Technical issues related to RF transistor SD2933

[H_YM]

We want to use this transistor to drive piezoelectric ceramics at 900KHz, 1.7MHz, and 3MHz, which requires about 50W of power.

I have the following questions and need help:

1. Can this transistor be used at a frequency of 900kHz? Can it only be used in frequency bands above 1MHz?

2. The data sheet provides a test circuit under 30MHz conditions. We do not fully understand the functions and principles of the FB2 and T2 components. Can you explain it to us? We guess that the function of this component should be for impedance conversion. Can the FB2 and T2 components be replaced with a simple and easy-to-understand transformer impedance conversion form (FT-43 core) like the previous stage?

3. We want to imitate the 30MHz test circuit and apply it directly to the production environment. Are there any other issues worth noting during this process?

[mƎALLEm]

Hello and welcome to this community.

Please kindly write in English to let other members help you efficiently.

Thank you.

 

Translation:

Subject: Technical issues related to RF transistor SD2933:We want to use this transistor to drive piezoelectric ceramics at 900KHz, 1.7MHz, and 3MHz, which requires about 50W of power.

I have the following questions and need help:

1. Can this transistor be used at a frequency of 900kHz? Can it only be used in frequency bands above 1MHz?

2. The data sheet provides a test circuit under 30MHz conditions. We do not fully understand the functions and principles of the FB2 and T2 components. Can you explain it to us? We guess that the function of this component should be for impedance conversion. Can the FB2 and T2 components be replaced with a simple and easy-to-understand transformer impedance conversion form (FT-43 core) like the previous stage?

3. We want to imitate the 30MHz test circuit and apply it directly to the production environment. Are there any other issues worth noting during this process?