103 Threads found on edaboard.com: Type 2 Compensation
do you mean a 2-stage fully differential op-amp? what is your amplifier architecture? which type compensation?
Analog Circuit Design :: 24.02.2007 20:07 :: gingerjiang :: Replies: 3 :: Views: 758
I am a french student in trainning course in M.E.V company (Toulouse in France).
And I would like to condition a temperature sensor type PT1000.
I think about an FPAA solution.
I have 4 sensors.
A discret circuit already exist but it is very noise sensitive.
So it's the reason why i would like to integer this circuit in a chip.
If somebody ha
Analog Circuit Design :: 03.03.2004 06:01 :: Guillaume :: Replies: 2 :: Views: 3288
In what type of applications you use this law?
I have never heared for it.
Electronic Elementary Questions :: 19.07.2004 03:58 :: epp :: Replies: 4 :: Views: 1298
What is the compensation network used for ?
There are type I ,II and III, what's the difference ?
Analog Circuit Design :: 18.10.2004 03:59 :: chmr :: Replies: 10 :: Views: 3033
Measuring DC open loop gain usually use AC analysis, which cannot use in SC CMFB circuits since SC-CMFB has only the effect in transient events. For simulate the open loop gain, you can use some type of ideal common-mode feedback.
Analog Circuit Design :: 14.01.2005 14:58 :: terryssw :: Replies: 12 :: Views: 2513
slope comp is for current mode ic's only. better to start with voltage mode (simply comparing error voltage to a ramp) because it is more clear.
so there are a few kinds of compensation. if your output cap has a lot of ESR, you get a free low-frequency zero and can use type 2 compensation (1 pole, 1 zero). if you have a low-esr (...)
Analog IC Design and Layout :: 24.02.2005 20:08 :: electronrancher :: Replies: 9 :: Views: 1275
what 's buck converter do you work ?
Voltage mode and current mode is so different.
if you using voltage mode , you can use type ii and type III compensation .
but you using current mode , you just using R,C compensation in the Error amplifier out .
Analog IC Design and Layout :: 18.06.2005 00:10 :: mitgrace :: Replies: 3 :: Views: 1284
in the volatge mode dc/dc for buck . you need do compensation . becasue L.C is phase shift , you need to compensation to improve the total system phase margin . You can use type II or type III compesation method
Analog IC Design and Layout :: 18.06.2005 00:29 :: mitgrace :: Replies: 7 :: Views: 1154
this is a BJT type bandgap ckt,
u can check Fig4.4 in
and this book also discuss what u want to know in some chapters.
Analog Circuit Design :: 11.06.2005 01:02 :: Btrend :: Replies: 4 :: Views: 751
This type of error amplifier has never been my preference, even though some personalities advocate its use. I prefer the type 2 EA, that introduces a zero and helps boost the phase margin.
Anyway, to answer your question, look at the picture of the Bode plot and note that the resulting gain (in dB) is merely an addition of the top two. The gain
Analog Circuit Design :: 26.12.2005 15:11 :: VVV :: Replies: 6 :: Views: 985
Any comments (pros & cons) on using opamp and OTA(output Transconductance Amplifier) for compensation as type 1,2,3 for DC/DC converter (voltage mode control) ?
Analog Circuit Design :: 11.03.2006 19:27 :: hoonsk :: Replies: 0 :: Views: 761
i have a question, The dirver MOS of LDO is used. what different the MOS use N-type or P-type??? Using NMOS driver have some advantage???
use nmos has lower ouput impedance and no need external capacitor for
Analog Circuit Design :: 10.04.2006 04:19 :: surianova :: Replies: 9 :: Views: 1348
need help to design /analyse open / closed loop
of pwm boost type dc-dc convertor.
best if we can have BODE plot
to fix those inductor, capacitor,... values
thanks in advance.
Analog Circuit Design :: 30.04.2006 22:28 :: jcpu :: Replies: 4 :: Views: 989
I am designing a project. I use ADC for reading small voltage of thermocouples. My project need to used for multi-type of thermocouples. So I need to compensate cold-junction of the thermocouples but I don't know how to. Please advise me, if I use software compensator by using a thermistor at cold-junction.
Also I don't understand about isother
Robotics and Automatics Forum :: 07.06.2006 00:07 :: BabyTiger :: Replies: 6 :: Views: 2274
How do we analyse temperature compensation in op-amps using spice?
I am using spectre for the same. So how can this be done for a bandagap type of circuit?
Analog IC Design and Layout :: 24.09.2006 23:00 :: karma_yogi :: Replies: 1 :: Views: 1024
a more professional approach is to use sigma delta ADC(16bit or higher) and use a microcontroller to calibrate and linearize ADC output in digital domain.
Such these ADC are available from TI(BurrBrown,ADI,Linear,...),for example AD7715,AD7714,ADS1216,ADS1241.
All termocouple types with any temp range can be defined in firmware.
Professional Hardware and Electronics Design :: 04.01.2007 11:06 :: 7rots51 :: Replies: 6 :: Views: 3041
there is a lot of literature discuss about the buck , buck-boost topology of DC-DC converter pole and zero, why i can't find any derivation about boost type DC-DC converter ?
Analog Circuit Design :: 04.09.2007 06:36 :: pianomania :: Replies: 6 :: Views: 1339
I think ,if I type compensation the err amp is ota.
II or III type compensation both ota or op-amp is ok? is it correct?
Analog Circuit Design :: 11.11.2007 10:48 :: sunoftech :: Replies: 2 :: Views: 955
I am studying buck DC/DC now.
For voltage control pwm, some papers introduce the typeII and typeIII compensation. But when I study some datasheet like TI's TPS62300,TPS65023...
It looks there is no external compensation RC with voltage control mode.
Can anybody give me some idea on how to fulfill this (...)
Analog Circuit Design :: 28.11.2007 02:41 :: tonywai :: Replies: 11 :: Views: 1519
I am using ad595 for a project and a K type thermcouple.
My problem is that ice point compensation does not work properly.
when I disconnect the thermocouple from circuit, I short circuit the input
for this test, and I get around 60 mv in output of the ad595 that shows
around 6'C but the room temprature is around 25 'C. can anybo
Microcontrollers :: 14.12.2008 14:36 :: myid123456 :: Replies: 3 :: Views: 1561
It sounds like you are using the comparator in an "auto-zero" type configuration. That changes everything, since in the autozero phase, it is essentially an amplifier in unity gain feedback.
What I would suggest in order to maintain auto-zero capability is to consider auto-zeroing using the first stage in order to maintain stability. The first
Analog Circuit Design :: 29.12.2008 10:36 :: JPR :: Replies: 7 :: Views: 1710
does anybody know how i can model a 4N35 opto coupler for use in an offline SMPS feedback control circuit ?
it is a one transistor forward converter and i need to use type 3 compensation.
Page 2 (top) of this shows type 3 compensation
Professional Hardware and Electronics Design :: 09.01.2009 14:34 :: eem2am :: Replies: 3 :: Views: 3562
Need details or reference for type 3 compensation in UC3525 based dc dc converter. I need practical design steps that will be helpful in designing.\
Any member who have access for such design steps details or any software that help for such calculation?
Please give your comments/suggessions.
Power Electronics :: 23.06.2009 03:59 :: bdmehta :: Replies: 0 :: Views: 796
Dear friends ,
can some one share some details about type-3 compensation simulation for DC-DC development. I have simulated type-3 given in intersil document which i have attached. But whatever i have simulated is bit revese and stange also. So please can some one eloborate/help on this.
I don`t know if
Analog Circuit Design :: 28.04.2010 03:50 :: LvW :: Replies: 7 :: Views: 724
While using SG3524, for buck converter, I need to give a feedback to the error amplifier at pin 1. At the output of the error amplifier (pin 9) I have the Caps and Resistors for compensation. Do the capacitors here need to be ceramic disc capacitors necessarily? Or any specific type of capacitors?? Cannot I use Electrolytic aluminium capacitors? T
Power Electronics :: 02.09.2010 17:39 :: AbhimanyuSingh :: Replies: 3 :: Views: 716
These are different things. One stage OTA, or rather an amplifying stage with one high impedance node, that is meant to work in a feedback configuration is compensated by a cap to ac ground. If you have a 2 stage amplifier you also have two poles which in uncompensated state are kind of close to each other. You can still compensate by a cap to grou
Analog IC Design and Layout :: 21.09.2010 14:06 :: sutapanaki :: Replies: 2 :: Views: 1159
In one of consideration, for PFM with hysteresis type, the voltage ripple caused by ESR of output capacitor should be larger than the comparator hysteresis.
Analog IC Design and Layout :: 25.01.2011 20:11 :: leo_o2 :: Replies: 1 :: Views: 478
i have designed a small project which monitors the temperature
i went for K-type thermocouple due to its wide range of temp measuring
i used AD595 as the conditioning ckt for my project
K-type thermocouple to AD595 and form AD595 to PIC 16F877A ADC. this is how my project build...
i initially when i power-up my ckt . the temperature read by
Analog Circuit Design :: 06.02.2011 13:28 :: mutthunaveen :: Replies: 6 :: Views: 1465
I have a Photodiode that produce a ripetitive (but don't periodic) signal with an amplitude of any millivolts.
At this true signal there is an offset that canghe in the time with an amplitude around a volt.
I have supposed to reduce dinamically this offset with a circuit composed of an Programmable Gain Amplifier that amplif
Digital Signal Processing :: 25.03.2011 05:19 :: valeriogiampa :: Replies: 0 :: Views: 434
Can the RHP be dealed with the type III compensation, because the extra zero.
Analog Circuit Design :: 06.04.2011 15:50 :: bluesmaster :: Replies: 1 :: Views: 785
in general compensation of capacitors and resistors in error amplifier is done so that at cross over frequency at which overall gain will be unity the phase angle does not come at 360 degree. i.e. there should be some phase margin plus at cross over frequency the resultant gain slope should be of -1 type (-20db/decade). of course you have to read a
Power Electronics :: 22.09.2011 07:43 :: ElectroPhysics :: Replies: 2 :: Views: 567
Thanks for the help!
I'll compensate it with type II compensation network. However I have one more question.
The attached figure shows the bode plot for the same converter in DCM. However I've changed the small signal feedback gain a bit. Green line corresponds to k=0.1; blue line to k=0.15 and red on to k=0.2.
Simulations (using ideal com
Power Electronics :: 19.12.2011 08:28 :: pikulin03 :: Replies: 4 :: Views: 1936
if I use a type B thermocouple, which gives 0V between 0 °C and 50 °C, is needed the cold junction compensation? if yes what is its temperature coefficient?
Thank you for reply.
Robotics and Automatics Forum :: 03.08.2012 12:54 :: rbacchi :: Replies: 10 :: Views: 1825
To me this looks simply like "feedforward compensation" in
the feedback ladder. You see it often enough in regulators.
Also called "type III" compensation. There should be no DC
term, then your concerns about temperature drift (from that)
go away. PSRR should be improved at medium frequencies
where you are making better use of amplifier (...)
Analog Circuit Design :: 07.06.2012 11:31 :: dick_freebird :: Replies: 2 :: Views: 769
Hi! I have a thermocoupler K-type. I want to connect it to ADC input of a microcontroller, so I can measure temperature. Could someone post a schematics how to do it??? I`ll measure room temperature with 1 degree tolerance. Thanks!
Microcontrollers :: 11.08.2012 11:41 :: stoyanoff :: Replies: 6 :: Views: 716
What battery type you use in your system or plan to use?
Microcontrollers :: 27.08.2012 08:38 :: tpetar :: Replies: 2 :: Views: 315
Hi - I'm working on a design that uses a Linear LTC1700. I'm trying to choose values for the parts that sit on the ITH pin, but just want to make sure I'm understanding the type of network that it is using. Looking at the block diagram on page 6, it looks like it has an error amplifier wi
Analog Circuit Design :: 13.09.2012 01:54 :: uoficowboy :: Replies: 1 :: Views: 249
it depends on the load type, but usually some type of isolation is necessary to prevent electrical shocks. the simplest yet high performance feedback isolation is opto-coupler which consists of a voltage reference (e.g. TL431) and an error amplifier (opamp or TL431 itself). also compensation could be done in the secondary side.
Power Electronics :: 02.12.2012 05:12 :: goodboy_pl :: Replies: 2 :: Views: 356
stability is the inverse of the Q factor of the circuit, so higher the Q , more stable is possible.
Crystals have a Q of 10,000 to 100K for different cuts on the crystal ( AT cut vs SC cut)
Watch crystals used lower Q but not MEMs tuning fork is same as watch crystal 38KHz so these are cheaper and used now for watches and PICs
Hobby Circuits and Small Projects Problems :: 20.04.2013 23:50 :: SunnySkyguy :: Replies: 1 :: Views: 279
i think you can do it in another way. First you must know what type of temp sensor you have, e.g. pt100, type of thermocouple (J K S or so on).
Then look at Maxim and Linear Technologie or other manufactors for special chips for themperature measurement. There are some chips on the market with this feature.
For example: you have
Professional Hardware and Electronics Design :: 25.07.2002 01:29 :: Roscoe :: Replies: 7 :: Views: 2266
AD594 for J type
AD595 for K type thermocouples...
you can get 10mV/Celcius easly.
Hobby Circuits and Small Projects Problems :: 22.07.2004 17:31 :: Sobakava :: Replies: 5 :: Views: 7016
Although the switched capacitor circuits considered so far can be analyzed with reasonable effort manually, more complex switched capacitor circuits will become a challenge. To provide a way to meet this challenge and to confirm the hand analysis results, Some scholars developed
z-domain models of switched capacitor circuits. These model
Analog IC Design and Layout :: 03.01.2004 21:34 :: ynhe :: Replies: 7 :: Views: 2602
Usually if you want large gain with a low supply voltage, you must use (at least) a two-stage amplifier. Eventually gain boosting techniques may be used in the first stage.
However the feasibility and choice of architecture depend on a number of requirements:
- type of load (just capacitive/ just resistive / both)
- type of feedback (resisti
Analog Circuit Design :: 30.03.2004 10:25 :: maxwellequ :: Replies: 13 :: Views: 2389
before you layout you must read the layout rule carefully,the cap's type depands on it
Analog IC Design and Layout :: 28.09.2004 06:14 :: zx2051 :: Replies: 17 :: Views: 2782
for simple and low cost applications, ring oscillators with +/- 20% (with thermal compensation) can be generated; ofcourse the frequency can be very high (up to GHz) to very low (KHz) with freq dividers.
for more accurate ICs like uC, simple Xtal oscillator can be made by only one inverter(NOT Gate) and two external capacitor to form a colpits li
Analog IC Design and Layout :: 12.08.2004 19:32 :: goodboy_pl :: Replies: 1 :: Views: 1622
I think that it should not be oscillation. Because as u apply input to ur amp, the unwanted signal will appear. But as u remove the signal source, the unwanted signal vanish. For "oscillation", even remove the signal source, the unwanted signal will still exsit.
U mention that u using miller compensation. I don't know what type of
Analog IC Design and Layout :: 13.12.2004 00:14 :: purefen :: Replies: 2 :: Views: 823
Coaxial filter... do you mean connectorized?
If yes, for Cavity type like comb, interdigital, cavity coupled etc. the main improvement is use low CTE metal alloys. Common metals or metals alloys like Cu, Al alloy, brass, iron alloy etc has CTE in the range 15...30 ppm/°C, while exotic alloys may have 6ppm/°C or less.
Also reduce as possible t
RF, Microwave, Antennas and Optics :: 31.01.2005 04:18 :: sergio mariotti :: Replies: 4 :: Views: 601
FOR ?5v power supply, i think the process must be selected carefully.
for other spec. , the type amplifier is so simple.
first, you can use the cascode differential input stage , and the common source as the second stage.
the miller compensation is enough.
Analog IC Design and Layout :: 04.03.2005 21:00 :: jiangwp :: Replies: 11 :: Views: 1839
I hope both resistors are of the same type.
And then in fabrication if both would vary by same amount.
Analog Circuit Design :: 01.03.2005 04:58 :: ambreesh :: Replies: 3 :: Views: 824
My case is in bipolar tech, so flicker noise due to mos is not concerned. as i know, bipolar as tail has more merit than mos, right?
as i use wildlar PTAT to generate current, the largest noise contricution due to RES, which between the common mode point and bipolar, as high as 20%, i have reduce it's value to 500 ohm and it's still the main contr
Analog IC Design and Layout :: 16.08.2005 23:42 :: pigkiller :: Replies: 7 :: Views: 1729