F
Francesco
- Jan 1, 1970
- 0
Hi, I have a problem with this circuit, I don't understand why the input
resistance is Vi/Ir, why should omit the current through the base of
transistor? I think the input resistance should be Vi/(Ir+Ib). on DC
level, the current through the voltage divider is much larger than the
base current, but on AC level, since now we have a bootstrap in the
circuit , the bootstrap resistor becomes(or at least looks like) larger
and i think it is incorrect to neglect the base current.
of course, as you could see, there must be some incorrectness in my
mind, plz do help me overcome it. Thanks.
resistance is Vi/Ir, why should omit the current through the base of
transistor? I think the input resistance should be Vi/(Ir+Ib). on DC
level, the current through the voltage divider is much larger than the
base current, but on AC level, since now we have a bootstrap in the
circuit , the bootstrap resistor becomes(or at least looks like) larger
and i think it is incorrect to neglect the base current.
of course, as you could see, there must be some incorrectness in my
mind, plz do help me overcome it. Thanks.