Abstract: An amplification device includes an amplification unit, an impedance unit and a log power detector. The amplification unit includes an input terminal for receiving a radio-frequency signal, an output terminal for outputting an amplified radio-frequency signal, and a detected terminal for outputting a detected signal related to the radio-frequency signal. The impedance unit is used to provide an impedance. The impedance unit includes an input terminal coupled to the detected terminal of the amplification unit for receiving the detected signal, and an output terminal for outputting a power signal. The log power detector is used to generate a power indication signal according to the power signal. The log power detector includes an input terminal coupled to the output terminal of the impedance unit, and an output terminal for outputting the power indication signal.

Abstract: An amplification device includes an amplification unit, an impedance unit and a log power detector. The amplification unit includes an input terminal for receiving a radio-frequency signal, an output terminal for outputting an amplified radio-frequency signal, and a detected terminal for outputting a detected signal related to the radio-frequency signal. The impedance unit is used to provide an impedance. The impedance unit includes an input terminal coupled to the detected terminal of the amplification unit for receiving the detected signal, and an output terminal for outputting a power signal. The log power detector is used to generate a power indication signal according to the power signal. The log power detector includes an input terminal coupled to the output terminal of the impedance unit, and an output terminal for outputting the power indication signal.

Abstract: The reference voltage generator includes an output terminal, first to fourth resistors, first to fourth transistors, and a diode unit. The first transistor is coupled to the second transistor. The first resistor is coupled between the second transistor and a second reference voltage terminal. The first resistor is also coupled to the first transistor. One terminal of the diode unit is coupled to the output terminal, and the other terminal of the diode unit is coupled to the second and third resistors. The second and third resistors are also coupled to the first and second transistors, respectively. The third transistor is coupled between the fourth resistor and the second reference voltage terminal, and includes a control terminal coupled to the second transistor. The fourth transistor is coupled between a first reference voltage terminal and the diode unit. The fourth transistor is also coupled to the fourth resistor.

Abstract: The reference voltage generator includes an output terminal, first to fourth resistors, first to fourth transistors, and a diode unit. The first transistor is coupled to the second transistor. The first resistor is coupled between the second transistor and a second reference voltage terminal. The first resistor is also coupled to the first transistor. One terminal of the diode unit is coupled to the output terminal, and the other terminal of the diode unit is coupled to the second and third resistors. The second and third resistors are also coupled to the first and second transistors, respectively. The third transistor is coupled between the fourth resistor and the second reference voltage terminal, and includes a control terminal coupled to the second transistor. The fourth transistor is coupled between a first reference voltage terminal and the diode unit. The fourth transistor is also coupled to the fourth resistor.

Abstract: A power detection circuit includes an input end for receiving an AC input signal, a rectifier for converting the AC input signal into a rectified signal, an output end for outputting the rectified signal, at least two voltage clamp circuits, each for providing an electrical path between the output end and a reference voltage end when the rectified signal is greater than a threshold voltage of the voltage clamp circuit. A threshold voltage of at least one of the voltage clamp circuit is different from a threshold voltage of another clamp circuit.

Abstract: A power detection circuit includes an input end for receiving an AC input signal, a rectifier for converting the AC input signal into a rectified signal, an output end for outputting the rectified signal, at least two voltage clamp circuits, each for providing an electrical path between the output end and a reference voltage end when the rectified signal is greater than a threshold voltage of the voltage clamp circuit. A threshold voltage of at least one of the voltage clamp circuit is different from a threshold voltage of another clamp circuit.

Abstract: A matching circuit system includes a first inductor, a first capacitor, a second inductor, a second capacitor, a third inductor, and a third capacitor. The first inductor has a first terminal and a second terminal. The first capacitor has a first terminal coupled to the first terminal of the first inductor, and a second terminal. The second inductor has a first terminal coupled to the second terminal of the first capacitor, and a second terminal coupled to ground. The second capacitor has a first terminal coupled to the first terminal of the first capacitor, and a second terminal. The third capacitor has a first terminal coupled to the second terminal of the second capacitor, and a second terminal. The third inductor has a first terminal coupled to the first terminal of the second capacitor, and a second terminal coupled to the second terminal of the second capacitor.

Abstract: An integrated passive device with electrostatic discharge protection mechanism includes an antenna terminal for receiving and transmitting a wireless signals, a first frequency terminal for receiving and transmitting a signal with a first frequency, a first filtering circuit for filtering the wireless signal, and an electrostatic discharge protection element for conducting static electricity to ground. The first filtering circuit includes a first filtering element with a first end electrically connected to the antenna terminal, a second filtering element with a first end electrically connected to a second end of the first filtering element and a second end electrically connected to the first frequency terminal, and a third filtering element with a first end electrically connected to the second end of the first filtering element and a second end electrically connected to ground. The electrostatic discharge protection element is coupled between the second end of the first filtering element and ground.

Abstract: A power amplifier integrated circuit, which generates an RF output signal by amplifying an RF input signal, includes a thermal-sensing circuit, a feedback circuit, a logic judging circuit, an adjusting circuit, and an amplifying circuit. The thermal-sensing circuit generates a thermal sensing signal according to the operational temperature, and the feedback circuit generates a power compensation circuit according to power variations in the RF output signal. The logic judging circuit outputs a compensation signal according to the thermal sensing signal and the power compensation signal. The adjusting circuit adjusts the level of the RF input signal according to the compensation signal, thereby generating a corresponding 1st stage RF signal. The amplifying circuit can amplify the 1st stage RF signal, thereby generating the corresponding RF output signal.

Abstract: A power amplifier integrated circuit, which generates an RF output signal by amplifying an RF input signal, includes a thermal-sensing circuit, a feedback circuit, a logic judging circuit, an adjusting circuit, and an amplifying circuit. The thermal-sensing circuit generates a thermal sensing signal according to the operational temperature, and the feedback circuit generates a power compensation circuit according to power variations in the RF output signal. The logic judging circuit outputs a compensation signal according to the thermal sensing signal and the power compensation signal. The adjusting circuit adjusts the level of the RF input signal according to the compensation signal, thereby generating a corresponding 1st stage RF signal. The amplifying circuit can amplify the 1st stage RF signal, thereby generating the corresponding RF output signal.