37. Class C Amplifiers 

Thank you for a great explanation from algeria north africa.

Thanks for the extra math, i was having trouble figuring out the collector current

Thanks for clearing this up in a simple easy to understand way.

Great video thanks for sharing!

@ 5:10 , how do we go from negative to positive while the cap is discharging? Isn't Vb or the upper resistor pin connected the base o transistor supposed to be at higher potential than the GND so + to - meaning a positive 0.3 Volts bias? What am I not getting in here?

I have no idea how you got the values for the clamper circuit. A bit more calculation with the 5Mhz and the values of capacitor and resistor would've been nice. I can't recreate that. For me it's not 10 times the input. Please help.

Thanks a lot.

I have trouble when trying to simulate this circuit in LTSpice it just doesn't seem to give me a nice sine wave output. Hmm I changed my timestep in LTSpice to 1nanosecond and now I get a sine wave, but it looks like every so often the sine wave ends up "building up" to some larger value before settling down again. But it looks a lot better. Gotta learn to use the tools better.

Nice explanation! One quick question: how did you choose the value 1k for your efficiency calculation?

Amazing explanation! From 7X3TL

Keeping the pulse width of the input signal seems to benefit efficiency, but what about the signal strength from the inductor?

Could not be more clear, amazing, thanks a lot

It helped alot

At 26:33, shouldn't it be microwatts instead of nanowatts?

thanks !

Again, thank you!!!

246 nano watt or 246 micro watt?

So would this amplifier work for an fm circuit? I'm confused how this would double the frequency of an fm wave since there would also be frequency deviation.

Thx teacher

I have a transmitter that has a input audio source of peak frequency 20Khz( as usual) and I fed that into a class C which is at 97MHz resonant frequency...and still that works fine...

Thanks 👽👍

What transistor are you using?

what is the point of this amplifier? why not just make an oscillator?

its 240 mW not nW, dont forget to plug in the correct units

there is an error in your calculation!!!