analog filters design issue

[priyadarshi]

hi i have to design a simple filter using common source amplifier with resisitive load and it is must to use it the how can it be done please help............... alot thnks in advance .............waiting.........???

 

[LvW]

Did you realize that there are some different filter types? (lowpass, highpass,...).
When you have no further specification, the common source stage its already a filter (low pass due to falling gain at high frequencies).

 

[priyadarshi]

yes you are right i have'nt specified it completely but a common source amplifier is open loop system and filter cant be realised as open loop. so how a closed loop system can be realised for a filter using common source amplifier

 

[LvW]

yes you are right i have'nt specified it completely but a common source amplifier is open loop system and filter cant be realised as open loop. so how a closed loop system can be realised for a filter using common source amplifier

Did you hear about RC or RLC networks? All are open-loop filters.
However, when you are required to design an active filter with feedback, you should give some more information (lowpass, highpass? ; Filter order? ; pole frequencies?)

 

[priyadarshi]

ohk sir ,thnks a lot for your reply and you are right actually i am new to analog design and doing my thesis on bulk driven analog design, initially i was afraid of doing thesis in analog but now i feel it is interesting although very tough.
so i will revert back with proper specs thnks again. i have visited your replies on other post on filter issues they are helpful and i have downloaded the attachments.