Sir assuming the microphone outputs plus minus 100mv around zero, the diode will ” never “ conduct as the 5.7v at the base bias point will keep it reverse biased.
The microphone was giving us +/- 10mV from memory. A diode, even a germanium one is blocking this very low signal - about the first 300mV from memory. Or am I missing something, as it wasn't mentioned at all?
This intrigues me too. The Class A amp was so brilliantly described, I'm imagining a very educational session on Classes B and AB. I think I know how AB works, but really want that pure theory again.
This quiestion pops up all the time, the reason is because every where, in every book, they give this stupid explanation that cap blocks DC and passes AC, jeeez, just show how is charges up and discharges when mic is creating PD +100mV above ground and -100mV below ground, show how the current flows and what happens at the bias point, this is so simple.
Thanks a lot.
Sir assuming the microphone outputs plus minus 100mv around zero, the diode will ” never “ conduct as the 5.7v at the base bias point will keep it reverse biased.
The microphone was giving us +/- 10mV from memory. A diode, even a germanium one is blocking this very low signal - about the first 300mV from memory.
Or am I missing something, as it wasn't mentioned at all?
Sir could you explain how a n AB and C work and thé latter works with one fréquence only. Thanks
This intrigues me too. The Class A amp was so brilliantly described, I'm imagining a very educational session on Classes B and AB. I think I know how AB works, but really want that pure theory again.
also there will always be a 0.7v drop across that diode.
you have a bias for mic/audio applications
The reason using capacitor because it blocks Dc and passes Ac droid have resistance which drop your voltage
This quiestion pops up all the time, the reason is because every where, in every book, they give this stupid explanation that cap blocks DC and passes AC, jeeez, just show how is charges up and discharges when mic is creating PD +100mV above ground and -100mV below ground, show how the current flows and what happens at the bias point, this is so simple.