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Switched capacitor digital power amplifier

A technology of power amplifiers and switched capacitors, applied in amplifiers, amplifier types, radio frequency amplifiers, etc., can solve the problems of increasing difficulty in logic circuit drive circuit design, affecting the linear performance of power amplifiers, and poor practicability, so as to save hardware circuit resources and improve High circuit efficiency and high compatibility

Pending Publication Date: 2022-04-22
PEKING UNIV
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Problems solved by technology

In order to achieve the above goals, the author used three levels in the local oscillator signal, which directly led to a great increase in the difficulty of designing the previous logic circuit and even the driving circuit, greatly reducing the advantages that this technology can bring, poor practicability, and even Affect the linear performance of the entire power amplifier, the loss outweighs the gain

Method used

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  • Switched capacitor digital power amplifier
  • Switched capacitor digital power amplifier
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Embodiment Construction

[0029] In order to make the technical solution of the present invention clearer, it will be described in detail below in conjunction with the accompanying drawings.

[0030] Such as Figure 4 Shown is a switched capacitor digital power amplifier based on quadrature unit sharing technology implemented in TSMC 40nm CMOS process, including input buffer stage, 25% duty ratio quadrature signal generator, commutation circuit, driver stage circuit, quadrature The units share the logic circuitry as well as the digital power amplifier output stage circuitry. The output end of the input buffer stage is connected to the input end of the 25% duty cycle quadrature signal generator, the output end of the 25% duty cycle quadrature signal generator is connected to the input end of the commutation circuit, and the output end of the commutation circuit is connected to the input end of the driver stage circuit The output terminal of the driving stage circuit is connected with the input terminal...

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Abstract

The invention discloses a switched capacitor digital power amplifier, and belongs to the technical field of integrated circuits. The switched capacitor digital power amplifier comprises an input buffer stage, a 25% duty ratio orthogonal signal generator, a commutation circuit, a driving stage circuit, an orthogonal unit sharing logic circuit and a digital power amplifier output stage circuit. The orthogonal unit sharing logic circuit comprises two AND gate switches and an OR gate, the AND gate switches gate two paths of orthogonal signals and send the two paths of orthogonal signals to the post-stage OR gate, and the OR gate directly splices and synthesizes the two paths of signals based on the time domain non-overlapping characteristic of the orthogonal signals with the duty ratio of 25%, so that the orthogonal unit sharing of the power amplifier is realized. The switched capacitor digital power amplifier has the advantages of being high in energy efficiency, good in circuit compatibility, high in reliability, small in hardware resource overhead and the like.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits and relates to a high-efficiency digital power amplifier, in particular to a switched capacitor digital power amplifier (SCDPA) based on an orthogonal unit sharing technology. Background technique [0002] The power amplifier (Power Amplifier) ​​is a radio frequency integrated circuit module used to amplify high-frequency signals with high efficiency, and is used in the transmitter system for signal amplification and transmission. The schematic diagram of the power amplifier applied to the transceiver system is as follows figure 1 As shown, its input terminal is connected to the previous signal source or baseband, so as to obtain the baseband signal carrying information. After being amplified linearly and without distortion, the signal carrying information and with sufficient energy is fed into the antenna from the output terminal, thereby completing the signal transmission. , Informa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/02H03F3/195H03F3/217
CPCH03F1/02H03F3/195H03F3/217H03F2200/451
Inventor 廖怀林王栋刘军华姜皓云
Owner PEKING UNIV
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