Smarter Microelectronics (guang Zhou) Co., Ltd.

Jiangtao Yi

Qiang Su

Baiming Xu

Yang Li

Chifeng Liu

Huadong Wen

Zhenfei Peng

Xin Zhang

Jinliang Deng

Shuai Chen

Yang Hou

Qiming Wang

Guoguo Yan

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.

Power distribution circuit and radio frequency front-end transceiving apparatus

A switch circuit includes an antenna port and at least one switch branch. Each branch includes a first, a second, and a third switches. The antenna port has one end connected with an antenna, and another end electrically connected with one end of the first switch of each branch respectively. The other end of the first switch of each branch is electrically connected with one end of the second switch corresponding to each branch and one end of the third switch corresponding to each branch respectively; the other end of each of the second switch corresponding to each branch is connected with a ground terminal; the other end of each of the third switch corresponding to each branch is electrically connected with one end of a load corresponding to each branch; and the other end of the load corresponding to each branch is connected with the ground terminal.

Switch circuit, control method, control device, radio frequency switch and readable storage medium

A power control circuit includes a negative feedback loop, and a radio frequency signal path including a first NMOS transistor having a gate configured as a radio frequency signal input end, a drain connected with a source of a second NMOS transistor, and a source connected with a ground terminal. A drain of the second NMOS transistor is configured as a radio frequency signal output end and connected with a first voltage source. The negative feedback loop includes a third NMOS transistor having a gate connected with an output end of a differential amplifier, a source connected with the ground terminal, and a drain connected with a source of a fourth NMOS transistor having a gate connected with a reverse input end of the differential amplifier and with a second voltage source, and a drain connected with a forward input end and a first bias current source.

Power control circuit

A gain compression compensation circuit of a radio frequency power amplifier includes: a low-pass filtering module configured to receive a part of radio frequency signals output from a first power amplification transistor and to filter, from the part of radio frequency signals, radio frequency signals with a frequency above a fundamental wave to obtain a filtered signal; and a rectifying module configured to receive the filtered signal output by the low-pass filtering module and to rectify the filtered signal to obtain a rectified current; and to output the rectified current to a bias transistor and superimpose the rectified current with a bias current Ito flow into the bias transistor.

Gain compression compensation circuit of radio frequency power amplifier

A power control device includes: a controller configured to, when a frequency band selection instruction is detected, determine a target frequency band from the frequency band selection instruction in response to the frequency band selection instruction; and to determine, based on the target frequency band, a target inter-stage matching circuit of a path from a plurality of inter-stage matching circuits; a driving element configured to, when an input power signal within the target frequency band is received, pre-amplify the input power signal to obtain a pre-amplified power signal and transmit the pre-amplified power signal to the target inter-stage matching circuit; the target inter-stage matching circuit configured to process the pre-amplified power signal to obtain an intermediate input signal and provide the intermediate input signal to a power stage amplification circuit; the power stage amplification circuit configured to amplify the intermediate input signal to obtain an output power signal.

Power control device and method, and storage medium

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.

Compensation circuit for amplitude modulation-amplitude modulation of radio frequency power amplifier

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.

Digital-to-analog conversion circuit

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.

Power control circuit and power amplification circuit

A power control circuit includes a voltage control circuit and a current control circuit. The voltage control circuit is configured to detect an output power control signal that is inputted, convert the output power control signal into a control voltage and output the control voltage to the driver stage of a power amplifier connected to the power control circuit. The current control circuit is configured to detect an output power control signal that is inputted, convert the output power control signal into a control current and output the control current to the amplification stage of the power amplifier.

Power control circuit and power amplifier circuit

A radio-frequency power amplification circuit includes: a power amplification sub-circuit and an output matching sub-circuit, wherein the power amplification sub-circuit is used for selecting, according to a received control signal corresponding to a radio-frequency mode, a power amplification parameter corresponding to the radio-frequency mode to amplify a received radio-frequency signal, and outputting the amplified radio-frequency signal; the output matching sub-circuit is connected to the power amplification sub-circuit and is used for receiving the amplified radio-frequency signal, and transmitting, according to the control signal, the amplified radio-frequency signal by using an impedance corresponding to the radio-frequency mode.

Radio-frequency power amplification circuit and radio-frequency mode adjustment method

A Miller compensation circuit includes: a differential amplifier having an inverse input end configured to receive an input signal; an output transistor having an output end connected to a positive input end of the differential amplifier, a first end connected to a first power supply, a second end connected to an output end of the differential amplifier, and a third end being a voltage output end and connected to the positive input end and a load; a Miller capacitor connected to the output end of the differential amplifier; a follower; and a current sampling circuit configured to sample a first current of the output transistor. The load is also connected to a second power supply.

Miller compensation circuit and electronic circuit

A transistor circuit of low shutoff-state current includes: a first transistor, a transistor string, and a switch. The first transistor and the transistor string are connected in series. The switch is configured to shut off the circuit. The first transistor is configured to reduce the shutoff-state current flowing therethrough using the negative feedback effect of the transistor string when the circuit is in a shutoff state; and the transistor string is configured to reduce the shutoff-state current flowing therethrough using a negative gate-source electrode voltage difference thereof and the bulk effect of the transistor.

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Guangzhou, China

Jiangtao Yi