Hi Nigel,
Thanks for the reply. Let me try to explain. I was starting to learn about diode clippers, and in reference books it is given that clampers are used to shift the DC level of signals. The design of clamper is also given, which i have uploaded here under the title "diode clamper". The circuit shifts the DC value of signal at approximately Vp - peak value of signal. Now what I dont understand this is why do we use diodes and capacitor. If we want to raise the DC value, then why cant we add a battery of desired voltage in series with the source, as shown in the uploaded file under the title "using a battery to shift DC level". I guess that would be easier as we can achieve the goal with just one component(battery) rather than using diodes and capacitors. What do you say Nigel?