电压比-频率变换器.ewb

EWB实例

Electronics Workbench Circuit File
Version: 5
Charset: ANSI
Description: 
"该电路的输入为两个正电压Vn和Vd，其输出为与TTL 电平兼容的脉冲串，他们的重复频率与电压比Vn与Vd成正比。满刻度频率约为100Hz,线性误差低于0.5%。输出频率F。=KVn/Vd,若R2=R1,则式中K=1/4R2C1,运算放大器ICIA交替地对Vn/2-Vn/2进行积分，产生锯齿型电压输出，该电压在Vd和零电平之间斜变。晶体管Q2把ICID的输出变换到与TTL兼容的逻辑输出电平。把Vd调定到1.00V，则得到一个线性电压-频率变换器（F。=KVn),当把Vn调定到1.00V,则得到一个互易的电压-频率变换器（F。=KVn)。" 
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