Hi all. some help would really be appreciates with this problem I am having!
I have designed a common emitter amplifier using a BJT. Running at 10MHz. I am taking a sine wave from a signal generator as the input (can be up to 10v pk-pk, but currently am taking 2v pk-pk as small input means i dont have such a large voltage at the emitter. i have an emitter bias resistor and emitter degeneration to limit the gain (I need 40v pk-pk output).
However, I need more current than this can supply so I wanted to connect a common collector to the output. This reduces the output of the CE by about 10V though. Does anyone know what I am doing wrong or what I can do to fix this?
Also, am I best to use a cascode amplifier? If so, I have no idea where to start so any guidance would be great!! Are there any pros/cons of the two approaches?
I literally just need the 40v sine wave, but have smaller signal generators available. I am using BJTs because I struggled to find high frequency, high voltage op amps.
Any feedback? Thanks a lot in advance!
I have designed a common emitter amplifier using a BJT. Running at 10MHz. I am taking a sine wave from a signal generator as the input (can be up to 10v pk-pk, but currently am taking 2v pk-pk as small input means i dont have such a large voltage at the emitter. i have an emitter bias resistor and emitter degeneration to limit the gain (I need 40v pk-pk output).
However, I need more current than this can supply so I wanted to connect a common collector to the output. This reduces the output of the CE by about 10V though. Does anyone know what I am doing wrong or what I can do to fix this?
Also, am I best to use a cascode amplifier? If so, I have no idea where to start so any guidance would be great!! Are there any pros/cons of the two approaches?
I literally just need the 40v sine wave, but have smaller signal generators available. I am using BJTs because I struggled to find high frequency, high voltage op amps.
Any feedback? Thanks a lot in advance!