Very important question in switched cap integrator

[hoka_89]

first:
i want to put a dc input on a switched capacitor integrator how can i do this

second i make a sigma delta modulator and iwant to put the dac in the integrator and make the feed back bits to control the switches how can i do this

please i want anyone to replay to me

 

[berkeman]

first:
i want to put a dc input on a switched capacitor integrator how can i do this

second i make a sigma delta modulator and iwant to put the dac in the integrator and make the feed back bits to control the switches how can i do this

please i want anyone to replay to me

Welcome to the PF.

What is the application? Is this for schoolwork?

 

[hoka_89]

it is a graduation project

 

[berkeman]

it is a graduation project

Sounds like fun. I've moved the thread to the Homework Help, Engineering forum, which is where it belongs.

Now, can you please define some terms that you are using? At least to me, the terms are a bit off (it could be part of the language translation, or just a misunderstanding on my part or your part of the technical terms). Please write a bit about these:

** "a switched capacitor integrator"

** "a sigma delta modulator"

Once you define these a bit better, we may be able to offer some hints or pointers to sources of information to help you with your projects.

 

[DeeNos]

Hello,

Thank you for your question. In order to put a DC input on a switched capacitor integrator, you can use a DC-blocking capacitor in series with the input. This will block the DC component while allowing the AC component to pass through and be integrated.

As for using a sigma delta modulator with a DAC in the integrator, you can use the DAC to generate the feedback bits for the switches by connecting the output of the DAC to the control inputs of the switches. This will allow the switches to be controlled by the digital output of the sigma delta modulator, which can then be integrated by the integrator.

I hope this helps. Please feel free to ask any follow-up questions. Thank you.