Patent ID: 7345503
Filing Date: 2008-03-18
Classification: H03K

Abstract:
1. A method for trimming impedance matching devices in high-speed circuits, the method comprising: determining an electrical parameter associated with a first tantalum nitride (TaN) resistor used as an impedance matching device in the circuit under test; comparing the determined electrical parameter associated with the first TaN resistor to a desired design value of the electrical parameter; altering the resistance value of the first TaN resistor by application of a trimming voltage thereto, wherein the trimming voltage is based on a voltage-resistance characteristic curve of the first TaN resistor; determining whether the altered resistance value of the first TaN resistor causes the electrical parameter to equal the desired design value thereof; and repeating the altering of the resistance value of the first TaN resistor by application of a trimming voltage until the electrical parameter equals the desired design value thereof.