Patent ID: 8222917

Claim:
An adjustable impedance matching circuit, comprising: a nonvolatile reprogrammable resistance device having a plurality of phase change devices (PCD), wherein each of said plurality of PCDs includes a first electrical conductive terminal, a second electrical conductive terminal, a phase change material (PCM) element, a heating element, a program control terminal, wherein said heating element is in thermal and electrical contact with said PCM, said program control terminal configured to provide a first electrical current to said first electrical conductive terminal passing through said heating element for controlling resistance of said PCM, wherein said first electrical conductive terminal and said second electrical conductive terminal are coupled via said PCM element which facilitates a passage of a second electrical current traveling from said first electrical conductive terminal to said second electrical conductive terminal in accordance with resistance of said PCM element, wherein resistance of each PCM element varies in response to temperature of said heating element; and a control circuit coupled to said nonvolatile reprogrammable resistance device and configured to generate control signals used to program said nonvolatile reprogrammable resistance device.