Patent ID: 9660606
Date: 2017-05-23
CPC Classifications: H01F,H01L,H03F,H03H,Y10T

Claim:
1. An impedance matching device for a radio-frequency (RF) power amplifier (PA), the device comprising: a primary metal trace having one or more turns between a first end and a second end, the first end of the primary metal trace configured to be capable of being connected to a voltage source for the PA, the second end of the primary metal trace configured to be capable of being connected to an output of the PA; a secondary metal trace having one or more turns between a first end and a second end, the first end of the secondary metal trace connected to the second end of the primary metal trace, the second end of the secondary metal trace configured to be capable of being connected to an output node, the primary metal trace and the secondary metal trace being in respective planes separated by a distance and being in an autotransformer configuration; and a capacitance implemented between the first and second ends of the first metal trace to be electrically parallel with the first metal trace, the capacitance configured to substantially resonate out magnetizing inductance of the autotransformer.