Patent ID: 7974648
Filing Date: 2011-07-05
Classification: H04B

Abstract:
1. A radio communication system performing radio communication in an ultra wide band radio transmission method, the radio communication system comprising: a transmitter applying current from a power supply node to a ground node through a first coil only at a rise of an input signal including a pulse signal thereby inducing an induced current having a pulse waveform with a pulse width shorter than a pulse width of the pulse signal in a second coil different from the first coil, applying the induced current to an antenna, and transmitting a transmission signal having the pulse waveform by radio communication; and a receiver detecting a change in potential of a potential detection node by applying current from the potential detection node to a ground node only at reception of the transmission signal transmitted from the transmitter and receiving the transmission signal, wherein the transmitter includes the first MOS transistor is turned on in accordance with a rise of the input signal and applies current from the power supply node to the ground node through the first coil, the second MOS transistor is in an on-state until a certain time elapses after the first MOS transistor has been turned on, and the delay circuit turns off the second MOS transistor after the certain time has elapsed from the turn on of the first MOS transistor, the receiver includes the receiving circuit includes