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A power detection circuit and power detector

A power detection circuit and capacitor technology, which is applied in the direction of measuring electricity, measuring electric power through current/voltage, measuring electric variables, etc., can solve the problems of small dynamic range of power detection circuit and so on.

Active Publication Date: 2021-09-10
BEIJING INST OF RADIO MEASUREMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, when the input signal is slightly larger, BJT tube Q1 and BJT tube Q2 are easily saturated, resulting in a small dynamic range of the power detection circuit

Method used

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  • A power detection circuit and power detector
  • A power detection circuit and power detector
  • A power detection circuit and power detector

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Embodiment Construction

[0033] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0034] In the description and claims of the present invention and the above drawings, the terms "first", "second", etc. are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units,...

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Abstract

The invention discloses a power detection circuit and a power detector. On the basis of the traditional power detection circuit, a non-matching BJT tube Q4 is added, and the base of the BJT tube Q4 is connected to the BJT tubes Q1 and Q2 through two resistors R1 and R2. At the same time, BJT tube Q5 is added as a current source to provide current for BJT tube Q1, BJT tube Q2, and BJT tube Q4, so that the differential input BJT tubes Q1 and Q2 both work in the class A amplification area. The power detection circuit of the present invention has simple circuit structure, small area, low cost and excellent performance, and can realize power detection with wide dynamic range, low temperature sensitivity and low frequency sensitivity. The invention also discloses a power detector comprising the above-mentioned power detection circuit.

Description

technical field [0001] The invention relates to the technical field of power detection. More specifically, it relates to a wide dynamic range power detection circuit and power detector of a silicon-based process. Background technique [0002] In the radio frequency system, the power detector is used to detect the power of the same node, so as to adjust the gain or output power. Therefore, power detectors have been widely used in radio frequency systems. [0003] For traditional power detectors, since the input has not been attenuated, the output signal of bipolar junction transistor (BJT) Q1 and BJT tube Q2 has a great correlation with the input signal power, and both BJT tube Q1 and BJT tube Q2 work at Area B. In this way, when the input signal is slightly larger, the BJT transistor Q1 and the BJT transistor Q2 are easily saturated, resulting in a relatively small dynamic range of the power detection circuit. [0004] Therefore, it is necessary to provide a power detect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R21/06G01R1/30
CPCG01R1/30G01R21/06
Inventor 陈鹏鹏曹佳陈鹏伟彭尧齐全文
Owner BEIJING INST OF RADIO MEASUREMENT