System and method for managing electromagnetic interference for electronic devices

• US 10,459,874 B2
• Filed: 05/18/2016
• Issued: 10/29/2019
• Est. Priority Date: 05/18/2016
• Status: Active Grant

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Joseph, Binu Ariyappallil, Graves, Jamie Lane, Olson, Thomas Brian
• Primary Examiner(s): Bae, Ji H
• Application Number:
  US15/158,495
• Publication Number:
  US 20170339098A1
• Time in Patent Office: 1,259 Days
• Field of Search: 713 1, 713500, 713600
• CPC Class Codes: G06F 1/08 Clock generators with changeable or programmable clock frequency
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: G06F 15/02 manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
• CPC Class Codes: G06F 9/4403 Processor initialisation
• CPC Class Codes: G06F 9/44505 Configuring for program initiating, e.g. using registry, configuration files
• CPC Class Codes: H02J 2310/22 The load being a portable electronic device
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0036 using connection detecting circuits H02J7/0034 takes precedence
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: H02M 1/44 Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• CPC Class Codes: H04L 61/35 involving non-standard use of addresses for implementing network functionalities, e.g. coding subscription information within the address or functional addressing, i.e. assigning an address to a function

Abstract

According to an embodiments, a system and method for managing electromagnetic interference in an electronic charging unit is disclosed. The operating frequencies of multiple electronic devices interfacing with the electronic charging unit may be dynamically altered to manage electromagnetic interference from each electronic device such that the aggregated electromagnetic interference from all electronic devices remains within predetermined limits.

Claims

1. A method comprising:

detecting a contact of a device with a charging unit;

selecting a frequency by randomly selecting an operating frequency or by selecting a frequency associated with a network address; and

using the selected frequency as the operating frequency for the device.

2. The method of claim 1, wherein the selecting the frequency comprising:

determining whether the device has an assigned network address;

selecting a predetermined frequency associated with the assigned network address from a plurality of predetermined frequencies, if the device has the assigned network address; and

selecting one of the plurality of predetermined frequencies at random, if the device does not have the assigned network address.

3. The method of claim 1, wherein the selecting the frequency comprising:

receiving a network address from the charging unit; and

selecting a predetermined frequency associated with the network address from a plurality of predetermined frequencies.

4. The method of claim 1, wherein selecting a frequency associated with a network address includes a check for a new dynamically assigned network address.

5. The method of claim 1, wherein the using the selected frequency further comprising:

using the selected frequency as clock frequency for the device.

6. The method of claim 1, wherein the charging unit is one or more of

a power charging unit, and

a computing unit.

7. The method of claim 1, wherein the device is a handheld calculator.

8. A device comprising:

a processing unit; and

a storage unit coupled to the processing unit, wherein the processing unit is configured to;

detect a contact of the device with a charging unit,

select a frequency when the contact of the device with the charging unit is detected by randomly selecting en operating frequency or by selecting a frequency associated with a network address, and

use the selected frequency as the operating frequency for the device when the contact of the device with the charging unit is detected.

9. The device of claim 8, wherein the processing unit is further configured to:

determine whether the device has an assigned network address;

select a predetermined frequency associated with the assigned network address from a plurality of predetermined frequencies, if the device has the assigned network address; and

select one of the plurality of predetermined frequencies at random, if the device does not have the assigned network address.

10. The device of claim 8, wherein the processing unit is further configured to

receive a network address from the charging unit;

and

select a predetermined frequency associated with the network address from a plurality of predetermined frequencies.

11. The device of claim 8, wherein the processing unit is further configured to

select a default frequency for the device when the contact of the device with the charging unit is not detected, wherein the default frequency is default operating frequency of the device.

12. The device of claim 8, further comprising:

a clock generator coupled to the processing unit, wherein the processing unit is further configured to

change a frequency of the clock generator to the selected frequency.

13. The device of claim 8, wherein the charging unit is one or more of

a power charging unit, and

a computing unit.

14. The device of claim 8, wherein the device is a handheld calculator.

15. A handheld calculator comprising:

a processing unit;

a storage unit coupled to the processing unit; and

a clock generator coupled to the processing unit, wherein the processing unit is configured to;

detect a contact of the handheld calculator with a charging unit,

select a frequency when the contact of the handheld calculator with the charging unit is detected by randomly selecting an operating frequency or by selecting a frequency associated with a network address, and

change a frequency of the clock generator to the selected frequency when the contact of the handheld calculator with the charging unit is detected.

16. The handheld calculator of claim 15, wherein the processing unit is further configured to:

determine whether the handheld calculator has an assigned network address;

select a predetermined frequency associated with the assigned network address from a plurality of predetermined frequencies, if the handheld calculator has the assigned network address; and

select one of the plurality of predetermined frequencies at random, if the handheld calculator does not have the assigned network address.

17. The handheld calculator of claim 15, wherein the processing unit is further configured to

select a default frequency for the handheld calculator, wherein the default frequency is default operating frequency of the handheld calculator.

18. The handheld calculator of claim 15, wherein the charging unit is one or more of

a power charging unit, and

a computing unit.

19. A handheld calculator comprising:

a processing unit;

a storage unit coupled to the processing unit; and

a clock generator coupled to the processing unit, wherein the processing unit is configured to;

detect a contact of the handheld calculator with a charging unit,

receive a network address from the charging unit; and

select a predetermined frequency associated with the network address from a plurality of predetermined frequencies.