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Voltage sampling circuit and circuit system

A sampling circuit and voltage sampling technology, applied in the field of communication, can solve the problem of uneven voltage of each BUS, and achieve the effect of voltage stability

Active Publication Date: 2021-08-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The embodiment of the present invention provides a voltage sampling circuit and circuit system to at least solve the problem of uneven voltage of each BUS in the differential sampling circuit in the related art

Method used

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  • Voltage sampling circuit and circuit system
  • Voltage sampling circuit and circuit system

Examples

Experimental program
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Embodiment 1

[0026] This application document provides a voltage sampling circuit, which can be applied to the voltage sampling of multiple PFC series input bus circuits BUS, that is, there are multiple BUS circuits, and each BUS circuit can be sampled according to the voltage recorded in this embodiment. The circuit is set.

[0027] In this embodiment, a voltage sampling circuit is provided, figure 1 is a schematic diagram of a voltage sampling circuit according to an embodiment of the present invention, such as figure 1 As shown, the process includes the following steps: the voltage sampling circuit may include four parts:

[0028] S1, high resistance isolation circuit; S2, differential sampling circuit with blocking unit; S3, filter circuit; S4, control unit.

[0029] In the above S2 part, the differential sampling circuit for sampling the BUS circuit is shown, wherein, at the connection between the differential sampling circuit and other BUS circuits, a blocking unit is provided on t...

specific Embodiment approach

[0047] figure 2 It is a structural block diagram of a multi-channel serial BUS voltage sampling circuit with a blocking function according to a specific embodiment, such as figure 2 As shown, the voltage sampling circuit includes four parts, a high-impedance isolation circuit, a differential sampling circuit with a blocking function, a filter circuit, and a control unit, wherein the control unit includes DSP analog-to-digital conversion for loop calculation.

[0048] For a topology with multiple PFCs in series or similar functions, the BUS voltage sampling circuit with a blocking unit is a simple and effective sampling circuit. The circuit can be subdivided into four hardware units. attached figure 1 The hardware circuit in the circuit implements the isolation and sampling of the single-channel BUS voltage and sends the sampled voltage signal to the CPU for loop calculation after filtering.

[0049] The S1 module is an input resistor, which is a part of the differential s...

Embodiment 2

[0056] According to another embodiment of the present invention, a circuit system is provided, including the voltage sampling circuit described in any one of the above-mentioned embodiments.

[0057] Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Alternatively, they may be implemented in program code executable by a computing device so that they may be stored in a storage device to be executed by a computing device, and in some cases in an order different from that shown here The steps shown or described are carried out, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation. As such, the p...

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Abstract

The present invention provides a voltage sampling circuit and a circuit system, wherein the voltage sampling circuit includes: a differential sampling circuit for sampling a BUS circuit, wherein, at the connection between the differential sampling circuit and other BUS circuits, all A blocking unit is provided on one side of the differential sampling circuit. By adopting the above technical solution, the problem of uneven voltage of each BUS in the differential sampling circuit in the related art is solved, the charging loop caused by the sampling circuit is blocked, and the voltage stability of each BUS position is guaranteed.

Description

technical field [0001] The present invention relates to the communication field, in particular to a voltage sampling circuit and a circuit system. Background technique [0002] In related technologies, switching power supplies are currently developing toward the goals of high power density, high efficiency, and low cost. To increase the power density of the power supply, you can choose devices with the same performance and smaller packages, and you can also reduce the volume of magnetic devices such as transformers and inductors by increasing the switching frequency. High efficiency needs to reduce the switching loss and conduction loss of the switch tube, which can be realized by selecting new components and suitable topology. Low cost needs to reduce cost through the selection of topology and device under the premise of satisfying high power density and high efficiency. Of course, the choice of topology also determines the selection range of devices used. The structure o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/00H02M1/42
CPCH02M1/42H02M1/0038G01R19/00G01R31/36Y02B70/10
Inventor 樊珊珊杨运东王方淳
Owner ZTE CORP
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