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. Author manuscript; available in PMC: 2016 Apr 27.
Published in final edited form as: Magn Reson Med. 2012 Aug 13;70(1):276–289. doi: 10.1002/mrm.24462

Table 1.

Power and efficiency estimation by driving the CMCD stage with PWM DC-DC converter for different amplitude of SDM encoded RF envelope.

Duty Cycle (%) VIN (V) VDD (V) IDD (A) PDD (W) VRMS (V) (Z2 = 50 Ω) PRMS (W) IRMS (A) (Z1 ~ 7 Ω) η_CMCD (%)
20.37±0.12 60.29±0.07 8.62±0.10 2.87±0.31 24.77±2.94 32.76±0.41 21.47±0.54 1.8±0.02 87.39±9.17
27.6±0.89 59.29±0.01 12.1±0.02 4.86±0.1 58.83±1.25 46.79±0.41 43.78±0.76 2.58±0.02 74.46±2.78
39.07±0.6 58.07±0.13 16.6±0.16 6.1±0.13 101.32±2.95 63.05±0.54 79.51±1.36 3.47±0.03 78.53±3.37
50.43±0.75 57.00±0.18 20.76±0.21 7.67±0.3 159.3±7.9 78.96±1.24 124.72±3.93 4.35±0.10 78.42±4.66
79.9±1.06 53.22±0.34 27.53±0.35 9.31±0.62 256.44±20.2 102.77±0.54 211.22±2.22 5.66±0.03 82.74±7.03