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# PSS analysis Vs Transient Simulation

Last post Fri, Apr 6 2012 1:15 PM by saurabh3488. 3 replies.
 Started by saurabh3488 27 Mar 2012 04:48 AM. Topic has 3 replies and 3396 views
• #### Tue, Mar 27 2012 4:48 AM

PSS analysis Vs Transient Simulation
 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..
• Post Points: 20
• #### Thu, Mar 29 2012 10:48 AM

Re: PSS analysis Vs Transient Simulation
 Not really enough information to go on.How are you plotting the power in each case? What exactly is your analysis setup? A few pictures would help. Andrew.
• Post Points: 20
• #### Thu, Apr 5 2012 3:05 AM

Re: PSS analysis Vs Transient Simulation
 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 ishow to choose the value of coupling Capacitor Cdc as show in fig .and also Cc and Rbias  Thank you.
• Post Points: 5
• #### Fri, Apr 6 2012 1:15 PM

class B push pull power amplifier design
 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 ishow to choose the value of coupling Capacitor Cdc as show in fig .and also Cc and RbiasThank you.
• Post Points: 5