[General] How to add DC offset to PWM signal using passive elements

[Veeresh PS]

Hi all,

I am driving an LED for brightness control. I want give an offset of 500mV to the signal.

Please give some idea how can I do so using only passives.

Thanks in advance.

 

[KlausST]

Hi,

change it on the digital side: add the offset to the output code for the PWM

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if you need to do it in analogside, then we need more information, like PWM output voltage, PWM frequency, duty cycle range,
and additionally your circuit diagram would be helpful.


Klaus

 

[Veeresh PS]

Hi Klaus,

Thanks for your reply, I could add offset to PWM using opamp voltage follower with +ve terminal is being referenced to required offset required and -ve terminal is fed with PWM signal.

Veeresh

 

[KlausST]

Hi,

your circuit diagram would be helpful

Klaus