التفاصيل البيبلوغرافية
| العنوان: |
Power supply circuit for producing a reference current with a prescribable temperature dependence |
| Document Number: |
20060125462 |
| تاريخ النشر: |
June 15, 2006 |
| Appl. No: |
11/302228 |
| Application Filed: |
December 14, 2005 |
| مستخلص: |
A power supply circuit is provided for producing a reference current with a prescribable temperature dependence. The circuit includes two current sinks, which at their respective input take up a first input current (I1) or a second input current (I2), and in which current sinks at their respective outputs are connected to a node having a reference potential, the output of at least one current sink being connected via a resistor to the node having the reference potential. The resistor is formed by least two reference resistors with prescribable temperature coefficients that are preferably different from one another. |
| Inventors: |
Eckstein, Wolfgang (Obersulm, DE) |
| Claim: |
1. A power supply circuit for producing a reference current with a prescribable temperature dependence, the power supply circuit comprising: a resistor formed by at least two reference resistors having prescribable temperature coefficients that are different from one another; and two current sinks, which at their respective input have a first input current or a second input current, and in which the current sinks at their respective outputs are connected to a node having a reference potential, the output of at least one current sink being connected via the resistor to the node having the reference potential. |
| Claim: |
2. The power supply circuit according to claim 1, wherein the reference resistors are connected to one another in series. |
| Claim: |
3. The power supply circuit according to claim 1, wherein at least one of the reference resistors is trimmable. |
| Claim: |
4. The power supply circuit according to claim 1, wherein at least one of the reference resistors is a film resistor. |
| Claim: |
5. The power supply circuit according to claim 1, wherein the resistance values and/or the temperature coefficients of the reference resistors can be selected as a function of the temperature coefficients of the power supply circuit components. |
| Claim: |
6. The power supply circuit according to claim 1, wherein the temperature coefficients of the reference resistors have a different sign. |
| Claim: |
7. The power supply circuit according to claim 1, wherein the current sinks are field-effect transistors or bipolar transistors. |
| Claim: |
8. The power supply circuit according to claim 1, wherein the power supply circuit is an integrated circuit. |
| Claim: |
9. The power supply circuit according to claim 1, wherein a current mirror circuit is provided to supply the current sinks with the first input current or the second input current, the first input current being in a prescribable proportionality ratio to the second input current. |
| Current U.S. Class: |
323315/000 |
| Current International Class: |
05 |
| رقم الانضمام: |
edspap.20060125462 |
| قاعدة البيانات: |
USPTO Patent Applications |