A Voltage Multiplier With Adaptive Threshold Voltage Compensation

A voltage multiplier (VM) with adaptive threshold voltage compensation is presented to enhance the power conversion efficiency (PCE). It is fabricated in a 0.18-mu m CMOS process. With the input frequency of 402 MHz and a load resistor of 30 k Omega, this VM achieves the PCE of 31.9% with the input power of -1 dBm, and the PCE is maintained above 20% with 10-dB input range from -11 to -1 dBm.