i have a project that is to design a schematic diagram for low pass filter in transistor level.the reason that i need the schematic diagram in transistor level is to design the layout.the question is,is there any schematic diagram of low pass filter (any type of low pass filter) in transistor level?i couldn't find any.can anyone help me?
thank you IanP,windmillkity and js.i'll try search in the website you gave me.
actually,i need to design a butterworth low pass filter.what i need is a circuit consist of transistors only.if i were to design a layout based on RC circuit,then it might be large and not suitable for my project.plus,i have 4/5 months only to finished this project.
Here is an example of a low-pass filter (in this case it is for video band) which you can modify by recalculating LC values for the audio-band ..
( **broken link removed** )
As you can see, the first stage is a simple buffer, whereas the last stage is an amplifier which compensates for passive filter loses ..
Regards,
IanP
hmm,it seems that all the circuit that you show me are all consists of resistors and capacitors.does anybody know how to convert the resistor and capacitor into transistor?is it possible to do so?