Translate An opAmp integrator to a OTA-C one

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In summary, the conversation discusses how to create a filter using an OTA-C integrator instead of an OpAmp based integrator. The question is how to maintain the same behavior when transitioning from one to the other, specifically in terms of translating the RC values. The OTA will be a simple differential pair with resistors as loads.
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Turin231
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I have a fliter that uses OpAmp based integrator. I want to make the same filter but using OTA-C instead of opamps. But I'm confused on the process of doing that. Anyone can help me on how to get the same behavior from the transition from one to an other?In other words translating the RC values in the omAmp version into the OTA version with the same behaviour

OpAmp integrator

http://www.art-sci.udel.edu/ghw/phys245/05S/classes/images/opamp-integrator.gif

OTA-C integrator

[PLAIN]http://img838.imageshack.us/img838/7088/otacinter.jpg

The ota will be a simple differential pair with resistors as loads.
 
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  • #2
Turin231 said:
I have a fliter that uses OpAmp based integrator. I want to make the same filter but using OTA-C instead of opamps. But I'm confused on the process of doing that. Anyone can help me on how to get the same behavior from the transition from one to an other?In other words translating the RC values in the omAmp version into the OTA version with the same behaviour

OpAmp integrator

http://www.art-sci.udel.edu/ghw/phys245/05S/classes/images/opamp-integrator.gif

OTA-C integrator

[PLAIN]http://img838.imageshack.us/img838/7088/otacinter.jpg

The ota will be a simple differential pair with resistors as loads.

Welcome to the PF!

What's an OTA? What is the context of the question? (School project, personal project, etc.)
 
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  • #3
This may be part of a university project..


OTA: I mean operational trans-impedance amplifier.
 

Related to Translate An opAmp integrator to a OTA-C one

1. What is an op-amp integrator and an OTA-C integrator?

An op-amp integrator is a circuit that performs mathematical integration of an input signal. It consists of an operational amplifier and a feedback capacitor. An OTA-C integrator is a similar circuit, but it uses an operational transconductance amplifier (OTA) and a feedback capacitor instead.

2. What are the advantages of using an OTA-C integrator over an op-amp integrator?

OTA-C integrators have better linearity and can handle a wider range of frequencies compared to op-amp integrators. They also have lower input offset voltage and noise, making them more suitable for precision applications.

3. How do I convert an op-amp integrator to an OTA-C integrator?

To convert an op-amp integrator to an OTA-C integrator, you will need to replace the op-amp with an OTA and modify the feedback capacitor accordingly. You may also need to adjust the values of other components in the circuit to ensure proper functionality.

4. Can I use any OTA in place of an op-amp in an integrator circuit?

No, not all OTAs are suitable for use in an integrator circuit. You will need to select an OTA with a high gain-bandwidth product and a low input offset voltage to ensure proper integration performance.

5. Are there any potential drawbacks to using an OTA-C integrator?

One potential drawback of using an OTA-C integrator is that it requires a separate power supply for the OTA, which may increase the overall complexity and cost of the circuit. Additionally, OTAs may have higher power consumption compared to op-amps, so this should be considered in low-power applications.

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