Questions tagged [miller-integrator]

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LHP zero in voltage buffer compensated opamp

I am observing a LHP zero for the following miller compensated opamp with a unity gain buffer in the miller feedback loop. I am not intuitively being able to analyze the source of this zero. Would ...
166 views

Which $\frac{V_{out}} {V_x}$ is correct here? Mine or the author of the book?

The following is from the book Design of Analog CMOS Integrated Circuit, Page 177. "Determine the transfer function of the circuit shown in Fig. 6.9(a) using (a) direct analysis and (b) Miller’s ...
• 919
1 vote
101 views

Calculate the input resistance of the circuit with Miller's Theorem

The following is from the book Design of Analog CMOS Integrated Circuit, Page 176. Calculate the input resistance of the circuit with Miller's Theorem. In order to calculate the gain. The current \\$...
• 919
2k views

Reasons to use charge amplifier?

Here are some preliminary information before asking the question: When piezoelectric force sensors are subjected to a stress, they produce a charge that is proportional to the force. The amount of ...
• 1,885
1 vote
326 views

Does slew rate specification of an op amp remain valid for an integrator configuration?

I am trying to design an op-amp integrator for a Rogowski Coil based current sensor. The op amp I use is THS4631D from Texas Instruments. It has a slew rate of 1000 V/us according to the datasheet. ...
1k views

What is this circuit called, and what is it used for?

I analyzed this circuit and found that it's an inverting amplifier and that the impedance of the circuit goes to zero when the frequency of the input voltage goes to infinity. Does anyone know the ...
1 vote
295 views

Why is my op-amp integrator charging up to the DC voltage supplied (instead of the rails)?

This is the op-amp integrator I am simulating. Theoretically I should get a ramp signal saturating at the op-amp rails, however I get the signal shown. Can anyone help me understand why?
1k views

How to remove the DC offset from the output of my op-amp integrator?

I am trying to simulate an active integrator for Rogowski coil based current sensing application. The following is my circuit. Rogowski coil with active integrator: The current to be sensed is ...
1 vote
379 views

Settling time of an op-amp integrator

I am trying to simulate an op-amp integrator with a high bandwidth op-amp LTC6253. When I apply a 2mv-p2p signal centered at zero voltage, the integrator settles with an exponential voltage envelope ...
201 views

Does the op-amp integrator drift error due to offset voltage and bias currents depend on the configuration inverting or non-inverting?

I have made the following two circuits to check for integrator drift errors in LTSPICE. I have grounded both inputs, so that only the offset voltage and bias currents are integrated. I expect ramps as ...
1 vote
391 views

Differential integrator vs standard

I want to integrate/amplify a very small signal (relatively short pulses of 100ns to 4ms, necessitate high-bandwidth components minimum 40MHz+). The capacitors will be switched (shorted) when not in ...
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