Log in
E-mail
Password
Remember
Forgot password ?
Become a member for free
Sign up
Sign up
Settings
Settings
Dynamic quotes 
OFFON

4-Traders Homepage  >  Equities  >  Nasdaq  >  Apple    AAPL

APPLE (AAPL)
Mes dernières consult.
Most popular
SummaryQuotesChartsNewsAnalysisCalendarCompanyFinancialsConsensusRevisions 
News SummaryMost relevantAll newsSector newsTweets

Apple : Patent Issued for Time-Domain Multiplexing of Power and Data (USPTO 9774207)

share with twitter share with LinkedIn share with facebook
share via e-mail
0
10/05/2017 | 06:58pm CEST

By a News Reporter-Staff News Editor at Journal of Engineering -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Smith, Eric (Palo Alto, CA); Hinch, Bryan R. (Mountain View, CA); So, Tommee (Milpitas, CA), filed on September 15, 2014, was published online on September 26, 2017.

The assignee for this patent, patent number 9774207, is APPLE INC. (Cupertino, CA).

Reporters obtained the following quote from the background information supplied by the inventors: "The number and types of electronic devices available to consumers has increased tremendously the past few years, and that rate of increase shows no signs of abating any time soon. These electronic devices include portable devices, such as laptop, netbook, or tablet computers, cell, media, or smart phones, global positioning devices, media players, and other such devices.

"These portable devices need to be supplied power during operation, and this power may come from external sources or internal sources, such as batteries. These batteries typically need to be charged using an external source, such as a power adapter. These power adapters may receive AC power from a wall outlet, car charger, or other source, and provide DC power that may be used to charge batteries.

"But some devices, such as laptop computers, are very computationally powerful, and therefore require a fair amount of power. Complicating this further is the fact that users of these laptops want to be able to run their laptops for extended periods of time without having to recharge the batteries. Moreover, when a user does connect to a power source to charge the batteries, it is likely the user wants to have the batteries charge very quickly so that the user is free to disconnect from the power source.

"For these reasons, many newer electronic devices have relatively large batteries. Accordingly, it has become desirable to be able to provide large amounts of charging power very quickly.

"But this quick charging is not without its drawbacks. For example, this quick charging may cause high temperatures in a power adapter. To cool the power adapter, the power adapter may need to be made fairly large, such that heat may be dissipated. To avoid this, it may be desirable for an electronic device to control or adjust the power adapter in order to maintain the temperature of the power adapter.

"Thus, what is needed are circuits, methods, and apparatus that allow an electronic device to control a power adapter."

In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "Accordingly, embodiments of the present invention provide circuits, methods, and apparatus that allow an electronic device to control a power adapter. In various embodiments of the present invention, this may allow the electronic device to control the power the electronic device receives.

"An illustrative embodiment of the present invention may provide an electronic system where an electronic device may control a power adapter through a communication channel. That is, the electronic device may control the power adapter by sending data to the power adapter, and receiving data from the power adapter.

"In various embodiments of the present invention, various types of data may be transmitted. This data may include the temperature of the power adapter, the charging capability of the adapter, and other types of data. The electronic device may use this data to adjust the current drawn from the power adapter, and thereby control the power adapter temperature. This may allow the use of smaller, less expensive, power adapters.

"This data may also include a command provided by the electronic device to the power adapter to turn the power adapter off. This is particularly useful when it is more power efficient for a battery in the electronic device to provide power to the electronic device than it is for the electronic device to receive its power from the power adapter.

"In other embodiments of the present invention, other types of data may be transmitted. For example, identification data that includes current and voltage capabilities, adapter identification, or version information may be transmitted. Still other embodiments of the present invention may include fault logging. Faults, such as overheating, overvoltage, or over current faults may be transmitted or stored by either or both the electronic device and the power adapter.

"In some embodiments of the present invention, the electronic device being charged may act as a master device, while the power adapter may act as a slave device. In other embodiments of the present invention, the electronic device being charged may act as a slave device, while the power adapter may act as a master device. In still other embodiments of the present invention, the electronic device and the power adapter may transfer data as peers, that is, in a peer-to-peer configuration.

"In various embodiments of the present invention, data may be transmitted and received over the same two conductors that provide power and ground to the electronic device. In other embodiments of the present invention, one, two, or more than two additional wires may be provided for this communication. Using the same conductors to provide power and data reduces the amount of wires in a cable from the power adapter and allows a cable of a given size to provide a maximum amount of power for its size.

"In embodiments of the present invention where power and data share the same two wires, power and data may be multiplexed in various ways. For example, power and data may be frequency multiplexed. In an illustrative embodiment of the present invention, large filters that may be required for frequency multiplexing are avoided and time division multiplexing may be used. That is, the two wires may convey power and data at different times.

"An illustrative embodiment of the present invention may include circuitry to detect a connection between the electronic device and the power adapter. Once a connection is detected, power may be transferred from the power adapter to the electronic device. This power transfer may be interrupted on occasion to transfer data between the power adapter and the electronic device.

"This detection circuit may include circuits in a power adapter and an electronic device. The power adapter detection circuitry may include a voltage supply coupled to a detect resistor that is in series with a cable conductor. When the cable is connected to the electronic device, a system identification resistor may draw current from the power adapter voltage supply, thereby generating a voltage on the cable conductor. The voltage on the cable conductor may be detected, for example, by using an analog-to-digital converter.

"The value of the voltage on the cable conductor may be used to determine the value of the system resistor, which may indicate information about the electronic device. For example, the voltage may simply indicate that a connection has been made to the electronic device. In other embodiments of the present invention, other information, such as the type of electronic device, the charge or voltage that may be accepted by the electronic device, or other aspect of the electronic device may be conveyed by the value of system resistor and resultant voltage on the cable conductor.

"In other embodiments of the present invention, other detect circuitry may be employed by the power adapter. For example, in a specific embodiment of the present invention, a second resistor may be switched in parallel (or series) with the detect resistor in the power adapter. This second resistor may be switched in and a second resultant voltage on the cable conductor measured. This technique may provide two voltages that can be subtracted from each other to generate a differential measurement. This differential measurement may have a reduced sensitivity to component leakage, diode drops, and other circuit effects. In other embodiments of the present invention, the voltage supply used during detection may be varied.

"In still other embodiments of the present invention, other system identification circuitry may be employed by the electronic device. In a specific embodiment of the present invention, a first resistor in parallel with a series combination of a second resistor and a diode may be used. When a low voltage is received at the electronic device, the diode may be off, and the load may appear to be the first resistor. This resistor may be used to indicate that a connection to an electronic device has been made by the power adapter. As the received voltage is increased, the diode may turn on, and the load may appear to be (approximately) the first and second resistors in parallel. The inclusion of this second resistor may be used to verify the connection. In other embodiments of the present invention, the value of the second resistor may convey other information about the electronic device, as described above.

"In another specific embodiment of the present invention, a first resistor in parallel with a diode may be used. When a high voltage is received at the electronic device, the diode may clamp the voltage. As the received voltage is lowered, the diode may turn off, and the load may appear as the first resistor. Again, this two-step process may be used to verify a connection between a power adapter and an electronic device. In other embodiments the present invention, the first resistor value may convey other information about the electronic device, as described above.

"These power adapters typically are connected through a cable to a connector insert. This connector insert may have a first form factor. On occasion, it may be desirable to connect such a power adapter to a legacy or other electronic device that may house a connector receptacle arranged to accept connector inserts having a second form factor. Accordingly, embodiments of the present invention may provide a converter or connector adapter having a connector receptacle to accept a connector insert having the first form factor. The converter may further include a connector insert having the second form factor. This connector adapter may further include circuitry such that the adapter may be detected by a power adapter. This connector adapter may include circuitry to provide a power connection from its connector receptacle to its connector insert. In a specific embodiment of the present invention, a resistor may be coupled between the connector receptacle and connector insert. A switch, such as a field effect transistor, may be coupled across the resistor and controlled by control circuitry. The resistor may have a value that is detected by power adapter, which may identify the resistor be a value associated with a converter or connector adapter. After detection, as power is applied by the power adapter, control circuitry may activate the switch, thereby shorting the resistor and providing power through the converter to the electronic device.

"Various embodiments of the present invention may incorporate one or more of these and the other features described herein. A better understanding of the nature and advantages of the present invention may be gained by reference to the following detailed description and the accompanying drawings."

For more information, see this patent: Smith, Eric; Hinch, Bryan R.; So, Tommee. Time-Domain Multiplexing of Power and Data. U.S. Patent Number 9774207, filed September 15, 2014, and published online on September 26, 2017. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9774207.PN.&OS=PN/9774207RS=PN/9774207

Keywords for this news article include: APPLE INC.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2017, NewsRx LLC

(c) 2017 NewsRx LLC, source Science Newsletters

share with twitter share with LinkedIn share with facebook
share via e-mail
0
Latest news on APPLE
01:04a PayPal tops profit estimates, lifts target on mobile payments growth
01:04a PayPal tops profit estimates, lifts target on mobile payments growth
12:55a APPLE'S RETAIL CHIEF ON CHICAGO STOR : 'We are the live version of Apple Music'
10/19 APPLE : Patent Issued for Efficient Creation of Documents (USPTO 9785617)
10/19 APPLE : Patent Issued for Audio Amplifier Circuit Having Inputs for Three Audio ..
10/19 APPLE : Patent Issued for Laser Welding of Transparent and Opaque Materials (USP..
10/19 APPLE : Patent Issued for Acoustic Testing of Sapphire Components for Electronic..
10/19 APPLE : Patent Issued for Dome Switch Stack and Method for Making the Same (USPT..
10/19 COMING SOON : a selfie with your credit card application
10/19 Microsoft expands rural U.S. campaign with Green Bay Packers tie-up
More news
News from SeekingAlpha
10/19 AT&T : Negativity Is Misplaced, This Is A Buying Opportunity
10/19 THE FEDERAL RESERVE HAS NEVER PRINTE : Part II
10/19 Apple drops on iPhone 8 sales speculation
10/19 WSJ : Apple Watch loses cellular service in China
10/19 J&J : Unattractive
Financials ($)
Sales 2017 228 B
EBIT 2017 60 760 M
Net income 2017 47 367 M
Finance 2017 157 B
Yield 2017 1,48%
P/E ratio 2017 17,73
P/E ratio 2018 14,54
EV / Sales 2017 2,94x
EV / Sales 2018 2,43x
Capitalization 825 B
Chart APPLE
Duration : Period :
Apple Technical Analysis Chart | AAPL | US0378331005 | 4-Traders
Technical analysis trends APPLE
Short TermMid-TermLong Term
TrendsNeutralNeutralBullish
Income Statement Evolution
Consensus
Sell
Buy
Mean consensus OUTPERFORM
Number of Analysts 38
Average target price 173 $
Spread / Average Target 8,3%
EPS Revisions
Managers
NameTitle
Timothy Donald Cook Chief Executive Officer & Director
Arthur D. Levinson Chairman
Jeffrey E. Williams Chief Operating Officer
Luca Maestri Chief Financial Officer, SVP & VP-Human Resources
Kevin M. Lynch Vice President-Technology
Sector and Competitors
1st jan.Capitalization (M$)
APPLE37.94%825 197
HP INC46.36%36 278
HEWLETT PACKARD ENTERPRISE CO-15.37%23 806
SEAGATE TECHNOLOGY PLC-10.24%9 861
PEGATRON CORPORATION--.--%7 002
LENOVO GROUP LIMITED-5.30%6 402