Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hi Hanzhong,
Check the load driving capability of your external circuit.
With 330ohms, you are loading your extranl circuit @ 34.24mA ((12V-0.7V)/330) ... where as with 470kohm it is only 23.04uA ..
Regards,
Naga.
The capacitor in feedback path offers infinite impedance at DC. That means you have Infinite Gain (Gain = - Zfb/Zin) at DC. In order to limit this DC gain you need a parallel resistor with capacitor.
Otherwise The DC gain will be limited only by the leakage impedance of the circuit.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
