Decoupling module for decoupling high-frequency signals from a voltage supply line
View Patent ↗A decoupling module for decoupling high-frequency signals from a voltage supply line, the module including a plurality of parallel-connected capacitors (K 1 , K 2 , . . . ), which each have a capacitance (C 1 , C 2 , . . . ), and are characterized in that at least one of the capacitors (K 1 ) has an inductance (L 1 ) which is selected dependent on the capacitance (C 1 ) of the capacitor (K 1 ) and the voltage supply line inductance (L 12 ), so that a resonance is generated which compensates the self-resonance of the system from at least a further capacitor (K 2 , . . . ) and the entire voltage supply line (S). L 12 is the inductance of the voltage supply line running between the parallel-connected capacitors.
1. A decoupling module for decoupling high-frequency signals from a voltage supply line,
the module comprising a plurality of parallel-connected capacitors (K 1 , K 2 , . . . ) which have each capacitance (C 1 , C 2 , . . . );
wherein an inductor (L 12 , L 23 , . . . ) is the inductance of the voltage supply line running between one parallel-connected capacitor, and a next parallel-connected capacitor;
wherein at least one of the capacitors (K 1 , K 2 , . . . ) has a series inductance (L 1 , L 2 , . . . ) which is selected dependent on the capacitance (C 1 , C 2 , . . . ) of the capacitor (K 1 , K 2 , . . . ), and the voltage supply line inductance, so t hat a resonance is generated which compensates self-resonance of the system from at least a further capacitor (K 2 , K 3 , . . . ) and the entire voltage supply line (S).
2. A decoupling module as claimed in claim 1 , characterized in that for at least two of the capacitors (K 1 , K 2 ) the relationship C 1 /C 2 =L 12 /L 1 holds, where L 12 is the inductance of the voltage supply line (S) running between the capacitors (K 1 , K 2 ).
3. A decoupling module as claimed in claim 1 , characterized in that for at least two of the capacitors (K 1 , K 2 ) the relationship C 1 /C 2 =(L 12 −L 2 )/L 1 holds, where C 1 is the capacitance and L 1 the inductance of the capacitor (K 1 ) and C 2 the capacitance and L 2 the inductance of the capacitor (K 2 ) and L 12 is the inductance of the voltage supply line running between the capacitors (K 1 , K 2 ).
4. A decoupling module as claimed in claim 1 , characterized in that the capacitance (C 2 ) of one of the capacitors (K 2 ) having the self-inductance L 2 is chosen such that its self-resonance (f res,2 ) generates a transmission zero-crossing at a further frequency.
5. A decoupling module as claimed in claim 1 , characterized in that the capacitors are thick-film capacitors.
6. A decoupling module as claimed in claim 1 , characterized in that at least one of the capacitors is an SMD capacitor (Surface Mounted Device) having self-inductance.
7. A multilayer stack comprising a decoupling module as claimed in claim 1 , in which at least one layer is a dielectric layer having a relative permitivity ε≧300 on which the capacitors are mounted.
8. A method of providing decoupling of high-frequency signals from a voltage supply line comprising,
coupling a plurality of parallel-connected capacitors (K 1 , K 2 , . . . ) which have each a capacitance (C 1 , C 2 . . . ), wherein an inductor, (L 12 , L 23 . . . ) is the inductance of the voltage supply line running between one parallel-connected capacitor, and a next parallel-connected capacitor, wherein at least one of the capacitors (K 1 , K 2 . . . ) has a series inductance (L 1 , L 2 . . . ) which is selected dependent on the capacitance (C 1 , C 2 . . . ) of the capacitor (K 1 , K 2 . . . ), and the voltage supply line inductance; and, generating a resonance which compensates the self-resonance of the system from at least a further capacitor (K 2 , K 3 . . . ), and from the entire voltage supply line (S).
9. A method, according to claim 8 , w herein for at least two of the capacitors (K 1 , K 2 ) the relationship C 1 /C 2 =L 12 /L 1 holds, where L 12 is the inductance of the voltage supply line (S) running between the capacitors (K 1 , K 2 ).
10. A method, according to claim 8 , wherein for at least two of the capacitors (K 1 , K 2 ) the relationship C 1 /C 2 /=(L 12 −L 2 )/L 1 holds, where C 1 is the capacitance and L 1 the inductance of the capacitor (K 1 ) and C 2 the capacitance and L 2 the inductance of the capacitor (K 2 ) and L 12 is the inductance of the voltage supply line running between the capacitors (K 1 , K 2 ).
11. A method, according to claim 8 , wherein the capacitance (C 2 ), of one of the capacitors (K 2 ) having the self-inductance L 2 , is chosen such that its self-resonance (f res,2 ) generates a transmission zero-crossing at a further frequency.
12. A method, according to claim 8 , wherein the capacitors are thick-film capacitors.
13. A method, according to claim 8 , wherein at least one of the capacitors is an SMD capacitor (Surface Mounted Device) having self-inductance.
14. A method, according to claim 8 , further comprising, providing a multilayer stack in which at least one layer is a dielectric layer having a relative permittivity ε≧300 on which the capacitors are mounted.