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8. 5. 2 三角波发生电路 一、电路组成

C. R 3. R 4. -. u o1. A 1. u o. -. A 2. +. +. u +. R 2. R 5. R 1. VD Z. 图 8. 5. 2 矩形波发生电路. 8. 5. 2 三角波发生电路 一、电路组成. A 1 组成滞回比较器， A 2 组成积分电路 在 A 2 的输出端得到三角波. 返 回. 下一页. C. R 3. R 4. u o1. -. u o. -. A 1. +. A 2. +. u +. R 5. R 2. R 1. VD Z. R 2. R 1. +.

laurence-lemaitre
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8. 5. 2 三角波发生电路 一、电路组成

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  1. C R3 R4 - uo1 A1 uo - A2 + + u+ R2 R5 R1 VDZ 图 8. 5. 2 矩形波发生电路 8. 5. 2 三角波发生电路 一、电路组成 A1组成滞回比较器，A2组成积分电路 在A2的输出端得到三角波 返 回 下一页

  2. C R3 R4 uo1 - uo - A1 + A2 + u+ R5 R2 R1 VDZ R2 R1 + u0 u+= uo1 R1+R2 R1 +R2 二、工作原理 初始条件：假设t =0时，uo1 = +UZ， 电容上初始电压为零， 上一页 返 回 下一页

  3. C R3 R4 uo1 - uo - A1 + A2 + u+ T R5 R2 2 R1 VDZ uo1 +UZ 0 t -UZ uo +Uom 0 t -Uom t =0时， uo1 = +UZ电容充电 uo随时间负向线性增长， u+随uo减小到0时， uo1跳变为-UZ，电容开始放电 uo随时间正向线性增长， u+随uo增大至0时， uo1跳变为+UZ，重复以上过程 上一页 返 回 下一页

  4. R2 R1 uo1 -UZ + Uom 0= R1+R2 R1 +R2 +UZ T 2 0 t -UZ R1 uo Uom =Uz R2 +Uom 0 t -Uom 4R1 R4C T = R2 三、输出幅度和振荡周期 电路仿真 上一页 返 回

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