electronrancher
Advanced Member level 1
i am trying to balance the tricky goals of power output stage (>5mA) and wide bandwidth (>30-40MHz). oh i need rail to rail as well.
class-AB is best for rail-to-rail but needs a lot of class-A dissipation in order to move the output devices so fast. has anyone successfully built a wide-bandwidth output stage able to sink/source a few mA?
sorry i do not want papers, but if you have used one, i'd like to hear about it.
example is: I built a hogervorst class-AB in 1/2 um. power is good but gain peaking at high frequency kills the phase margin. all in all i would call it junk above 10MHZ unless you want to burn 1mA Iq.
class-AB is best for rail-to-rail but needs a lot of class-A dissipation in order to move the output devices so fast. has anyone successfully built a wide-bandwidth output stage able to sink/source a few mA?
sorry i do not want papers, but if you have used one, i'd like to hear about it.
example is: I built a hogervorst class-AB in 1/2 um. power is good but gain peaking at high frequency kills the phase margin. all in all i would call it junk above 10MHZ unless you want to burn 1mA Iq.
