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

Noise Suppression Circuit for Power Adapter

A power adapter, noise suppression technology, applied in the direction of electrical components, output power conversion devices, etc.

Active Publication Date: 2016-06-08
APPLE INC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Type A adapter 120, on the other hand, does not have a ground pin and therefore induces noise that can enter the connected electronic equipment that the adapter powers.
[0005] Because many electronic devices use Type A adapters, the challenge is to suppress the noise induced in those devices while using that adapter

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
  • Noise Suppression Circuit for Power Adapter
  • Noise Suppression Circuit for Power Adapter
  • Noise Suppression Circuit for Power Adapter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] In the following description of example embodiments, reference is made to the accompanying drawings in which specific embodiments that may be practiced are shown by way of illustration. It is to be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the various embodiments.

[0013] The present disclosure relates to noise suppression circuits for power adapters that may be used to suppress noise induced by the adapter that adversely affects desired signals in devices powered by the adapter. In some implementations, the noise suppression circuitry may include active circuitry that detects and attenuates or cancels noise induced in the adapter. In some embodiments, the noise suppression circuit may include an RLC tuned circuit in parallel with the adapter choke to suppress noise induced by the choke at the operating frequency of the connected electronic device. Alternatively, the RLC tuning circuit may ...

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

A noise suppression circuit for a power adapter is disclosed. The noise suppression circuit can reduce or eliminate adapter-induced noise that could interfere with an electronic device powered by the adapter. In one example, the noise suppression circuit can include an active circuit to detect and attenuate or cancel the induced noise. In another example, the noise suppression circuit can include an RLC circuit in parallel with the adapter choke to suppress the induced noise at the operating frequencies of the powered electronic device. In still another example, the noise suppression circuit can include a modified adapter Y capacitor connection so as to bypass the adapter choke, thereby reducing or eliminating the choke's induced noise.

Description

technical field [0001] The present invention relates generally to power adapters, and more particularly to noise suppression circuits for power adapters. Background technique [0002] Noise can be a persistent problem for electronic equipment because noise can come from various sources (both internal and external) and can adversely affect the desired signal of the device. In some cases, noise can involve power adapters used to power electronic equipment. [0003] Figure 1A with 1B Two types of power adapters commonly used to power electronic devices are described. exist Figure 1A For example, a "Type B" power adapter 110 may include a plug 112 that plugs into a power source, such as a wall outlet, to receive a voltage, such as AC voltage. The plug 112 may have three pins, including a live voltage pin 112-a, a neutral pin 112-b, and a ground pin 112-c. The adapter 110 may also include a connector 113 to connect to the electronic device in order to transmit a voltage, su...

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
CPCH02M1/44
Inventor P·W·理查德S·P·霍泰玲
Owner APPLE INC
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