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PSS analysis Vs Transient Simulation

saurabh3488

hiiiiii

 I have designed a Push pull power amplifer to deliverd a 500uwatt power to 50 ohm antenna.

the problem what i ma facing is that- when i am doing transient simulation and plotting the power at 50 ohm load i am getting 500uwatt power but when i am doing PSS analysis and plotting the output power it is showing 250uWatt. why this is so..

and what analysis should i do for efficiency and power added efficiency calculation.

 

Thankyou.. 

Parents

  • hiiiiiii 

     

    I have to design a CLASS B push pull power amplifer. for the operating frequncy = 402 MHz, it should able to transfer 500uwatt power to 50 antenna.  i am using Vdd =1.8V

     using calculation i got RL=810 ohm.

    i.e RL = Vdd ^2 /8*Pout = 810 Ohm. so i need a matching networt that can see 810 ohm from 50 ohm antenna. i am using Tapped Capacitor resonator, the values i got L = 2.393nH , C1 87.139pF , C2 = 263.59pF.

    The design is atteched in figure. the think i need to know is

    how to choose the value of coupling Capacitor Cdc as show in fig .

    and also Cc and Rbias

    class B push pill 

     Thank you. 

Reply

  • hiiiiiii 

     

    I have to design a CLASS B push pull power amplifer. for the operating frequncy = 402 MHz, it should able to transfer 500uwatt power to 50 antenna.  i am using Vdd =1.8V

     using calculation i got RL=810 ohm.

    i.e RL = Vdd ^2 /8*Pout = 810 Ohm. so i need a matching networt that can see 810 ohm from 50 ohm antenna. i am using Tapped Capacitor resonator, the values i got L = 2.393nH , C1 87.139pF , C2 = 263.59pF.

    The design is atteched in figure. the think i need to know is

    how to choose the value of coupling Capacitor Cdc as show in fig .

    and also Cc and Rbias

    class B push pill 

     Thank you. 

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