M/W/O, ADS or materials, of wideband amplifiers for frequency around 200-400 MHz ? Maybe someone has got some experience in design of such amplifiers?
I want to design such amplifier.
It has to fulfil following requirements:
small signal gain: 40dB
RF, Microwave, Antennas and Optics :: 10-15-2005 17:38 :: jarys :: Replies: 4 :: Views: 893
I WAN TO understand the difference and purpose of source and channel coding
Digital communication :: 03-21-2006 07:16 :: electronics_kumar :: Replies: 8 :: Views: 1466
what is the main differnce between switching regulator and linear regulator? for DC-DC convertor which regulator is used?send if any supporting doc present
Electronic Elementary Questions :: 05-30-2006 05:33 :: poovannan :: Replies: 9 :: Views: 14585
due to high gain and reverse gain S12 of the transistor , at low frequencies the transistor become unstable this make the AMP OSCILLATE for some load and source terminattion
if the amp is unstable some times the input impednace become negative , and S11 become larger than one
check gonzalez book or (...)
RF, Microwave, Antennas and Optics :: 07-09-2006 09:37 :: khouly :: Replies: 7 :: Views: 1144
In MOS , there are two pn junctions formed
1) Between n+ source and PSubstrate
2)Between n+ Drain and PSubstrate
In Kang,I read that these junctions are always reverse biased ...
How does this happen ??
If the junction 1 is to be reverse biased , then source has to be at a higher potential than the Psubstrate
Analog Circuit Design :: 10-10-2006 10:41 :: its_thepip :: Replies: 3 :: Views: 2313
In one model ,i set a lumped port on one side of a microstrip line which was connected to a monopole as a feed line.I set the resistence of the lumped port to be 50ohms and the reactance 0 ohms, after simulation i chected the matrix dada in solution data of "HFSS" option,i chose the Z parameters and i found the Z:lumpport1 value at 8.25GHz is 32.
Electromagnetic Design and Simulation :: 11-22-2006 20:00 :: sanders :: Replies: 4 :: Views: 1558
It is called impedance matching transformer or sound output transformer... match the transformer output impedance to the impedance of speaker..
Analog Circuit Design :: 03-01-2007 19:28 :: wisepie :: Replies: 3 :: Views: 952
in the LNA , all u want is a very low noise performance , and this hold that u must match the input from minimum noise which is not the matching for bet S11 , S11 will be -20 or -15 if ur matching for max gain
i think it is normal , check ur gain , and noise figure
RF, Microwave, Antennas and Optics :: 03-04-2007 01:59 :: khouly :: Replies: 12 :: Views: 1094
What is Line and load regulation ? why do we need to take care on it on circuit design ?
For LDO design, How do we measure them ?
I have read a paper on LDO design such that it is "stable on any Cap. value". is it possible to do so ?
Analog IC Design and Layout :: 04-07-2007 10:30 :: ee_cchac :: Replies: 5 :: Views: 1512
Hello all, I am now designing a differential resistor ladder that has a top current source and a bottom current source. The current that flows through the resistor ladder is 15mA. I know that for the bottom current source, I can use NPN BJT to generate the current. I also know that I could have used PNP BJT to generate the (...)
Analog IC Design and Layout :: 06-26-2007 18:55 :: chemaphy :: Replies: 3 :: Views: 1365
Before I simulation differential LNA , I need to setup my
simulation environment. So I draw a circuit as attach file .
The question is how should I set balun turn N1:N2 ratio and load R ?
Analog Circuit Design :: 06-27-2007 04:31 :: super :: Replies: 0 :: Views: 591
How do I modulate data signals on a 12V power source? What i'm trying to do is send data to a device with just 2 wire; gnd and vcc. The vcc line will power the device after filtering but it also will function as a data line.
Hobby Circuits and Small Projects Problems :: 08-05-2007 17:12 :: david90 :: Replies: 3 :: Views: 1090
I just found that the gain of Common-source and common-gate structure is almost equal to each other, it's about gm*RL, regardless of the sign of the gain.
and because of the body effect, the gain of the CG structure is a little larger than the CS one, Even the bandwidth of CG is always larger than the later, (...)
Analog IC Design and Layout :: 10-18-2007 22:35 :: abcyin :: Replies: 3 :: Views: 1213
what is the difference between the gain voltage and the S21 parameter?
NB: I find always a diffrent value of gain when I tried the S_param simulation and the AC simulation.
Analog IC Design and Layout :: 11-26-2007 11:53 :: HAJER LAHIANI :: Replies: 3 :: Views: 4417
when we have an external clock source and an PLL inside a chip level design from which point to which point will source latency be considered. As it is a chip level design consider the clock pad in between the external clock source and PLL.
ASIC Design Methodologies and Tools (Digital) :: 12-10-2007 03:03 :: praneshcn :: Replies: 3 :: Views: 1141
Can anyone tell me what is load regulation and line regulation in buck regulator? Also how to calculate it? we say 0.1% /A? So what actually it means?
Analog Circuit Design :: 01-23-2008 08:02 :: mvijay :: Replies: 5 :: Views: 3208
Anybody tell me that what are the reasons for getting slew violations and load violations in Physical Design (place and route).Pls let me know the different techniques to fix load violations and slew violations,let me know how to fix these violations in magma.
ASIC Design Methodologies and Tools (Digital) :: 03-01-2008 02:10 :: designer_ec :: Replies: 2 :: Views: 2656
Does anyone know the difference between the Edge source and the Edge signal source in ADS. When I tried to measure the EVM of the Edge signal source using the 1 pin EVM measurement block I got 1.294 (ratio). The EVM of the edge source was 1.9e-15 (ratio). The latter value is the correct one (~ 0).
Why am (...)
Software Problems, Hints and Reviews :: 04-07-2008 18:26 :: mbyoussef :: Replies: 0 :: Views: 455
Hi,why & How Fets conduct with voltage of either polarity applied to the source and drain?
Analog Circuit Design :: 04-16-2008 02:20 :: electronc_elementary :: Replies: 1 :: Views: 481