Abstract: A transceiver includes a receive path including a low noise amplifier and a first switch coupled between the low noise amplifier and ground, a first transmit path including a low power amplifier and a second switch coupled between the low power amplifier and a main signal path, and a second transmit path including a high power amplifier and a third switch coupled between the main signal path and ground. The receive path is active when the first, second, and third switches are in an open position, the first transmit path is active when the first switch is in a closed position, the second switch is in the closed position, and the third switch is in the open position, and the second transmit path is active when the first switch and the third switch are in the closed position, and the second switch is in the open position.

Abstract: A transceiver includes a receive path including a low noise amplifier and a first switch coupled between the low noise amplifier and ground, a first transmit path including a low power amplifier and a second switch coupled between the low power amplifier and a main signal path, and a second transmit path including a high power amplifier and a third switch coupled between the main signal path and ground. The receive path is active when the first, second, and third switches are in an open position, the first transmit path is active when the first switch is in a closed position, the second switch is in the closed position, and the third switch is in the open position, and the second transmit path is active when the first switch and the third switch are in the closed position, and the second switch is in the open position.

Abstract: A radio for a half-duplex communication system includes a warning circuit for indicating when a transmission of a signal is taking place. The radio includes a transceiver for providing a voice signal, and the warning circuit includes a pulse generator for providing a beacon signal. The voice signal and the beacon signal are combined into a transmitted signal. The warning circuit includes a power splitter for receiving a remote signal from an antenna and for dividing the remote signal into the voice and beacon signals thereof. The power splitter then provides the voice signal to the transceiver. A comparator compares a level of the received beacon signal with a reference and provides an output to an indicator (such as an LED) when the level of the beacon signal is greater than the reference. As such, the indicator illuminates in the presence of a beacon signal.