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Power detector and method of eliminating i‑v phase difference between transmit and detect paths

A detector and power amplifier technology, applied in the field of power detection, can solve the problems of unable to track the phase difference θ, unable to track the output power, etc., to achieve the effect of reducing the impact

Inactive Publication Date: 2018-02-16
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the phase delay is too large, then the detected power P det will not follow the output power P o , resulting in the inability to track the phase difference θ
Therefore, the detected power P det will not be able to track the output power P o change, the output power P o The variation of is caused by the non-ideal antenna

Method used

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  • Power detector and method of eliminating i‑v phase difference between transmit and detect paths
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  • Power detector and method of eliminating i‑v phase difference between transmit and detect paths

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Embodiment Construction

[0047] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0048]Certain terms are used in the description and claims of this application to refer to particular components. Those skilled in the art should understand that although hardware manufacturers may use different terms to refer to the same component, this specification and claims do not distinguish components by differences in names, but by differences in functions of components. criteria for distinction. The terms "comprising", "comprising" and other similar terms mentioned throughout the specification and claims are all open-ended terms, so they should be interpreted a...

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Abstract

Embodiments of the present invention provide a power detector and a method for eliminating the I-V phase difference between the transmission and detection paths. Wherein, the power detector includes: a phase shifter, a multiplier and a correction unit; wherein the phase shifter is coupled to the output end of the power amplifier, and is used to add multiple candidate phase corrections to the power amplifier in the correction mode in the output voltage signal to generate a plurality of adjustment signals; the multiplier is coupled to the phase shifter and the replica unit of the power amplifier, and is used to multiply the replica current by the plurality of adjustment signals from the phase shifter to output a plurality of a plurality of analog signals; the correction unit is coupled to the multiplier, and is used for determining a target phase correction amount of the phase shifter from a plurality of candidate phase correction amounts according to the plurality of analog signals.

Description

technical field [0001] The invention relates to the technical field of power detection, in particular to a power detector and a method for eliminating the I-V phase difference between transmission and detection paths. Background technique [0002] The power detector is used for performing a TSSI (transmission signal strength indication, transmission signal strength indication) operation, so as to perform transmission power compensation. The power detector needs to be insensitive to changes in the output impedance of the transmitter. Please refer to figure 1 , is a schematic structural diagram of a conventional power detector 100 for detecting the output power of the power amplifier 30 . The power detector 100 includes: a power amplifier replica unit (power amplifier replica) 40 , a multiplier 50 and a detection module 60 . The power amplifier 30 amplifies the input voltage Vi and outputs the amplified current I1, the power amplifier replica unit 40 receives the same input...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/318H04B1/04
CPCH04B17/0085H04B17/102H04B17/104H04B17/13H04B17/14H04B17/16H04B17/19G01R21/133H03F3/21
Inventor 张伯宇
Owner MEDIATEK INC