Patent ID: 8081056

Claim:
A spiral inductor, comprising: a first spiral conductive trace with at least one turn, wherein the first spiral conductive trace comprises an outer end and an inner end; a second spiral conductive trace, comprising a first end and a second end, surrounding a portion of the outermost turn of the first spiral conductive trace, wherein the second spiral conductive trace does not extend into a region surrounded by the first spiral conductive trace and no other spiral conductive trace is formed between the first spiral conductive trace and the second spiral conductive trace; a connector, electrically connecting the inner end and the first end, wherein the first spiral conductive trace, except for the inner end, comprises a substantially uniform width W 1 , and the inner end comprises a width W 2 greater than W 1 and wherein the connector comprises the substantially uniform width W 2 ; a first I/O port, electrically connected to the outer end and extending farther away from the first spiral conductive trace; and a second I/O port, electrically connected to the second end and extending farther away from the second spiral conductive trace, wherein the first I/O port and the second I/O port are between the inner end and first end.