Abstract: Various aspects provide a transceiver and a communication device including the transceiver. In an example, the transceiver includes an amplifier circuit including an amplifier stage with an adjustable degeneration component, the amplifier stage configured to amplify a received input signal with an adjustable gain, an adjustable feedback component coupled to the amplifier stage; and a controller coupled to the amplifier stage and to the adjustable feedback component and configured to adjust the adjustable feedback component based on an adjustment of the adjustable degeneration component.

Abstract: Various aspects provide a transceiver and a communication device including the transceiver. In an example, the transceiver includes an amplifier circuit including an amplifier stage with an adjustable degeneration component, the amplifier stage configured to amplify a received input signal with an adjustable gain, an adjustable feedback component coupled to the amplifier stage; and a controller coupled to the amplifier stage and to the adjustable feedback component and configured to adjust the adjustable feedback component based on an adjustment of the adjustable degeneration component.

Abstract: Disclosed herein is a radio frequency (RF) circuit for a transmit/receive switch that includes an antenna coupled to a receive path through a first coupled transmission line. The antenna is also coupled to a transmit path through a second coupled transmission line. The RF circuit includes a receiver switch configured to selectively present to the receive path a high impedance or a low impedance to ground and a transmitter switch configured to selectively present to the transmit path a high impedance or a low impedance to ground. The receiver switch and/or transmitter switch may be independently supplied with a bias voltage that depends on whether the circuit is operating in a transmit mode or receive mode. The RF circuit may have improved insertion loss, bandwidth, and linearity, while also providing robustness to electrostatic discharge (ESD).

Abstract: Impedance matching circuits, impedance matching elements, and radio communication circuits are provided in this disclosure. The impedance matching circuit may include a first impedance matching element which is configured to radio communication circuit may include a modulator configured to receive an unbalanced input signal from a first input, and couple the unbalanced input signal to a first output to match an impedance of the first output to a first impedance. It may further include a second impedance matching element coupled to the first input to receive the unbalanced input signal, the second impedance matching element configured to couple the unbalanced input signal to a second output to match an impedance of the second output to a second impedance. A terminal of the first output and a terminal of the second output may be coupled to provide a balanced output signal, and the coupling may match an output impedance of the impedance matching circuit based on the first impedance and the second impedance.

Abstract: Radio communication circuits, radio transmitters, and methods are provided in this disclosure. The radio communication circuit may include a modulator configured to provide a first modulated signal including a carrier signal at a carrier frequency, and a second modulated signal including the carrier signal at the carrier frequency. The radio communication circuit may further include a phase shift generator configured to receive a first signal based on the first modulated signal and a second signal based on the second modulated signal. The phase shift generator of the radio communication circuit may further be configured to provide a predefined phase difference between the first signal and the second signal.

Abstract: Various aspects provide a transceiver and a communication device including the transceiver. In an example, the transceiver includes an amplifier circuit including an amplifier stage with an adjustable degeneration component, the amplifier stage configured to amplify a received input signal with an adjustable gain, an adjustable feedback component coupled to the amplifier stage; and a controller coupled to the amplifier stage and to the adjustable feedback component and configured to adjust the adjustable feedback component based on an adjustment of the adjustable degeneration component.