An electronic device is provided. The electronic device includes an antenna, a wireless communication circuit, and a diplexer. The diplexer includes a first port, and second and third ports connected to the wireless communication circuit, a low pass filter (LPF) configured to filter an RF signal of a low frequency band from a signal received from one of the first port and the second port and output same to the other one of the first port and the second port, and a high pass filter (HPF) configured to filter an RF signal of a high frequency band from a signal received from one of the first port and the third port and output same to the other one of the first port and the third port.

An electronic device is provided. The electronic device includes an antenna, a wireless communication circuit, and a diplexer. The diplexer includes a first port, and second and third ports connected to the wireless communication circuit, a low pass filter (LPF) configured to filter an RF signal of a low frequency band from a signal received from one of the first port and the second port and output same to the other one of the first port and the second port, and a high pass filter (HPF) configured to filter an RF signal of a high frequency band from a signal received from one of the first port and the third port and output same to the other one of the first port and the third port.

A semiconductor chip includes a first wireless communication circuit, a local oscillator (LO) buffer, and an auxiliary path. The first wireless communication circuit has a signal path, wherein the signal path has a mixer input port and a signal node distinct from the mixer input port. The auxiliary path is used to electrically connect the LO buffer to the signal node of the signal path. The LO buffer is reused for a transmit (TX) function through the auxiliary path.

A semiconductor chip includes a first wireless communication circuit, a local oscillator (LO) buffer, and an auxiliary path. The first wireless communication circuit has a signal path, wherein the signal path has a mixer input port and a signal node distinct from the mixer input port. The auxiliary path is used to electrically connect the LO buffer to the signal node of the signal path. The LO buffer is reused for a transmit (TX) function through the auxiliary path.

An RF device may include RF circuitry having a PIN diode configured to switch an RF signal, and a biasing circuit. The biasing circuit may include a controllable power supply having a control input and an current output coupled to the PIN diode to selectively bias the PIN diode into an ON state, and a feedback circuit coupled between the current output and the control input of the controllable power supply to set a current delivered to the PIN diode in the ON state.

A transceiver includes a package substrate and a die, and a transceiver switch is disposed in the transceiver. The transceiver switch includes an antenna feedpoint, a transmit feedpoint and a receive feedpoint that are coupled to the antenna feedpoint, and a first metal connection line disposed on the package substrate, and the antenna feedpoint and the receive feedpoint are disposed at two ends of the first metal connection line. The transceiver switch further includes a first switch, a transmit pad, and a receive pad that are disposed on the die, a first terminal of the first switch is coupled to the receive pad, a second terminal of the first switch is coupled to a ground terminal of the die, the receive pad is coupled to the receive feedpoint, and the transmit pad is coupled to the transmit feedpoint.

A transceiver includes a package substrate and a die, and a transceiver switch is disposed in the transceiver. The transceiver switch includes an antenna feedpoint, a transmit feedpoint and a receive feedpoint that are coupled to the antenna feedpoint, and a first metal connection line disposed on the package substrate, and the antenna feedpoint and the receive feedpoint are disposed at two ends of the first metal connection line. The transceiver switch further includes a first switch, a transmit pad, and a receive pad that are disposed on the die, a first terminal of the first switch is coupled to the receive pad, a second terminal of the first switch is coupled to a ground terminal of the die, the receive pad is coupled to the receive feedpoint, and the transmit pad is coupled to the transmit feedpoint.

A communication system includes a digital data processor that produces a digital data sample and one or more control bits. A serialized transmit interface assembles the digital data sample and the control bit(s) into first and second data packets of a data frame, and sends the data frame over a signal line. A serialized receive interface receives the data frame and produces a reconstructed digital data sample and the control bit(s) from the first and second data packets. A control circuit coupled to the serialized receive interface produces a control signal from the control bit(s). The communication system may include a converter circuit, which produces an RF input signal by performing a digital-to-analog conversion of the reconstructed digital data sample, and by upconverting the resulting analog data sample signal to RF. A power amplifier amplifies the RF input signal and modifies operation of a sub-circuit based on the control signal.

A communication system includes a digital data processor that produces a digital data sample and one or more control bits. A serialized transmit interface assembles the digital data sample and the control bit(s) into first and second data packets of a data frame, and sends the data frame over a signal line. A serialized receive interface receives the data frame and produces a reconstructed digital data sample and the control bit(s) from the first and second data packets. A control circuit coupled to the serialized receive interface produces a control signal from the control bit(s). The communication system may include a converter circuit, which produces an RF input signal by performing a digital-to-analog conversion of the reconstructed digital data sample, and by upconverting the resulting analog data sample signal to RF. A power amplifier amplifies the RF input signal and modifies operation of a sub-circuit based on the control signal.

The present disclosure relates to an electronic device comprising a first capacitor and a quartz crystal coupled in series between a first node and a second node; an inverter coupled between the first and second nodes; a first variable capacitor coupled between the first node and a third node; and a second variable capacitor coupled between the second node and the third node.