System and method to reduce the bondwire/trace inductance
View Patent ↗A method and system for reducing the inductance on an integrated circuit. The method and system comprises providing a first differential line, including a first input and a first output, the first differential line including at least two bondwire traces which are coupled in parallel. The method and system also comprises providing a second differential line including a second input and a second output, the second differential line including at least two bondwire traces which are coupled in parallel, the first differential line being of opposite polarity to the second differential line. The method and system further comprises cross-coupling of the first input with the second input and the first output with the second output to reduce the inductance caused by bondwire traces. A technique in accordance with the invention uses the coupling factor K to help to further reduce the inductance. By changing the input ordering of differential bondwires/traces, the bondwire/trace magnetic coupling factor K can be used to reduce the line inductance.
1. A method for reducing the inductance on an integrated circuit comprising:
providing a first differential line, including a first input and a first output, the first differential line including at least two bondwire traces which are coupled in parallel,
providing a second differential line including a second input and a second output, the second differential line including at least two bondwire traces which are coupled in parallel, the first differential line being of opposite polarity to the second differential line; and
cross-coupling of the first input with the second input and the first output with the second output to reduce the inductance caused by bondwire traces.
2. The method of claim 1 wherein the first and second inputs are coupled to bondpads on a die and the first and second outputs are coupled to package pins.
3. The method of claim 1 wherein the first and second inputs are coupled to bondpads on a die and the first and second outputs are two pins coupled to an output power matching network.
4. A system comprising:
a first differential line, including a first input and a first output, the first differential line including at least two bondwire traces which are coupled in parallel,
a second differential line including a second input and a second output, the second differential line including at least two bondwire traces which are coupled in parallel, the first differential line being of opposite polarity to the second differential line; wherein the first input is cross-coupled with the second input and the first output is cross-coupled with the second output to reduce the inductance caused by bondwire traces.
5. The system of claim 4 wherein the first and second inputs are coupled to bondpads on a die and the first and second outputs are coupled to package pins.
6. The system of claim 4 wherein the first and second inputs are coupled to bondpads on a die and the first and second outputs are two pins coupled to an output power matching network.