A Sampling Method for Envelope Tracking Power Supply

A technology of envelope tracking and power supply, which is applied in the direction of electrical components, amplifier parts, amplifiers, etc., can solve the problems of long power supply response time, slow load response speed, and no immediate response, etc., to achieve fast load response speed, The effect of reducing the load switching time and reducing the delay problem

Active Publication Date: 2022-06-07
SHAANXI REACTOR MICROELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the load jumps instantaneously, that is, from light load to heavy load or from heavy load to light load, the second voltage V2 can respond quickly, but it will not respond immediately after filtering, and needs to wait for the filter to process, resulting in slow load response of the system
Therefore, the envelope tracking power supply in the prior art adds low-pass filters to the two sampling terminals of the sampling control module, although the normal operation of the power supply is maintained, but the power supply response time is relatively long

Method used

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  • A Sampling Method for Envelope Tracking Power Supply
  • A Sampling Method for Envelope Tracking Power Supply
  • A Sampling Method for Envelope Tracking Power Supply

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Embodiment Construction

[0030] References will be made below to the drawings Figures 1 through 6 Specific embodiments of the present invention are described in more detail. Although specific embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to be able to more thoroughly understand the present invention, and to be able to communicate the scope of the present invention completely to those skilled in the art.

[0031]It should be noted that certain terms are used in the description and claims to refer to specific components. Those skilled in the art should appreciate that skilled persons may use different nouns to refer to the same component. This specification and the claims do not use the difference of nouns as a way to distinguish components, but the difference in functionality of components as a criteri...

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Abstract

The invention discloses a sampling method of an envelope tracking power supply. In the method, the envelope signal outputs a first voltage V1 after passing through a linear amplifier, and the first voltage V1 includes a DC voltage V11 and an AC voltage. The sampling control module passes through a low-pass The filter collects the DC voltage V11 in the first voltage V1 and directly collects the second voltage V2. The second voltage V2 is an output voltage including DC and AC voltages. When the DC voltage V11 is greater than the second voltage V2 and the hysteresis of the comparator When returning to the sum of h, the sampling control module generates the first signal, so that the upper tube M1 of the switching power supply is turned on, the lower tube M2 is turned off, and supplies power to the load. When the DC voltage V11 is less than the second voltage V2 and the hysteresis h of the comparator When there is a difference, the sampling control module generates a second signal, so that the upper transistor M1 of the switching power supply is turned off, and the lower transistor M2 is turned on, so that the second voltage V2 is equal to the first voltage V1.

Description

Technical field [0001] The present invention belongs to the field of envelope tracking power supply, in particular a sampling method of envelope tracking power supply. Background [0002] The envelope tracking power supply is used to control the power supply voltage of the RF power amplifier and dynamically adjust the voltage according to the signal. The envelope tracking power supply has a power supply response problem due to sampling delay during the power supply process, that is, the power supply cannot be powered normally due to the long power supply response time. [0003] In the traditional envelope tracking power supply, the sampling control module mostly uses voltage mode, current mode, COT control, etc., and the reference voltage and the reference voltage are required to be DC signals. If the reference voltage and the reference voltage are directly into the sampling control module, the coupling capacitor C between the reference voltage and the referenced voltage will hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/02
CPCH03F1/0227
Inventor 夏勤何世宝
Owner SHAANXI REACTOR MICROELECTRONICS
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