Pulse Width Modulation ( 4 ) :

The Pulse Width Modulator (PWM) is a very useful circuit that outputs a variable duty cycle at a fixed frequency (duty cycle is usually controlled using external control signal, potentiometer or using numericalcontrol). The PWM is very useful in applications like wave generation,motor control and DC power controlling systems. With the aid of a filter, smooth analog waves can be generated usign PWM method.

• Circuits provide 4- to 20-mA PWM control - are useful when you use 4- to 20-mA current-loop signals to control a PWM signal   
• Generator features programmable duty cycle - you can program the duty cycle of this simple pulse generator's output   
• Pulse Width Modulators - generating PWM waveform is extremely simple with the circuits shown in this page, all circuits are DC control voltage in and PWM out   
• PWM circuit uses one op amp - circuit delivers a rectangular signal with duty cycle varying between 0 and 100% in response to an input signal varying from 0 to 5V dc   

 back to : Links >> Electronic Circuits >> Oscillators