Ideal Current Mode Class D (CMCD) question

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Hi all,

I am designing this CMCD-PA using Agilent ADS. I would like to know, why did the voltage at output load (R4) form a half sinusoidal shape?
Shouldn't it be a full sinusoidal waveform, similar to the current at R4??:confused:

You can refer to my schematic and the output in the attachment below.

TQ
 

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  • Schematic ideal CMCD.JPG
    Schematic ideal CMCD.JPG
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  • Output Current and Voltage at Load.JPG
    Output Current and Voltage at Load.JPG
    57.9 KB · Views: 87
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