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RF Transistors Forum Discussions

SHAOYANG
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Level 1
First reply posted First question asked Welcome!
 
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1 Solution
GeorgeT
Moderator
Moderator
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50 solutions authored 25 likes received 5 likes given

Hi @SHAOYANG,

Please refer to the application notes which explains circuit designs closer to your required frequency as a starting point.

AN_1808_PL32_1809_133505

AN_1808_PL32_1808_165626

AN_1809_PL32_1811_161136

I would suggest to go with a RF transistor with ft more than 1GHz and the least noise figure that satisfy the design requirement.

Thanks and regards,

George

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5 Replies
GeorgeT
Moderator
Moderator
Moderator
50 solutions authored 25 likes received 5 likes given

Hi @SHAOYANG,

Please go through the RF Transistor product page to understand the RF transistors available from Infineon.

Also refer the application notes to find the design guides, which may suit your requirement.

Thanks and regards,

George

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  • My signal is about 400M, I should choose the small ft or the small nf

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GeorgeT
Moderator
Moderator
Moderator
50 solutions authored 25 likes received 5 likes given

Hi @SHAOYANG,

Please refer to the application notes which explains circuit designs closer to your required frequency as a starting point.

AN_1808_PL32_1809_133505

AN_1808_PL32_1808_165626

AN_1809_PL32_1811_161136

I would suggest to go with a RF transistor with ft more than 1GHz and the least noise figure that satisfy the design requirement.

Thanks and regards,

George

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tanvikhan
Level 1
Level 1
First reply posted Welcome!

In transistor common emitter mode as an amplifier is preferred over common base mode.

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Thank you for your reply.  I want the amplifier to have a very small input resistance. It is used for SIPM. 

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