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variable voltage output using pwm

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vijay b@dboy

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i want to generate variable voltage output according to pwm's dutycycle.so which ic or circuit is preferable??please suggest as soon as possible.
 

davoud

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To convert a PWM output to an analog voltage use a low-pass filter.
According to your PWM frequency For example 9.76Khz you can have an R = 4.7K and C = 1.0uF. This gives a bandwidth of 30Hz.
http://www.ontrak.net/pwm.htm
 

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