A switched capacitor high bandwidth envelope tracking power supply circuit and its control method

A switched-capacitor circuit, tracking power technology, applied in electrical components, output power conversion devices, conversion equipment without intermediate conversion to AC, etc. The problem of shortening the turn-off time can reduce the complexity and cost of the circuit, improve the switching performance and reliability, and extend the turn-on and turn-off time.
CN108616217BActive Publication Date: 2020-04-14NANJING TECH UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING TECH UNIV
Publication Date
2020-04-14

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Abstract

The invention discloses a switched capacitor type high-bandwidth envelope tracking power supply circuit, which includes a step wave voltage generating circuit and a class A linear amplifier, the step wave voltage generating circuit and the class A linear amplifier are connected in cascade, and the step wave voltage generating circuit The output is used as the input of a class A linear amplifier. The ladder wave voltage generating circuit is composed of n switched capacitor circuits with the same structure in series. The switching frequency of the switching tube in each switched capacitor circuit can achieve (1 / n):1 frequency reduction relative to the tracking signal frequency, and at the same time effectively expand The turn-on or turn-off time of the switch tube can be fully turned on or off to improve its working performance and reliability under high-bandwidth tracking conditions; compared with traditional methods, it can greatly reduce the number of power supplies and reduce the complexity of the circuit level and cost, and improve system efficiency.
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Description

technical field

[0001] The invention relates to a switched capacitor type high-bandwidth envelope tracking power supply, which is applied to wireless communication occasions. Background technique

[0002] The development of mobile communication started from the first generation of mobile communication (1st Generation, 1G) commercially available in the late 1970s to the fourth generation of mobile communication (4th Generation, 4G) commercially available today, both in terms of modulation and information transmission Quantitatively, there has been a huge change. The first generation of mobile communication technology (1G) mainly uses analog cellular network technology, and the implementation methods include frequency division multiple access and carrier multiplexing. The second generation of mobile communication technology (2nd Generation, 2G) uses digital communication technology, through time division and code division multiple access technology to realize radio frequency ...

Claims

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