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Last post Mon, Dec 2 2013 1:58 PM by serkan densiz. 3 replies.
 Started by MicroShab 03 Jun 2013 11:21 AM. Topic has 3 replies and 700 views
• #### Mon, Jun 3 2013 11:21 AM

• MicroShab
• Joined on Fri, May 10 2013
• Posts 5
• Points 55
 Hi, I am designing a rectifier and need to calculate the efficiency.I have followed the below procedure:1. Designed a rectifier using MOSes with RF signal at 865MHz with a load current of 4uA.2. Simulated the rectifier using transient analysis. I tried to vary the design variable 'v' (Input Voltage amplitude) to monitor the dc voltage.3. In order to calculate the efficiency, I need to know the ac power and dc power.  When I gave input voltage of 450mV (amplitude), I observed the plot of 412mV as dc output. So, my dc power is 4uA * 412mV.4. Coming to ac power, I did ac analysis by sweeping the design variable 'v' at frequency of 865MHz. Then, in the calculator using Vf and If, I selected the net and node of the voltage source.Then, I selected the "average" function. Am I correct? Will the average of the (V*I) gives the ac power? By doing so, I didn't observe desired plots. Can you please let me know how to calculate the ac power? Is there any other procedure to do the same? If I have done any mistake in the above procedure,please correct me.     1.jpg
• Post Points: 5
• #### Tue, Jun 4 2013 3:31 AM

• MicroShab
• Joined on Fri, May 10 2013
• Posts 5
• Points 55
 What should I consider (either rms or average value) of voltage and current while calculating ac and dc power?When I tried to calculate average dc current, its neither plotting the graph nor showing the value. It says expression is invalid.Can you please explain how to do so? I am in desperate need of help. Pls folks, post ur suggestions.
• Post Points: 20