PWM VS ADC !!! help plz!!!!

[tech_vaibhav_eee]

what is the difference btw PWM and ADC since both r used to convert a analog signal into a digital one????

 

[ahmedragia21]

PWM + Low pass filter is like a DAC

 

[tech_vaibhav_eee]

still not clear....does adc(analog 2 digital converter) and pwm(pulse width modulatoor) have same application??

 

[crutschow]

ADC stands for Analog to Digital Converter which is a general term covering all forms of such converters. Types of ADCs incude Sucessive-Approximation, Integrating Ramp, and Sigma-Delta. ADCs are used when you want to convert an analog signal into digital form (generally a series of digital numbers).

PWM stands for Pulse Width Modulation, a type of digital modulator, which converts an analog signal into a series of digital pulses. It's commonly used in switch-mode DC power supplies and class-D audio power amplifiers. It's also often used by microcontrollers as a simple way to generate an arbitrary analog signal by filtering the pulses. The average value of the pulses equals the desired analog voltage.