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[SOLVED] Low Voltage DC Level Shifter

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IntuitiveAnalog

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Hi everyone,

I am designing a circuit whose output I have attached (Amplitude is 100mV and Frequency is 20kHz). I want to shift this output to 0.5 V DC level. I will be thankful if anybody could suggest me a DC level shifter for this scenario.(Particularly I am looking for a mosfet based circuit.)

Thanks

 

Your output looks as a analog signal so add a simple summing amplifer with 2 input voltages. The first input voltage should be the output voltage which you have shown. The second should be the constant 0.5 Volt.
 

Just add 2 resistors. If the AC source amplitude is Vac and you want to add 0.5V, first determine a DC supply value, say 5V.

Just as BradtheRad says, a voltage divider between two voltage sources will generate a summing of both signals with some attenuation. To supress that total AC attenuation you must amplify it before the divider.
 
Another option: AC couple with a cap, then shift to whatever voltage you want. Unless it's very slow this is quite easy, and won't attenuate (<<1%) with proper component selection. But it will have some start up time and won't work for DC.
 

Hi zulqar,

Amplify the signal by using CS stage then buffer the signal by using DC level shifter.

Thanks
Rajkumar S
 

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