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Design method of filter circuit, filter circuit and module

A technology of filter circuit and design method, applied in the field of filter circuit design, filter circuit and module, can solve the problems of large module size and excessive number of filter capacitors, so as to reduce the number, facilitate integration, and reduce hardware costs. Effect

Pending Publication Date: 2021-03-16
重庆芯讯通无线科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a design method of a filter circuit, a filter circuit and module

Method used

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  • Design method of filter circuit, filter circuit and module
  • Design method of filter circuit, filter circuit and module
  • Design method of filter circuit, filter circuit and module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a design method for a filter circuit, such as figure 1 As shown in the figure, it is used for filtering the power supply pins of the chip in the module, the chip includes at least two power supply pins, the filter circuit includes a filter capacitor, and two of all the power supply pins supply power to the target pin, the design method includes:

[0027] Step 101, setting one of the filter capacitors at a position within a preset distance from the two target power supply pins;

[0028] Step 102, electrically connecting one end of the filter capacitor to the two target power supply pins and the power supply output end respectively;

[0029] Step 103: Ground the other end of the filter capacitor.

[0030] Specifically, the preset distance in this embodiment is less than 3 mm, and the distance between the two target power supply pins is the closest to the filter capacitor, or the two adjacent target power supply pins are connected to the filter c...

Embodiment 2

[0034] This embodiment provides a filter circuit, such as figure 2 As shown, for the filtering of the power supply pins of chip 1, the chip 1 includes at least two power supply pins VCC1 and VCC2, the filter circuit includes a filter capacitor C1, and there are two power supply pins in all the power supply pins. One is the target power supply pins VCC1 and VCC2. During PCB layout, one of the filter capacitors C1 is set at a position within a preset distance from the two target power supply pins VCC1 and VCC2. One end is electrically connected to the two target power supply pins VCC1 and VCC2 and the power output end 2 respectively, and the other end of the filter capacitor C1 is grounded.

[0035] In this embodiment, the power output terminal 2 is the output terminal of the power management unit.

[0036] Specifically, the preset distance in this embodiment is less than 3 mm, and the distance between the two target power supply pins is less than the distance between each of ...

Embodiment 3

[0042] This embodiment provides a module, such as Figure 5 As shown, the module 3 includes the filter circuit in the second embodiment.

[0043] Compared with the existing module, the module provided in this embodiment, while implementing the corresponding filtering function, reduces the number of filter capacitors, reduces the hardware cost, further reduces the layout area of ​​the device, and thus reduces the package size of the module. Conducive to the integration of modules.

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Abstract

The invention discloses a design method of a filter circuit, the filter circuit and a module, the design method of the filter circuit is used for filtering power supply pins of a chip, the chip comprises at least two power supply pins, the filter circuit comprises a filter capacitor, two of all the power supply pins are target power supply pins, and the other two of the power supply pins are target power supply pins. The design method comprises the steps that one filter capacitor is arranged at the position within the range of the preset distance from the two target power supply pins; one endof the filter capacitor is electrically connected with the two target power supply pins and a power supply output end; and the other end of the filter capacitor is grounded. Through the design methodof the filter circuit, the number of the filter capacitors can be effectively reduced, the hardware cost is reduced while the corresponding filter function is realized, the device layout area is further reduced, the packaging size of the module is reduced, and the integration of the module is facilitated.

Description

technical field [0001] The invention relates to the technical field of hardware circuit design, in particular to a design method of a filter circuit, a filter circuit and a module. Background technique [0002] With the development of electronic technology, the requirements for the high integration of modules and the stability of the system are getting higher and higher. In order to ensure the stability of the system circuit, a filter circuit is often added between the PMU (Power Management Unit, power management unit) and the CPU (Central Processing Unit, central processing unit). One or more capacitors are added to the power supply pins, which results in too many filter capacitors in the circuit and requires a larger layout area of ​​the device, which in turn leads to an excessively large module size. At the same time, due to the limited layout space close to the CPU pins , the placement of some filter capacitors has to be far away from the CPU pins, so that the filtering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/44
CPCH02M1/44
Inventor 谭长顺
Owner 重庆芯讯通无线科技有限公司