I have design a filter using 1mh choke and 1nf capacitor but still there is 2volts ripples at the output and i need 0.14v ripples at the output. how can i suppress these ripples.

 

I have design a filter using 1mh choke and 1nf capacitor but still there is 2volts ripples at the output and i need 0.14v ripples at the output. how can i suppress these ripples.

What kind of filter? Schematic please.
What is your input to the filter?
What is the maximum ripple that you can tolerate?

 

What frequency/voltage/current?

 

Filters do not eliminate noise or ripple they only reduce the amplitude of them.

How much they are reduced is subject to an appropriately designed filter taking into account the input signal and output requirements. You have neither said what the input to the filter is nor the output requirements of the filter nor which filter configuration you are using - only given the value of two components.

Guess why there are so many types of filters.

 

I have design a filter using 1mh choke and 1nf capacitor but still there is 2volts ripples at the output and i need 0.14v ripples at the output. how can i suppress these ripples.

Filter Type: LC filter
Input: DC with ripples of 2 volts
ripples that can tolerate at the output: 0.14 volts
Input/Output : voltage

 

I have design a filter using 1mh choke and 1nf capacitor but still there is 2volts ripples at the output and i need 0.14v ripples at the output. how can i suppress these ripples.

Filter Type: LC filter
Input: DC with ripples of 2 volts
ripples that can tolerate at the output: 0.14 volts
Input/Output : voltage

Sounds like you are building rectifier.

Filter is whole different thing.

 

So what should I do to reduce the input ripples of 2volts to 0.14v at the output

 

So what should I do to reduce the input ripples of 2volts to 0.14v at the output

Use a smoothing capacitor.

 

If the input voltage is 27 volts with ripple voltage of 2V. then what should be the value of smoothing capacitor to reduce the ripples up to 0.14v

 

Google ripple voltage:

http://en.wikipedia.org/wiki/Ripple_(electrical)

For a full-wave rectifier:

Vpp = I/2fC

For a half-wave rectification:

Vpp = I/fC

where

Vpp is the peak-to-peak ripple voltage
I is the current in the circuit
f is the frequency of the ac power
C is the capacitance

 

The input voltage of 27v having the ripples of 2 volts comes from the solar panel and it is DC not AC. IF the input is DC then what should be the formula of smoothing capacitor to reduce the ripples up to 0.14 volts

 

Maybe the sun is rippling?

 

With filters of any kind it is very important if not essential to know the frequency of the desired signal. And of the undesired signal. Do you know what those are in your case?