simulations in matlab especially about filters and a project about the wien bridge signal generator(n=3)

这时一个文氏桥信号发生器电路仿真图，改变数值可输出不同的波形。-When a signal generator wien bridge circuit simulation diagram, change the value may be different from the output waveform.

This report consists of describing the design and assembly of a filter circuit active low pass of 4th order Butterworth. The circuit is designed for cut-off frequency of 1 kHz and gain in average frequencies of 10 dB. From the analysis of the meas