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Bias Circuit for Class-AB Microwave Amplifier

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snmeciut

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Dear

I want to control of Bias of LDMOS power amplifier in L band over temperature variation and change the voltage of gate due to drain current variation with drain current fault.

I found DS1870 integrated circuit for solving of this problem.

have you any discrete circuit suggestion for solving of this problem.
 

xtasa

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Hello Snmeciut,

Please check Polyfet site you will find circuit with diodes which working well . I test it with a lot RF LDMOS transistors and if you calculate elements correct it works really fine with temperature.

GL XTASA
 

vfone

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**broken link removed**
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