Is it necessory add a clamp in the front of RFID tag, with there is a limiter already

Status
Not open for further replies.

b12345

Newbie level 6
Joined
Sep 30, 2011
Messages
11
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Visit site
Activity points
1,381
As follows, fig1 shows in the tag, there is a limiter after dickson charge pump, to limit the supply.
Fig2, can we assume the limiter as some diodes? It means that, if the limiter do work, we can regard it as a small resistor which in parallel with the system, thus the voltage of the system is limited.
Fig3 is the circuit of dickson charge pump.
So, is it necessory to add a clamp in fig1? (All the transistor must operate below 3V.). If the clamp is needed, what's the reason and its influence?
Thanks for your reply very much


 

Status
Not open for further replies.
Cookies are required to use this site. You must accept them to continue using the site. Learn more…