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81 Threads found on edaboard.com: Integrator Amp
Hello, I will have to design a dual slope ADC with 11 Bits. Can anyone help me how should find the gain of the amplifier of the integrator so that I can design op amp accordingly. More over I am not sure how to find the range of input voltages which can give a conversion rate of 1k/samples. Thanks Pritha
Hello, i searched a reset-circuit for an opamp integrator and I found the following one. 132917 I donīt understand why resistor R4 and the diodes are there? Do I need them to protect the JFET or to keep sure it doesnīt switch on accidentally, because my Gate always
Hi, I need help to determine the op amp gain required to match certain ADC specifications. I need to design a delta sigma 14 bit ADC and need to find out required op-amp gain for the integrator design. Is there any certain formula to find out that
Is your load located on or off the pcb? The load is where you connect a power-carrying 0V ground wire. If the load is off the pcb, then the pcb may not need to have a power-carrying 0V ground wire on it. for example the positive input of the integrator amp-op Yes, this needs a 0V ground wire. It is a good idea to keep it separate f
The simple equation for Rogowski coil sensitivity can be found everywhere in literature, e.g. here Rogowski coils is a dI/dt sensor, the scale factor must have a unit of V*s/A not V/A. Multiplying the scale factor with the integrator "gain" 1/T gives the overall sensitivity.
Dear all, I am trying to make an integrator to calculate inductance current. from; VL = L.diL/dt -> iL = integral(VL) / L When i divide integrator output with L, i dont get the value i should have. - does anyone know how to select R and C value of integrator, i guess mines arent correct. - Any ideas? thanks a lot. best regards
I need an integrator that will handle +100v output. This is a serious problem due to the lack of high voltage opamps. It's my understanding that integrators need to be unity gain stable. Would this opamp work? It seems to show unity gain capability under the "gain and compensatio
Your request is unclear. 12 to 0 >>> 0 to 5V inverts the non-inverting integrator. Pls clarify and the requirements for clamping the output, as well as not exceeding the input common mode range of the Op amp with a reduced Vcc.
Put it inside the classic op amp measurement loop, let it chatter and look for 50% duty (via the integrator threshold). That's how we did it and I believe how it still gets done, on production ATE. Open loop DC or triangle wave stimulus can get you close but not any decent accuracy / repeatability.
you do not show whole circuit so it is difficult to help you. But your connection to comp pin is wrong, it should be as an integrator, you are just using the internal error amp as an amplifier.... Also, your vin is a pulsed voltage? Also, you use 1n4007 in RCD clamp, this not good, you must use ultra fast diode there. Do (...)
You are going to have "binning" of results due to the clock and the only way to better resolution is a slower ramp or a feedback test loop (attenuator and integrator).
Hello Everyone, i am designing a boost converter analog controller using P&O technique i need an analog circuit works as accumulator instead of integrator ... because the integrator slop changes slightly and it make problems in my design so any on can help me also if any one used an integrator before can tell me who to optimize its (...)
What is U5 supposed to do? You have the inputs connected with two 100 ohm resistors and no feedback so the output will saturate just due to the input offset being amplified by the open-loop op amp gain. The second stage is an integrator with no reset circuit so that will also go to saturation due to input bias current. So what is the (...)
The LM741 opamp has a very old design and has horrible high frequency response and slew rate. The extremely low value for some of the output and feedback resistors (R4 and R2) overloads the opamps. The value of R5 is so low that opamp U1 is not an integrator.
Hello, I am trying to design and simulate a linear ramp generator using an op-amp to be used as part of a timing circuit. The basic block consists of an integrator. The input voltage is either a 0V or 5V supplied through a micro-controller When a 5V is supplied to the circuit the output voltage should ramp down (...)
That picture just shows a varying pulse width signal converted to a ramp, not a PWM signal. If you want to do than then feed the pulse into an op amp integrator circuit with a reset circuit to discharge the integrator capacitor at the end of the ramp. What is the frequency and pulse-width of the pulse?
In analog, use op-amp integrator to run integral over value of input v(t) and then use inverting amplifier to multiply with Hp and find vk. In digital, simply convert v(t) to digital using ADC in uC as fast as possible at periodic interval, do this for time t=- using internal timer for uC and keep on accumulating value of v(
With an output impedance being high on op amp the capacitance on coax at 30pF/ft may cause LPF effect. You may not care with an integrator, but some high capacitive loads can might cause ringing in " some" OA's. The scope 1M load is not significant. If you want a lower impedance source to match impedance of cable, you could attenuate 5k to 50Ohm a
I had just downloaded the jumbocad. I want to simulate my flyback converter. However its magnetic core model didn't work. The jumbocad schematic provide a lot of functional block such as gain, differentiator, integrator, multiplier, limiter, voltage & current source.....etc. I want to create my transformer and PWM model using the functional bloc
100607 In the above is a exam question asking if the input wave and output wave are given, design a circuit with op-amp to realize it. The solution finds R1 * C2 by considering period and voltage, which I can understand. However it says we needs R2, and must make sure R2 * C2 is 100 times of the lowest frequency whi