Hey,

Monostable Multivibrators (One-Shot)

1.
look at the "Monostable Multivibrator Circuit" at the link above. As I understand there is a mistake in the explanation "The Collector of TR1 which was previously at Vcc drops quickly to below zero volts effectively giving capacitor C2 a reverse charge of -0.6v across its plates. This results in transistor TR2 now having a Base voltage of -0.6v holding the transistor fully "OFF" at point VbTR2".
I clame that voltage on C2 is -(Vcc-0.6) and not -0.6 as was written, am I right?


2. I can not understand if there is a current into the base of TR2 while voltage on C2 is less than 0.6V. if the answer is YES explain why? if the answer is NO explain why too.


Thanks ahead

Originally Posted by Zener_Diode

look at the "Monostable Multivibrator Circuit" at the link above. As I understand there is a mistake in the explanation "The Collector of TR1 which was previously at Vcc drops quickly to below zero volts effectively giving capacitor C2 a reverse charge of -0.6v across its plates. This results in transistor TR2 now having a Base voltage of -0.6v holding the transistor fully "OFF" at point VbTR2".
I clame that voltage on C2 is -(Vcc-0.6) and not -0.6 as was written, am I right?

The explanation is bs. The voltage at the collector of TR1 will go from vcc to ~0V. The voltage of TR2 base will go from +0.6 to ~-(Vcc-0.6).