Abstract: A power control apparatus comprises a voltage conversion circuit and a power control circuit, wherein the voltage conversion circuit is used for converting a power control voltage and outputting a target control voltage; and the power control circuit is connected to the voltage conversion circuit and is used for performing power control on a received input signal according to the target control voltage, so as to obtain a target output signal. In this way, by means of the cooperation of a voltage conversion circuit and a power control circuit, a target control voltage performs power control on an input signal, such that the number of harmonic waves generated by a power amplifier during power back-off can be reduced, thereby improving the harmonic performance of the power amplifier.

Abstract: A temperature compensation circuit is configured to generate a first electrical signal corresponding to the current ambient temperature, use the first electrical signal to adjust a second electrical signal received by an electrical signal input end, and obtain a third electrical signal; and output the third electrical signal to a power control circuit. The power control circuit is configured to convert the third electrical signal into a fourth electrical signal and output the fourth electrical signal to a power amplifier. The fourth electrical signal is used for controlling the gain of the power amplifier to present a preset change rule following a temperature change. Thus, by adding the described temperature compensation circuit in a power amplification circuit, the stability of the gain and the stability of the output power of a power amplifier are ensured, and the performance of the power amplifier is not affected by a change in temperature.

Abstract: A phase compensation circuit module includes at least a variable resistor, a detection component and a control component. The detection component has a detection end connected with a signal input end of a power amplifier, and is configured to detect an input signal of the signal input end. The control component is connected with the detection component, and is configured to output a control signal according to the input signal detected by the detection component. The variable resistor is connected with an output end of the control component, and is configured to change resistance linked to the power amplifier according to the control signal, the variable resistor constitutes a loop of the power amplifier and is configured to form on-resistance of a transistor of the power amplifier. The on-resistance of the transistor is configured to change as a phase of an output signal of the power amplifier changes.

Abstract: A dual-band low-noise amplifier circuit includes an amplification sub-circuit and a switch frequency selection circuit; the amplification sub-circuit is used for performing gain amplification on a radio frequency signal to be amplified to obtain an amplified radio frequency signal, and outputting the amplified radio frequency signal; the switch frequency selection circuit is connected to the amplification sub-circuit, and is used for controlling the state of a switch in the switch frequency selection circuit on the basis of a target frequency band corresponding to the radio frequency signal to be amplified, so that the dual-band low-noise amplifier circuit meets optimal performance in the target frequency band. In this way, low-noise amplification of dual-band signals is achieved by means of the reconfigurable structure of the low-noise amplifier circuit, and parameters such as noise figure, gain, and linearity can be kept in optimal states in each frequency band.

Abstract: A compensation circuit module includes a variable resistor, a detection component and a control component. A detection end of the detection component is connected with a DC blocking capacitor of the power amplifier and is configured to detect a voltage swing of an input signal of the DC blocking capacitor. The control component is connected with the detection component and is configured to output a control signal according to the input signal detected by the detection component. The variable resistor is connected with the output end of the control component and is configured to change the resistance connected to the power amplifier according to the control signal, and the resistance of the variable resistor connected to the power amplifier is configured to constitute the feedback resistance of the power amplifier.

Abstract: A bias circuit of a power amplifier includes a first part circuit, a second part circuit and a power supply, in which the power supply is connected with a power supply end of the first part circuit; two ends of the first part circuit are connected in parallel with two ends of the second part circuit, and after parallel connection one end of a parallel circuit is connected with a gate of the first transistor of the power amplifier in a signal amplification circuit; the first part circuit is configured to provide a first bias voltage, and the second part circuit is configured to provide a second bias voltage; the two bias voltages are superimposed to provide a stable bias voltage; and an impedance of the bias circuit is in a preset range of the impedance.

Abstract: When a signal source sends a radio-frequency signal to an input amplification circuit, a control circuit sends a first control signal to the input amplification circuit according to the frequency of the radio-frequency signal, the input amplification circuit receives the first control signal and forms an input oscillation loop, the radio-frequency signal forms an amplified first signal through the input oscillation loop, and the input amplification circuit sends the first signal to the output amplification circuit. According to the frequency of the radio-frequency signal, the control circuit transmits a second control signal to the output amplification circuit, which forms an output oscillation loop matched with the first signal. The first signal is amplified by the output oscillation loop to form an emitting signal, the output amplification circuit transmits the emitting signal to the emitting antenna for emitting, thereby improving the utilization ratio of a radio-frequency front end chip package.

Abstract: A compensation circuit includes a power amplifier, a current bias circuit, a power detection circuit and a current control circuit; the power detection circuit is configured to detect the voltage amplitude of the radio frequency input signal of the power amplifier and output a reference current when the voltage amplitude meets a preset condition; the current control circuit is configured to receive a reference current and output a compensation current to the current bias circuit based on the reference current; the current bias circuit is configured to receive the compensation current and generate the direct-current bias current, and output the compensation current and the direct-current bias current to the power amplifier; and the power amplifier is configured to receive the compensation current and the direct-current bias current, and amplify the power of the radio frequency input signal based on the compensation current and the direct-current bias current.

Abstract: A bias circuit includes a mirror current source and a current-to-voltage converter. A first terminal of the mirror current source is connected to a supply voltage terminal, a second terminal of the mirror current source is connected to a reference voltage terminal, and a third terminal of the mirror current source is connected to the current-to-voltage converter. A mirror current source is configured to acquire a supply voltage transmitted at the supply voltage terminal through the first terminal, acquire a reference voltage transmitted at the reference voltage terminal through the second terminal, and regulate the supply voltage by using the reference voltage and a preset parameter to obtain a mirror current corresponding to the supply voltage. The preset parameter is parameter information of the mirror current source. The current-to-voltage converter is configured to convert the mirror current into a voltage to provide a bias voltage based on the voltage.

Abstract: A power distribution circuit applied to a radio frequency front-end transceiving apparatus includes a common-stage amplifying circuit and a branch-stage amplifying circuit, in which the branch-stage amplifying circuit comprises at least two parallel channel amplifying circuits; the common-stage amplifying circuit is configured to perform a first signal processing on a radio frequency signal received by an antenna of the radio frequency front-end transceiving apparatus to obtain a first power signal and output the first power signal to each of channel amplifying circuits, in which the first signal processing at least includes a buffering processing, an isolation processing and a low-noise amplifying processing; each channel amplifying circuit is configured to perform a second signal processing on the first power signal to obtain a second power signal and output the second power signal to a radio transceiving device; the second signal processing at least includes a low-noise amplifying processing.

Abstract: An amplitude modulation-phase modulation compensation circuit includes a detection circuit, a reconfigurable current control voltage source circuit and a phase shifting circuit, in which, the detection circuit is configured to detect the power of an input signal and output a control current according to the power of the input signal when the power of the input signal is greater than a preset power threshold; the reconfigurable current control voltage source circuit is configured to generate a bias voltage according to the control current; the phase shifting circuit is configured to compensate the AM-PM distortion of the radio frequency power amplifier according to the bias voltage. In this way, by the compensation circuit, when the power of the input signal is greater than a preset power threshold, the AM-PM distortion of the radio frequency power amplifier can be compensated according to the power of the input signal.

Abstract: An overvoltage protection and gain bootstrap circuit of a power amplifier includes a power amplification transistor, and a diode reversely connected with a gate of the power amplification transistor. A negative electrode of the diode is connected with the gate of the power transistor, and a positive electrode of the diode is connected with a constant voltage source, such that a function of overvoltage protection and gain bootstrap of the circuit is realized by controlling a turn-on state of the diode. By adding a diode device to the circuit, gate-drain overvoltage protection for the power amplification transistor can be provided, and the gain of the amplifier can be improved before power compression, thereby improving linearity of the power amplifier. The structure of the circuit can be simple, with reduced occupied area hardware cost.

Abstract: A radio frequency switch circuit includes a negative voltage generating circuit, a notch network, a logic control circuit, and a radio frequency switching circuit. The logic control circuit can be configured to, upon being driven by the negative voltage signal generated by the negative voltage generating circuit, control the operating modes of the radio frequency switching circuit; and the notch network is connected between the negative voltage generating circuit and the logic control circuit. As such, the influence of radio frequency signals generated by the radio frequency switching circuit can be filtered through the notch network, and the interference of radio frequency signals to the negative voltage generating circuit can be reduced, thereby improving the performance of the radio frequency switch circuit, for example in insertion loss, isolation and harmonic suppression.

Abstract: An compensation circuit for an Amplitude Modulation-Amplitude Modulation (AM-AM) of a Radio Frequency (RF) power amplifier, including: a first biasing circuit, a power amplifier, and a compensation circuit located between the first biasing circuit and the power amplifier; herein, the compensation circuit includes a diode detection circuit and a feedforward amplifier for compensating AM-AM distortion.

Abstract: A winding structure includes a coil having a wire wrap and two wire tails, and a magnetic core having a center column, a flange, four wire-hanging parts and two bosses; the center column is connected at a top surface of the flange, the first boss is disposed in the middle of a first side of the flange, and the second boss is symmetrical to the first boss; transition surfaces of wire-hanging parts to a bottom surface of the flange are chamfered surfaces; first to fourth sections of the first wire tail are sequentially attached to the first wire-hanging part and the first chamfered surface, the bottom surface of the flange, the third chamfered surface, the third wire-hanging part, and the top surface of the flange; first to fourth sections of the second wire tail are symmetrical to first to fourth sections of the first wire tail, respectively.

Abstract: An integrally formed inductor and a manufacturing method thereof, wherein the method comprises: sintering a soft magnetic material to prepare a magnetic core plate with a plurality of grooves; respectively putting hollow coils into the plurality of grooves; putting a magnetic core plate provided with coils into a forming die, adding a soft magnetic material in a fluid state, and integrally forming the soft magnetic material in the fluid state on the magnetic core plate through pressing; coating semi-finished inductors with an insulating material to form an insulating coating layer, and exposing only two terminals of the coils; areas where the coil terminals are exposed on a surface of the insulating coating layer being metallized to form electrodes of the integrally formed inductor. Therefore, the disclosure provides an integrally formed inductor which is subminiature in size, ultra-thin and high in reliability and a manufacturing method thereof.

Abstract: A circuit for processing radio frequency signal includes a first path and at least one other second path; herein the first path includes at least one radio frequency amplification device; a first radio frequency current generated by parasitic capacitance of the at least one radio frequency amplification device flows through the at least one second path; the circuit for processing the radio frequency signal further includes at least one resonance module, a first end of each of the at least one resonance module is connected with the first path, and a second end of each of the at least one resonance module is connected with at least a part of second paths of the at least one second path; and the at least one resonance module is configured to generate a resonance current opposite to the first radio frequency current.

Abstract: A digital-to-analog conversion circuit includes an operational amplification module having an operational amplifier connected to an output transistor to form a negative feedback circuit to obtain equal voltages at positive and negative ends. A negative end current flowing into the negative end is proportional to a positive end current flowing into the positive end. An input end of a conversion module is connected in parallel with a first resistor of the operational amplification module to obtain the same voltage as the first resistor, and an analog current proportional to the negative end current and positive end current. An output end of the conversion module is connected with the source of the output transistor and configured to receive the analog current and to make the analog current flow to an output resistor via the drain of the output transistor, to obtain an output current proportional to the positive end current.

Abstract: A power control circuit includes: a voltage-current converter and a programmable current amplifier; the voltage-current converter is configured to detect an inputted output power control signal, and to convert the output power control signal to a control current and output same; and the programmable current amplifier is configured to receive the control current and output the amplified control current as a bias current of the power amplifier connected to the power control circuit.

Abstract: In a radio frequency power amplifier with harmonic suppression, one end of an input matching circuit is connected with a radio frequency input end; and another end is connected with a base of a power amplification transistor having a collector connected with a power supply voltage through a first matching branch, and an emitter connected with a first connection point on a package substrate. The collector of the power amplification transistor is connected with a radio frequency output end through a second matching branch that is connected with the package substrate. A harmonic control circuit has a first end connected with the collector of the power amplification transistor, and a second end connected with a second connection point on the package substrate.