Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A power amplifier power filter circuit

A technology of filter circuit and discharge source, applied in the field of filter circuit, can solve the problems of large area of ​​printed circuit board, many filter circuit devices, waste of circuit board space, etc., and achieve the effect of low cost, reduced cost of components, and simplified filter circuit

Active Publication Date: 2017-10-27
NANJING AOTO ELECTRONICS CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Problems in the prior art: under the existing technical conditions, due to the large size of the transformer itself, the filter circuit realized by the transformer occupies a large area of ​​the printed circuit board, wasting the space of the circuit board; in addition, the price of the transformer itself is relatively high, And there are too many filter circuit components, resulting in high cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A power amplifier power filter circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0011] In the present invention, a MOS tube is used instead of a commonly used transformer to filter the power supply and the ground respectively, which can effectively isolate the power supply interference signal.

[0012] This embodiment provides a power amplifier power filter circuit, which uses two MOS tubes instead of transformers to filter the power supply and ground respectively, thereby realizing the function of isolating interference signals. The circuit schematic diagram is as follows figure 1 Shown:

[0013] Among them, J1 is the power input terminal, which supports DC12V / 24V input. The input voltage Vin and the ground DGND are respectively filtered through the N-MOS transistor QP0 and the P-MOS transistor QP1, and the N-MOS transistor QP0 and the P-MOS transistor QP1 are used as switches. use. After the circuit is connec...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The power amplifier power supply filter circuit of the present invention uses two MOS tubes to filter the power supply and the ground respectively, and the input voltage Vin and the ground DGND are respectively filtered through the N-MOS tube QP0 and the P-MOS tube QP1, wherein QP0 and QP1 are used as switches; After the circuit is connected to the power supply, after Vin is divided by RP0 and RP1, it is filtered by EP0 and CP0 to provide a stable gate voltage for QP0. QP0 is in the conduction state, and Vin is filtered by E1 and CP1 to output a stable voltage VP, which is the power amplifier. The board circuit provides the working voltage; the voltage VP is pulled up by the resistor R2 and then filtered by EP2 to output a stable voltage VPA to provide the working voltage for the power amplifier chip; after VP is divided by RP5 and RP3, it provides a stable gate for the P-MOS transistor QP1 voltage, QP1 is in the conduction state, and DGND is filtered by EP2 and CP2 to output a stable ground signal GND.

Description

technical field [0001] The invention relates to a filter circuit, in particular to a power amplifier filter circuit. Background technique [0002] At present, on the power amplifier board, a transformer is usually used for filtering, isolating the electromagnetic interference signal affecting the power supply, and providing a stable and pure voltage to the power amplifier circuit. [0003] Problems in the prior art: under the existing technical conditions, due to the large size of the transformer itself, the filter circuit realized by the transformer occupies a large area of ​​the printed circuit board, wasting the space of the circuit board; in addition, the price of the transformer itself is relatively high, In addition, there are too many filter circuit components, resulting in high cost. Contents of the invention [0004] Aiming at the deficiencies in the prior art, the present invention aims to provide a filter circuit, which can isolate the electromagnetic interfere...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/44
Inventor 矫人全常彦青张岳琴陈文王勇
Owner NANJING AOTO ELECTRONICS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com