Search Engine www.edaboard.com

Slew Rate In Op Amp

Add Question

30 Threads found on edaboard.com: Slew Rate In Op Amp
Rise and fall time of an operational amplifier is a large signal quantity and has to be measured with a respectively large output voltage, but you'll usually avoid output saturation. It has to be measured with a defined gain setting and output voltage. You'll wire the OP e.g. for G = +1 (or any reasonable value) and apply a square wave input sig
Dear Neo, Capacitive loads often give rise to problems, in part because they can reduce the output bandwidth and slew rate, but mainly because the phase lag they produce in the op amp’s feedback loop can cause instability. Although some capacitive loading is inevitable, amplifiers are often subjected to sufficient (...)
Klaus is correct. There may be be issues with the slew rate and output impedance of circuits providing the voltage to the ADC input but from there onward the sampling rate is only dependant on the type of ADC and with the exception of flash converters, it's clock rate. Vref only changes the full-scale (...)
Instead of equivocal numbers, I would prefer to see a test setup with in- and output waveforms, and in case of doubt a specification how the SR numbers have been derived from the output waveforms. I measured slew rate @ 3dB frequency How to measure a time domain parameter at a specific frequency?
How to design a 3 Terminal Operational amplifier on Multisim 13.0 to show the slew-rate including improvements
I would expect Vo= 4Vpp at least as shown in spec. What is your load R? 100? Beyond 4Vpp that THD rises and slew rate well below limit , what about lower frequency response? Does it saturate the same? 109011
Any time you specify voltage, high speed and logic, one also needs to specify impedance of source, load , capacitance and current. The fanout requirements for 1 gate load are trivial compared to level translator for a clock driver with 20 loads. The slew rate of your Op amp is probably the limiting factor in your design. CMOS is a (...)
Could you explain a bit why slew rate is calculated by that formula along with that assumption? I know that slew rate is defined as the maximum rate of change of output voltage per unit of time and is expressed as volt per second. However, the lecture below give that formula without any explanation is a (...)
The datasheet for an opamp shows its frequency response and slew rate. The maximum gain of an OP07 opamp at DC to 1Hz is 1 million. At 1kHz its max gain is 1000. At 10kHz its max gain is 100 but the slew rate limits the output to only 8V p-p.
Hello All, I need to calculate the Power Consumption and slew rate for a Two-Stage Unbuffered Op-amp using Tanner Eda . Kindly guide me for 1. what should be the input parameters for these calculations? 2. How could it be calculated on Tanner? any clue would be appreciated ........... THANKS :)
Hello, can anyone tell that whiich op amp would be faster in terms of "slew rate"? MCP602 has slew rate of 2.3V/us, MCP 3.0V/us and MCP6041 3.0V/ms. Thank you.
Hi, I need to know the effects of changes in GBP and slew rate of the op-amp on the output of the attached circuit. I tried to increase the frequency (in the simulation) of the input but i didn't notice any changes at the output except the frequency (obviously). I know it is something that has to do with the spice model. thanks
If an opamp has a slew rate of 0.8V/microsecond, the gain of opamp is 4, and at t = 0, Vin = 1V, and takes 5 microsecond to constantly increase to 2V. Will Vo take (4*2)/0.8 * 5 = 50microS to constantly increase from 4V to 8V at t=0? thanks in advance
In fact, it depends on your application. Generally, opamp spec are: input range, output range, min supply voltage, current consumption, slew rate, noise, offset, gain, phase margin, bandwidth, PSRR, CMRR.
Hi I am trying to simulate Op-amp Apex pa107dp using ADS.Help me in trying to get various parameters like gain,Bandwidth,CMRR and slew rate
In my opinion, the datasheet gives all necessary information. You would want to apply feedforward compensation for optimal phase margin and highest gain at high frequencies. According to the bode diagram, you can expect about 10 dB at 10 MHz. You should consider that the achievable large signal amplitude is very limited due to slew rate (...)
Hi sgugan, 1) CA3130 - 10V/us slew rate , 15MHz bandwidth. 2) TL081 - 13V/us slew rate, 3MHz bandwidth , cheaper and easily available compared to CA3130.
Hi all, I am new member in analog design session. I am designing op-amp two-stages. I have a question: when i run DC analysis, I have a DC response showing in attached picture What information can I extract form this DC
CMRR and PSRR are defined as small signal (.AC) parameters in my opinion, slew rate is .TRAN as said, voltage swing can be either a statical (.DC) or a large signal dynamic (.TRAN) parameter.
I have designed a fully differential op amp. I do not know exactly how to measure the slew rate for a fully differential op amp. Generally for a single ended op amp we connect the op amp in non inverting(feed back) mode and measure the slew rate. How to (...)
I understand that when a large step input is applied to the op amp this causes slewing because the diff amp's input transistors are in cut off/triode. As you can see that the output after slewing starts to ripple. During this rippling the transistors are in saturation and the error voltage Ve is decreasing due to (...)
Hi, I just finished the study in op-amps design from Razavi's book. However, I feel not enough in some topics like CMFB, slew rate and some other practical issues. Could you recommend me any other books like Allen or Meyer so that I can study further? Thanks a lot! Wang
Hi see these papers: "Am imporoved model for the slewing behavior of opamps" by Wang, Harjani "An accurate analysis of slew rate for two-stage cmos opamps" by Yavari, Maghari, Shoaei regards
Does anyone know how to alleviate the effect of slew rate in a single ended telescopic op amp(please see )? So far i know i can use coupling transistors but i am not sure where to put them.
The slew-rate of an op-amp is defined as the maximum rate of change of the output voltage for all possible input signals. where vout(t) is the output produced by the amplifier as a function of time t. slew rate is typically expressed in units of V/?s.
Hi In fact, specification of an Analog filter depends on application requirement. that is, if your filter does not have a large signal at its input, slew rate of the Opamp or OTA is not very critical spec. that is in most cases. to design Gm-C filters you can refer to John & Martin's book, Chap. 15. another good tutorial paper about (...)
The ideal op-amp For any input voltages the ideal op-amp has infinite open-loop gain, infinite bandwidth, infinite input impedances resulting in zero input currents, infinite slew rate, zero output impedance and zero noise. Regards, IanP
Hi, Measuring the slew rate in Cadence is similar to measuring it in other simulator. Close the feedback loop of the op-amp and apply a large step voltage to the input of the op amp, and measure the initial slope of the output. There is not a close relation between slew rate and (...)
read this short pdf. u could get some idea... it depends on the compensating capacitor
Hi, Does anyone know how to work out the CMRR (Common Mode Rejection Ratio), PSRR (Power Supply Rejection Ratio) and slew rate using Cadence simulator for a 741 Op-amp? Could anyone explain to me how to work out the differential gain of my op-amp using the Cadence calculator? Thankyou.