Position: Index > Filter Circuit >

1_kHz_4TH_ORDER_BUTTERWORTH_FILTER

2017-02-20 19:49  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.


1_kHz_4TH_ORDER_BUTTERWORTH_FILTER
1_kHz_4TH_ORDER_BUTTERWORTH_FILTER
1_kHz_4TH_ORDER_BUTTERWORTH_FILTER
1_kHz_4TH_ORDER_BUTTERWORTH_FILTER
1_kHz_4TH_ORDER_BUTTERWORTH_FILTER
1_kHz_4TH_ORDER_BUTTERWORTH_FILTER
The filter is a simplified state variable architecture consisting of two cascaded 2nd-order sections. Each section uses the 360° phase shift around the two op-amp loop to create a negative sum-ming junction at Al's positive input. The circuit has low sensitivities for center frequency and Q, which are set with the following equations:where,The dc bias applied to A2 and A4, half supply, is not needed when split supplies are available.The circuit swings rail-to-rail in the passband making it an excellent anti-aliasing filter for A/Ds. The amplitude response is flat to 1 kHz then rolls off at 80 dB/decade.