SEMICONDUCTOR DEVICE, AND TRANSMISSION AND RECEPTION CIRCUIT

摘要

According to an embodiment, a semiconductor device includes an antenna switch, a harmonic wave suppression circuit, and an impedance matching circuit. The antenna switch includes a first node, a second node to which a transmission signal in a communication band is supplied, and a third node. The harmonic wave suppression circuit is connected to the first node, and changes a frequency characteristic in response to a control signal such that a frequency component in the communication band is allowed to pass through the harmonic wave suppression circuit and a harmonic wave component of the transmission signal is suppressed. The impedance matching circuit is connected between the harmonic wave suppression circuit and an antenna, and matches an impedance of the harmonic wave suppression circuit with an impedance of the antenna in the communication band in response to the control signal.

主权项

1. A semiconductor device comprising:
an antenna switch including a first node, a second node to which a transmission signal in a communication band is supplied, and a third node from which a reception signal is output; a harmonic wave suppression circuit connected to the first node, and having a frequency characteristic that is alterable in response to a control signal such that a frequency component in the communication band is allowed to pass through the harmonic wave suppression circuit and a harmonic wave component of the transmission signal is suppressed; and an impedance matching circuit connected between the harmonic wave suppression circuit and an antenna, and configured to match an impedance of the harmonic wave suppression circuit with an impedance of the antenna in the communication band in response to the control signal.