Wilson_yu_chen
Advanced Member level 4
Hi Professionals,
Any body know the performance risk for power input lower or equal to lowest Pin in GSM PA datasheet ??
I thought power contour may change, like Pout saturation would be lower, and effeciency lower at max PCL.
Any others? like linearity performance - harmonics larger and little higher noise level.
Ususally 3 stages PA has first stage working in linear region, and last two for power gain stages. For lower input power to first stage, because of fixed gain,
2nd and 3rd stage would be driven more harder to maintain same Pout. That's why
I thought some performances will get degradation.
Any one can give me recommendation or correction ??
Thanks
Any body know the performance risk for power input lower or equal to lowest Pin in GSM PA datasheet ??
I thought power contour may change, like Pout saturation would be lower, and effeciency lower at max PCL.
Any others? like linearity performance - harmonics larger and little higher noise level.
Ususally 3 stages PA has first stage working in linear region, and last two for power gain stages. For lower input power to first stage, because of fixed gain,
2nd and 3rd stage would be driven more harder to maintain same Pout. That's why
I thought some performances will get degradation.
Any one can give me recommendation or correction ??
Thanks