Bias Circuit for Class-AB Microwave Amplifier

[snmeciut]

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]

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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