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當前位置:首頁 » 博揚智能資訊中心 » 其它 » 如何設計二階低通濾波器和儀表?

如何設計二階低通濾波器和儀表?

發表時間:2021-04-01 17:48【 閱讀量:-查看手機網址
掃一掃!如何設計二階低通濾波器和儀表?掃一掃!

波特儀顯示的是輻頻和相頻特性,你的輸入頻率固定的正弦,在波特儀上顯示內的應該只有一個點把輸入波形變的容更復雜一點,你換成周期的沖激信號看看,這樣頻譜就是周期連續的了下面是算出來的波特圖:直流增益是2,你看1Hz基本還是2倍,你要把頻率放大一點才可以另外你這個濾波器,輸出相位超前哦,要改改,起碼要變成滯后的,否則不穩定容易震蕩,所以算了下這濾波器的傳遞函數,極點的兩個根:32+56i 和32-56i,果然全是正的,發散的不行了。。_輸入為單位沖激信號的輸出信號沖激響應: 32t e(56t-pi/2)*i-(56t+pi/2)*iVo= -----------  ( e + e ) 56要不了幾百個毫秒就到KV了這樣的電路我相信再接其他電路后竄到KV級是正常的。需要重新修改RC參數。

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