论文部分内容阅读
目前大多数方波发生器中,要改变频率而不影响占空因数是非常困难的。但本文所述的这种电路,能够做到改变振荡频率而不显著地改变振荡的占空因数,而且占空因数也可调节.这种电路的主要特点是,它仅包含一只运算放大器作为主要元件。工作使用单一正电源,使电源结构简单。电路的工作原理具体线路如图所示,T_1为5GOP07低噪声运算放大器。T_2和 T_3为3DK4三极算。门1,2,3,为反相器,可用 CC4068。当 T_1输出高电位时,调节 R_6使 T_3饱和导通。当 T_1输出低电
At present, most square wave generator, to change the frequency without affecting the duty cycle is very difficult. However, the circuit described in this article is able to change the oscillation frequency without significantly changing the duty cycle of the oscillation, and the duty cycle is also adjustable.The main feature of this circuit is that it contains only one operational amplifier as The main components. Work using a single positive power supply, the power supply structure is simple. The circuit works as shown in the specific line, T_1 5GOP07 low noise op amp. T_2 and T_3 are 3DK4 ternary calculations. Gate 1,2,3, for the inverter, available CC4068. When T_1 is high, adjust R_6 to saturate T_3. When T_1 output low