Mar 9, 2015 #1 G g9x Newbie level 1 Joined Mar 9, 2015 Messages 1 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Activity points 8 Hi, I have an AC signal that needs to have a precise DC offset (1v-10v AC signal + 0.5v DC offset) I am limited to single supply. What is the best way I could achieve this? any help is appreciated. thanks!
Hi, I have an AC signal that needs to have a precise DC offset (1v-10v AC signal + 0.5v DC offset) I am limited to single supply. What is the best way I could achieve this? any help is appreciated. thanks!
Mar 9, 2015 #2 ankitvirdi4 Member level 4 Joined Mar 13, 2012 Messages 70 Helped 4 Reputation 8 Reaction score 4 Trophy points 1,288 Location India Activity points 1,926 Hi! Try using a summing amplifier or a non inverting amplifier with DC offset (both designed for unity gain). The precision depends largely on the 0.5V offset signal, riding it of noise will give you good results. Cheers!
Hi! Try using a summing amplifier or a non inverting amplifier with DC offset (both designed for unity gain). The precision depends largely on the 0.5V offset signal, riding it of noise will give you good results. Cheers!
Mar 9, 2015 #3 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,445 Helped 14,754 Reputation 29,790 Reaction score 14,109 Trophy points 1,393 Location Bochum, Germany Activity points 298,210 What's the best way depends on your requirement details. The most simple way is a bias-T (a capacitor + a resistor) and a 0.5 V DC source.
What's the best way depends on your requirement details. The most simple way is a bias-T (a capacitor + a resistor) and a 0.5 V DC source.
Mar 9, 2015 #4 R ravindragudi Full Member level 3 Joined Jan 20, 2010 Messages 172 Helped 51 Reputation 102 Reaction score 51 Trophy points 1,308 Activity points 2,334 More details needed. Refer to the link here for one of the approach of adding dc bias. https://www.edn.com/design/analog/4335762/Circuit-level-shifts-ac-signals
More details needed. Refer to the link here for one of the approach of adding dc bias. https://www.edn.com/design/analog/4335762/Circuit-level-shifts-ac-signals