Patent ID: 9225176
Filing Date: 2015-12-29
Classification: H02J

Abstract:
1. A high efficiency variable power transmitting apparatus comprising: a variable power generating unit configured to output a variable power by modulating, with respect to a time axis, a high frequency signal having a constant amplitude by turning the high frequency signal ON and OFF, wherein the variable power generating unit comprises a modulated signal generating unit configured to generate a low frequency modulated signal having a duty cycle depending on the requested power level of the target device; a power amplifier (PA) configured to amplify the variable power to satisfy a requested power level of a target device based on a power supply voltage having a predetermined level; and a power supply configured to convert an alternating current (AC) voltage received from a power source to a direct current (DC) voltage, generate the power supply voltage having the predetermined level based on the DC voltage, and provide the power supply voltage having the predetermined level to the PA.