Patent ID: 9473110
Filing Date: 2016-10-18
CPC Classification: H02J,H03J

Claim Text:
1. An antenna control circuit comprising: an H-bridge circuit including three half-bridge circuits; and a controller configured to control the H-bridge circuit; wherein a first half-bridge circuit and a second half-bridge circuit of the three half-bridge circuits are configured to electrically connect across a resonant antenna with a first resonant frequency and a second resonant frequency; wherein a third half-bridge circuit is configured to electrically connect to a first capacitance connected to the resonant antenna, wherein the controller is configured to control the third half-bridge circuit to switch the connection of the first capacitance to the resonant antenna to a first position that changes the resonant frequency of the resonant antenna to the first resonant frequency; wherein the resonant antenna comprises a second capacitance and an inductor coil, wherein the second capacitance is in parallel with the inductor coil.