Hello everyone.
Im currently constructing the 4th order sallen key low pass filter with 500Hz cut off frequency as shown in this attached figure. Im also constructing a 4th order sallen key high pass filter with 100 Hz cut off frequency. Im cascading the low pass filter and high pass filter to form a 8th order band pass filter with frequency range from 10Hz to 500Hz.
Im not sure what type of film capacitors (polyester or polypropylene) should I use for the 3 nanofarad capacitors in the low pass filters and 33 nanofarad capacitors in the high pass filter. Or should i use ceramic or monolithic capacitors instead to implement this band pass filter? I am using Texas Instruments OPA277 precision operational amplifiers.
In Malaysia where im at we have a branch of Farnell-Newark electronic parts supplier but no Mouser or digikey.
Im currently constructing the 4th order sallen key low pass filter with 500Hz cut off frequency as shown in this attached figure. Im also constructing a 4th order sallen key high pass filter with 100 Hz cut off frequency. Im cascading the low pass filter and high pass filter to form a 8th order band pass filter with frequency range from 10Hz to 500Hz.
Im not sure what type of film capacitors (polyester or polypropylene) should I use for the 3 nanofarad capacitors in the low pass filters and 33 nanofarad capacitors in the high pass filter. Or should i use ceramic or monolithic capacitors instead to implement this band pass filter? I am using Texas Instruments OPA277 precision operational amplifiers.
In Malaysia where im at we have a branch of Farnell-Newark electronic parts supplier but no Mouser or digikey.