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do you mean a 2-stage fully differential op-amp? what is your amplifier architecture? which type compensation?
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?
hello 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. 4N35 datasheet:- Page 2 (top) of this shows type 3 compensation
members, 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. Regards, Bharat
Can the RHP be dealed with the type III compensation, because the extra zero.
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
Hi, what are poles and zeroes in a compensation network like type-3 compensation for 2 stage cmfb amp. how we can boost phase margin without affecting Bandwidth. by using miller compensation cap, BW decreases. thanks Safiya
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
In what type of applications you use this law? I have never heared for it.
Hi all What is the compensation network used for ? There are type I ,II and III, what's the difference ? Thanks --------------- chmr
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 (...)
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 .
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
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.
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) ? Thanks.
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 compensation.
hi, 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.
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
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?
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. search on
Hi All 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 (...)
dear friends 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
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
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. Ni Hi Ni1009, I don`t know if
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
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
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.
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
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
Dear amu_cpln, 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. Roberto
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 (...)
Hello, Please, I am in the process of designing a 20 to 400V dc-dc converter but I don't know which type of feedback to use. Should I use an opto-coupler Isolated feedback or can I use a direct feedback consisting of voltage divider network at the high voltage side. I am using SG3524 for PWM control of the converter. Please, any suggestion is welc
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 Temperature eff
I have recently been tasked with designing PCB's for Ethernet Connectors. This can either be a PCB internally within the connector, or a PCB where the RJ45 Jack is mounted. Most PCB's are Double sided and the internal version has no GND. In both cases, it seems that using interdigitated capacitors i.e. finger tracks between certain pins can he
Dear friends , I need to make a j type temperature controller . PLease suggest me how to proceed , never used one before . 1. I need circuit used for j type thermocouple signal amplification using opamp op07 and diode for cold junction compensation , I have seen temperature controllers using thermocouples in mkt and they use a diode (...)
The transfer function of the type II compensation network is discussed in the linked IRF datasheet on page 29. R6 can be used to set the amplifier gain, but it doesn't affect the frequency characteristic (the poles and zeros). A more detailed discussion of different error amplifier compensation schemes can be e.g. found in the (...)
hi i need help for To interface J type thermocouple to PIC16F877 and also want to display it to the lcd16X2 display. i want to use inbuilt ADC for the analog to digital conversion of given thermocouple.
hello everybody i am facing a problem with type array of array. below i have given a simplified version of the problem --package my_pak type my_typ1 is array (0 to 1) of std_logic; type my_typ2 is array (0 to 1) of my_typ1; --entity declaration use work.my_pak.all; entity .... port( out_put : out my_typ2; (...)
Hallo, i have a Character Display 4 x 20 - 20 ° +85 ° with a Voltage DOUBLER on board. i need a shematic for temperature compensation for the Contrast of the Display the voltage range is 0 V till 5V Can somebody help me
Hi everybody, I am just collecting the schematics, how to build and build-in the RDS into FM receiver of older type. The dimesions do not play the role. I think about somethig special: like "unusual" display. Maybe some of You have interesting infos or links? :P
Hi techi, 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
I need modulate carrier 2.4GHz by signal bandwidth 7MHz, transmit-receive and demodulate. What type of modulation should I use. I want to get simple and low cost device. If you have any suggestions, scheme I will be grateful. Thx, Blekot
How easy is it to make a DIY type of a flash drive (also called as thumb drive or pen drive) of say 16MB capacity? Are there any circuits available for the same? bimbla.
AD594 for J type AD595 for K type thermocouples... you can get 10mV/Celcius easly.
Hi, Does anybody working in the field of jitter compensation in SDH -> PDH Desync? Need some help there...
There are several manufacturers that supply high speed D type flip flops. The links below show data sheets for a couple of chips that should do the kind of job you
Would any people like to introduce me some good book or material,which describe the detail of DC offset compensation feedback of multistage-amplifier? I am currently working on high-speed limiting amplifier, however still not clear about the usage of the DC feed-back. Personally, I think it make the circuit operating poi
I´m working in a USB design based in EZ-USB chip AN2131 of Cypress. This board must be connected to a PC and I need a type A male connector for PCB mount. I can´t find this connector in the web, please if anybody have a part number o any information please say me. Thanks and regards. 8)
Which type of notch filter (15 MHz BW) is best suitable for GSM band. Which simulator shoul I prefer. I am thinking to start with Parfil and check with Sonnet. Is it ok? I need to reduce the insertion loss. I want to choose stripline with air subtrate and thick lines and shorted or taped interdigital config. Is it OK? Do you have any practical
Television is mainly by Chassis type and Video by Model type