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38results about How to "Improve rollback efficiency" patented technology

Radio frequency power amplification circuit based on artificial nonlinear matching network

PendingCN112491372AGood amplitude-phase linearityReduce path delayHigh frequency amplifiersPower amplifiersControl signalHemt circuits
The invention discloses a radio frequency power amplification circuit based on an artificial nonlinear matching network, and the input end of a power amplification transistor is connected with a radiofrequency signal input port and a radio frequency detection unit through an input matching network and a phase compensation network. The output end of the power amplifier transistor is connected witha radio frequency signal output port through an artificial nonlinear matching network; wherein the radio frequency detection unit is respectively connected with the artificial nonlinear matching network and the phase compensation network after sequentially passing through the comparison judgment unit, the cross-coupled logic inverter and the control signal generation and buffer unit, and the connection of elements in the artificial nonlinear matching network is configured through a power detection and logic control radio frequency switch. The power amplifier transistor can obtain the optimalload impedance at two or more power points. According to the invention, the power amplifier transistor can obtain the optimal load impedance at two or more power points, and a single-branch and large-bandwidth scheme is provided for the design and implementation of a radio frequency power amplification circuit with enhanced fallback efficiency.
Owner:XI AN JIAOTONG UNIV

Speed control device for backtrack of electrode original path in electric machining process

The invention provides a speed control device for backtrack of an electrode original path in electric machining process, and the speed control device comprises a single board computer, an actuator, a motor and an electrode which are connected in sequence. The actuator is connected with a numerical control system through data wires. In the electric machining process, the speed control device for backtrack of the electrode original path can carry out speed adjustment for backtrack of the electrode original path according to a processing technical algorithm, thereby improving backtrack efficiency of the electrode original path and the electric machining efficiency.
Owner:INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS

Transaction rollback method based on data processing and related equipment

PendingCN110135851AImprove the efficiency of repayment transaction rollbackImprove rollback efficiencyFinanceProtocol authorisationPaymentProgram planning
The embodiment of the invention discloses a transaction rollback method based on data processing and related equipment. The method is applied to the technical field of finance. The method comprises the steps of receiving a return request for a to-be-returned transaction sent by a terminal, searching a historical repayment plan matched with the borrowing identification of the to-be-returned transaction, determining a target repayment period corresponding to the transaction time of the to-be-returned transaction from the at least one repayment period; deleting the repayment sub-plans of the target repayment period and each repayment sub-plan after the target repayment period from the historical repayment plans to obtain a first payment plan; on the basis of the repayment record information indicated by each repayment sub-plan before the target repayment period, reconstructed the repayment sub-plan of the target repayment period and each repayment sub-plan after the target repayment period in the first repayment plan, obtaining a second repayment plan after the to-be-repaid transaction is refunded. By adopting the method and the device, the rollback efficiency of the repayment transaction can be improved.
Owner:PINGAN PUHUI ENTERPRISE MANAGEMENT CO LTD

Load modulation differential power amplifier, base station and mobile terminal

The invention provides a load modulation differential power amplifier, a base station and a mobile terminal. The load modulation differential power amplifier comprises a main power amplifier branch and an auxiliary power amplifier branch, the main power amplifier branch comprises a main power amplifier unit, the auxiliary power amplifier branch comprises a differential power amplifier, the outputend of the main power amplifier branch is connected with one output terminal of the auxiliary power amplifier branch, and the other output terminal of the auxiliary power amplifier branch is connectedwith a rear matching network. The load modulation technology is applied to the differential power amplifier, the broadband advantage of the differential power amplifier is reserved, high fallback efficiency similar to that of a Doherty power amplifier can be achieved, and the load modulation differential power amplifier has huge application prospects in a communication system.
Owner:优镓科技(北京)有限公司 +1

Linear efficient multi-body power amplifier based on harmonic impedance matching

The invention relates to a linear efficient multi-body power amplifier based on harmonic impedance matching, which is characterized in that on the basis of a traditional Doherty power amplifier structure, a simple circuit structure is utilized to match an input / output fundamental wave resistor and a harmonic wave resistor of a sub-power amplifier of the power amplifier, so that the efficiency of the sub-power amplifier is improved; the saturation output power and the saturation output current of a peak power amplifier are improved by matching the input / output fundamental wave impedance, the second harmonic impedance and the third harmonic impedance of the peak power amplifier for the first time, so that the Doherty power amplifier has better load modulation; and finally, a carrier power amplifier is biased in the class AB, so that the linearity of the Doherty power amplifier in a low-power region is ensured, meanwhile, a proper peak power amplifier gate bias voltage is selected, and the linearity of the Doherty power amplifier in a high-power region is finally ensured by utilizing the mutual influence effect of the carrier power amplifier and the peak power amplifier.
Owner:TIANJIN UNIV MARINE TECH RES INST

Dual-mode matching irregular structure Doherty power amplifier based on reflection coefficient circle optimization

The invention discloses a dual-mode matching irregular structure Doherty power amplifier based on reflection coefficient circle optimization. The dual-mode matching irregular structure Doherty power amplifier comprises a coupler, a carrier amplification circuit, a peak amplification circuit, an irregular structure carrier dual-mode output matching network, an irregular structure peak dual-mode output matching network and a combining load. The uplink signal output end of the coupler is sequentially connected with a carrier phase compensation line, a carrier input matching network, a carrier transistor and an irregular structure carrier dual-mode output matching network in the carrier amplifying circuit; and the lower signal output end of the coupler is sequentially connected with a peak phase compensation line, a peak input matching network, a peak transistor and an irregular structure peak dual-mode output matching network in the peak amplification circuit. And the output ends of the carrier amplification circuit and the peak amplification circuit are directly connected with the combining load. A Doherty power amplifier is designed by combining a dual-mode matching network optimization method based on a reflection coefficient circle with an irregular structure, and broadband and high-efficiency working characteristics are realized.
Owner:JIANGSU UNIV

Millimeter wave transmitter and time modulation power amplification circuit thereof

The invention discloses a millimeter wave transmitter and a time modulation power amplification circuit thereof. The time modulation power amplification circuit comprises cascaded amplification units. Each amplification unit comprises a lower transistor whose gate is coupled with a modulation signal and whose first pole is connected with a common terminal; the first electrode of the upper transistor is connected with the second electrode of the lower transistor, and the second electrode is connected with the power supply end through a load; the input end of the power matching network is connected with the second electrode of the upper transistor, and the output end of the power matching network is used for outputting amplified signals; for the first-stage amplification unit, the grid electrode of the upper transistor is coupled with a central signal, and the grid electrode of the upper transistor of each subsequent amplification unit is coupled with the output end of the power matching network of the preceding-stage amplification unit. The cascaded amplification units have very high circuit rollback efficiency; the time modulation power amplification circuit can restrain higher harmonics, can restrain third and fifth harmonics when forming a four-channel or eight-channel drive circuit, and improves the space beam efficiency.
Owner:SHANGHAI JIAO TONG UNIV
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