TRANSMITTER/RECEIVER APPARATUS, TRANSMITTER APPARATUS AND TRANSMITTING/RECEIVING METHOD

摘要

A transmitter/receiver apparatus including: a transmitter/receiver terminal; a switching amplifier that includes a low-side switching element connected between a ground terminal and a pulse output terminal and a high-side switching element connected between the pulse output terminal and a power supply terminal and that outputs a pulse signal from the pulse output terminal; a filter that passes therethrough and outputs as a transmitted signal a predetermined frequency component of the pulse signal from a transmitter terminal; and a transmit/receive switch unit that switches the connection status between the transmitter/receiver terminal and the transmitter terminal and also switches the connection status between the transmitter/receiver terminal and a receiver terminal. During receiving, on the basis of the connection status between the transmitter/receiver terminal and the transmitter terminal, the low-side and high-side switching elements are fixed to conductive and non-conductive states, respectively, to non-conductive and conductive states, respectively, or both to non-conductive states.

主权项

1. A transmitter/receiver apparatus,
comprising:
a transmitter/receiver terminal that is shared between transmitting of a transmitted signal and receiving of a received signal;a switching amplifier that includes a low-side switching element connected between a ground terminal and a pulse output terminal, a high-side switching element connected between the pulse output terminal and an electric power supply terminal, and a filter for passing a predetermined frequency component of a pulse signal and outputting the pulse signal filtered from a transmitter terminal as the transmitted signal, and that outputs the pulse signal from the pulse output terminal; anda transmit/receive switch unit that switches a connection status between the transmitter/receiver terminal and the transmitter terminal and switches a connection status between the transmitter/receiver terminal and a receiver terminal for receiving input of the received signal; andduring the receiving, based on the connection status between the transmitter/receiver terminal and the transmitter terminal, the low-side switching element and the high-side switching element are respectively fixed to a conductive state and a non-conductive state, to the non-conductive state and the conductive state, or to the non-conductive state and the non-conductive state.