简单的脉冲发生器具有低部分计数

摘要： 几个运算放大器和一些外部组件，您可以构建脉冲发生器与变频和工作周期。
Maxim/Dallas > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS AUTOMOTIVE

Keywords: pulse generator, VCO, voltage controlled oscillator, op amp, operational amplifier, frequency, Mar 26, 2003
square wave, opamp, op amps

APPLICATION NOTE 1960
Simple Pulse Generator Has Low Parts Count

With a few op amps and some external components, you can build a pulse generator with variable frequency
and duty cycle.


The natural choice for generating a pulse of variable frequency and duty cycle is a good bench-top pulse
generator. If you don't have a generator or must build one into your system, however, you can do it with a few
op amps and some external components (Figure 1).




Figure 1. This simple and versatile pulse generator includes only 15 components.


U1 and Q1 form a voltage-c