APPARATUS FOR COMPENSATING FOR TEMPERATURE AND METHOD THEREFOR

• US 20160209861A1
• Filed: 01/08/2016
• Published: 07/21/2016
• Est. Priority Date: 01/21/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Dae-Hyun Kwon, Jae-Won Choi, Seong-Sik Myoung
• Inventors: Choi, Jae-Won, Lee, Jong-Soo, Kwon, Dae-Hyun, Quang Diep, Bui, Myoung, Seong-Sik, Lee, Jae-Hun
• Granted Patent: US 9,846,446 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G05F 1/462 as a function of the requirements of the load, e.g. delay, temperature, specific voltage/current characteristic
• CPC Class Codes: G05F 1/567 for temperature compensation
• CPC Class Codes: G05F 3/242 with compensation for device parameters, e.g. channel width modulation, threshold voltage, processing, or external variations, e.g. temperature, loading, supply voltage
• CPC Class Codes: G05F 3/245 producing a voltage or current as a predetermined function of the temperature
• CPC Class Codes: G05F 3/267 using both bipolar and field-effect technology

Abstract

Disclosed are a temperature compensation apparatus and method. The apparatus includes a reference signal generator that supplies at least one of a first current which is constant regardless of temperature variation and a second current which is proportional to temperature variation, a slope amplifier that determines a first output current having a second temperature coefficient which is a multiple of a first temperature coefficient of the second current, based on the first current and the second current, and a slope controller that determines a second output current having a third temperature coefficient, using a weighted average of the first current and the second current.

Claims

1. An apparatus for compensating for temperature, the apparatus comprising:

a reference signal generator that supplies at least one of a first current which is constant regardless of temperature variation and a second current which is proportional to the temperature variation;

a slope amplifier that determines a first output current having a second temperature coefficient, which is a multiple of a first temperature coefficient of the second current, based on the first current and the second current; and

a slope controller that determines a second output current having a third temperature coefficient, using a weighted average of the first current and the second current.

2. The apparatus of claim 1, wherein the slope amplifier comprises at least one Temperature Coefficient DouBLe (TCDBL) that increases a size of the second current by n times and increases a size of the first current by n−

1 times, and reduces the second current by n−

1 times the size of the first current and generates the first output current.

3. The apparatus of claim 2, wherein the slope amplifier further comprises a current mirror that copies the first output current.

4. The apparatus of claim 1, wherein the slope controller further increases the first current by a parameter α

and increases the second current by 1−

α

, and adds the first current to the second current.

5. The apparatus of claim 1, wherein the slope controller comprises:

a first current mirror that mirrors the first current which has been increased by a parameter α

;

a second current mirror that mirrors the second current which has been increased by 1−

α

; and

a third current mirror that mirrors a current obtained by adding the first current which has been increased by a to the second current which has been increased by 1−

α

.

6. The apparatus of claim 1, further comprising a bias distributor that supplies at least one bias current to at least one other apparatus than the apparatus, using the first output current and the second output current.

7. The apparatus of claim 6, wherein the bias distributor comprises:

a first input unit that mirrors the first input current; and

a first output unit that mirrors the first output current and generates at least one third output current

8. The apparatus of claim 6, comprising:

a second input unit that mirrors the second input current; and

a second output unit that mirrors the second output current and generates at least one fourth output current

9. The apparatus of claim 1, wherein the reference signal generator comprises:

a Band Gap Reference (BGR) that generates the first current; and

a Proportional To an Absolute Temperature (PTAT) circuit that generates the second current.

10. A method for compensating for temperature in a device, the method comprising:

supplying at least one of a first current which is constant regardless of temperature variation and a second current which is proportional to the temperature variation;

determining a first output current having a second temperature coefficient which is a multiple of a first temperature coefficient of the second current, based on the first current and the second current; and

determining a second output current having a third temperature coefficient, using a weighted average of the first current and the second current.

11. The method of claim 10, wherein determining the first output current comprises:

increasing a size of the second current by n times and increasing a size of the first current by n−

1 times; and

reducing the second current, which has been increased by n times, by the size of the first current, which has been increased by n−

1 times, and generating the first output current.

12. The method of claim 10, wherein determining the second output current comprises:

increasing the first current by a parameter α and

increasing the second current by 1−

α

; and

adding the first current, which has been increased by α

, to the second current, which has been increased by 1−

α

.

13. The method of claim 10, further comprising supplying at least one bias current to at least one other device than the device, using at least one of the first output current and the second output current.

14. The method of claim 13, wherein supplying at least one bias current comprises mirroring the first output current and generating at least one third output current

15. The method of claim 13, wherein supplying at least one bias current comprises mirroring the second output current and generating at least one fourth output current

16. A method by a temperature compensation apparatus, comprising:

generating a first reference signal and a second reference signal;

determining a first output current, based on the first reference signal and the second reference signal;

determining a second output current, based on the first reference signal and the second reference signal; and

supplying a bias to a corresponding apparatus, using the first output current and the second output current.

17. The method of claim 16, wherein the first output current is determined by a difference between twice the second reference signal and once the first reference signal.

18. The method of claim 16, wherein the second output current is determined through a weighted average of the first reference signal and the second reference signal.

19. The method of claim 18, wherein the weighted average is determined by a sum of the first reference signal multiplied by a constant and the second reference signal multiplied by one minus the constant.

20. The method of claim 16, wherein the apparatus supplies the bias to the corresponding apparatus by distributing the first output current or the second output current to the corresponding apparatus, or by distributing a third output current obtained by multiplying the first output current and the second output current by parameters, to the corresponding apparatus.