ELECTRONIC COMPONENT AND APPARATUS INCLUDING THE SAME

• US 20160043570A1
• Filed: 08/07/2015
• Published: 02/11/2016
• Est. Priority Date: 08/08/2014
• Status: Active Grant

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Jeong, In Wha, Kim, Hugh, Park, Jong Heum
• Granted Patent: US 9,973,041 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01G 4/258 Temperature compensation means
• CPC Class Codes: H01G 4/40 Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations
• CPC Class Codes: H01G 7/04 having a dielectric selected for the variation of its permittivity with applied temperature
• CPC Class Codes: H02J 50/12 of the resonant type

Abstract

An electronic component includes a first capacitor including a first dielectric material having a permittivity that is inversely proportional to temperature; and a second capacitor connected in parallel with the first capacitor and including a second dielectric material having a permittivity that is directly proportional to temperature.

Claims

1. An electronic component comprising:

a first capacitor comprising a first dielectric material having a permittivity that is inversely proportional to temperature; and

a second capacitor connected in series with the first capacitor and comprising a second dielectric material having a permittivity that is directly proportional to temperature.

2. The electronic component of claim 1, wherein a variation in a capacitance of the first capacitor according to a unit change in temperature and a variation in a capacitance of the second capacitor according to a unit change in temperature are substantially equal in magnitude but opposite in sign at a same temperature.

3. The electronic component of claim 1, wherein the first capacitor and the second capacitor comprise:

a ceramic body;

a first external electrode and a second external electrode respectively disposed on opposing end portions of the ceramic body in a first direction; and

first, second, third and fourth internal electrodes disposed in the ceramic body and extending in the first direction and stacked in a second direction intersecting the first direction;

wherein the first and third internal electrodes are connected to the first external electrode;

the second and fourth internal electrodes are connected to the second external electrode;

the first dielectric material is disposed in the ceramic body between the first and second internal electrodes;

the second dielectric material is disposed in the ceramic body between the third and fourth internal electrodes;

the first and second internal electrodes and the first dielectric material constitute the first capacitor; and

the third and fourth internal electrodes and the second dielectric material constitute the second capacitor.

4. The electronic component of claim 3, wherein the first and second internal electrodes are disposed in one portion of the ceramic body in the second direction;

and

the third and fourth internal electrodes are disposed in another portion of the ceramic body in the second direction.

5. The electronic component of claim 3, wherein each of the first, second, third, and fourth internal electrodes is provided in plural.

6. An apparatus comprising:

an electronic component comprising;

a first capacitor comprising a first dielectric material having a permittivity that is inversely proportional to temperature; and

a second capacitor connected in parallel with the first capacitor and comprising a second dielectric material having a permittivity that is directly proportional to temperature; and

a coil connected to the electronic component.

7. The apparatus of claim 6, further comprising a power supply configured to supply alternating current (AC) power to the electronic component and the coil to cause the coil to transmit the supplied AC power wirelessly.

8. The apparatus of claim 7, wherein the power supply comprises:

a controller configured to output a control signal;

a power source configured to convert input power into supply power and output the supply power; and

a switching circuit configured to convert the supply power into the AC power in response to the control signal and output the AC power to the electronic component and the coil.

9. The apparatus of claim 8, wherein the switching circuit comprises a switch configured to be turned on and off by the control signal at a switching frequency equal or substantially equal to a resonant frequency determined by the electronic component and the coil.

10. The apparatus of claim 7, wherein a variation in a capacitance of the first capacitor according to a unit change in temperature and a variation in a capacitance of the second capacitor according to a unit change in temperature are substantially equal in magnitude but opposite in sign at a same temperature.

11. The apparatus of claim 7, wherein the first capacitor and the second capacitor comprise:

a ceramic body;

a first external electrode and a second external electrode respectively disposed on opposing end portions of the ceramic body in a first direction; and

first, second, third and fourth internal electrodes disposed in the ceramic body and extending in the first direction and stacked in a second direction intersecting the first direction;

wherein the first and third internal electrodes are connected to the first external electrode;

the second and fourth internal electrodes are connected to the second external electrode;

the first dielectric material is disposed in the ceramic body between the first and second internal electrodes;

the second dielectric material is disposed in the ceramic body between the third and fourth internal electrodes;

the first and second internal electrodes and the first dielectric material constitute the first capacitor; and

the third and fourth internal electrodes and the second dielectric material constitute the second capacitor.

12. The apparatus of claim 6, wherein the coil is configured to receive power wirelessly;

the apparatus further comprises a rectifier configured to rectify the power received by the coil to output an output voltage; and

the electronic component comprises;

a first capacitor comprising a first dielectric material having a permittivity that is inversely proportional to temperature; and

a second capacitor connected in parallel with the first capacitor and comprising a second dielectric material having a permittivity that is directly proportional to temperature.

13. The apparatus of claim 12, wherein the apparatus further comprises a printed circuit board (PCB) comprising a first area in which the coil is disposed, and a second area in which the rectifier and the electronic component are disposed.

14. The apparatus of claim 12, wherein the apparatus further comprises a printed circuit board (PCB) comprising a first area in which the coil is disposed, and a second area in which the rectifier is disposed;

and

the first capacitor and the second capacitor are embedded within the PCB.

15. The apparatus of claim 12, wherein a variation in a capacitance of the first capacitor according to a unit change in temperature and a variation in a capacitance of the second capacitor according to a unit change in temperature are substantially equal in magnitude but opposite in sign at a same temperature.

16. The apparatus of claim 12, wherein the first capacitor and the second capacitor comprise:

a ceramic body;

a first external electrode and a second external electrode respectively disposed on opposing end portions of the ceramic body in a first direction; and

first, second, third and fourth internal electrodes disposed in the ceramic body and extending in the first direction and stacked in a second direction intersecting the first direction;

wherein the first and third internal electrodes are connected to the first external electrode;

the second and fourth internal electrodes are connected to the second external electrode;

the first dielectric material is disposed in the ceramic body between the first and second internal electrodes;

the second dielectric material is disposed in the ceramic body between the third and fourth internal electrodes;

the first and second internal electrodes and the first dielectric material constitute the first capacitor; and

the third and fourth internal electrodes and the second dielectric material constitute the second capacitor.

17. An apparatus comprising:

an electronic component comprising;

a first element having a characteristic that changes with temperature; and

a second element connected to the first element and having a characteristic that changes with temperature in a direction that is opposite to a direction in which the characteristic of the first element changes with temperature; and

a coil connected to the electronic component and forming a resonant circuit with the electronic component.

18. The apparatus of claim 17, wherein the first element is a first capacitor having a permittivity that is inversely proportional to temperature;

and

the second element is a second capacitor connected in parallel with the first capacitor and having a permittivity that is directly proportional to temperature.

19. The apparatus of claim 17, wherein the first element is a capacitor having a permittivity that is inversely proportional to temperature, and the second element is an inductor connected in series with the capacitor and having an inductance that is directly proportional to temperature;

or

the first element is a capacitor having a permittivity that is directly proportional to temperature, and the second element is an inductor connected in series with the capacitor and having an inductance that is inversely proportional to temperature.

20. The apparatus of claim 17, wherein the first element is a capacitor having a permittivity that changes with temperature;

the second element is a variable inductor connected in series with the capacitor and having an inductance that changes in response to a control signal; and

the apparatus further comprises a controller configured to output a control signal to change the inductance of the variable inductor so that the inductance of the variable inductor changes with temperature in a direction that is opposite to a direction in which the permittivity of the capacitor changes with temperature.