US 11,894,826 B2
Radio-frequency apparatus with multi-band balun and associated methods
Zoltan Vida, Budapest (HU); and Attila L. Zolomy, Budapest (HU)
Assigned to Silicon Laboratories Inc., Austin, TX (US)
Filed by Silicon Laboratories Inc., Austin, TX (US)
Filed on Dec. 18, 2017, as Appl. No. 15/845,327.
Prior Publication US 2019/0190482 A1, Jun. 20, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. H03H 7/42 (2006.01); H03H 11/32 (2006.01); H04B 1/04 (2006.01); H04B 1/18 (2006.01); H03H 7/38 (2006.01)
CPC H03H 7/422 (2013.01) [H03H 7/42 (2013.01); H03H 11/32 (2013.01); H04B 1/04 (2013.01); H04B 1/0458 (2013.01); H04B 1/18 (2013.01); H03D 2200/0023 (2013.01); H03F 2200/06 (2013.01); H03F 2200/294 (2013.01); H03H 2007/386 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a radio-frequency (RF) apparatus; and
a multi-band matching balun coupled to the RF apparatus, the multi-band matching balun including a plurality of capacitors and a plurality of inductors used to realize either an inductor having a frequency-dependent inductance or a capacitor having a frequency-dependent capacitance,
wherein none of the plurality of capacitors and none of the plurality of inductors is variable or tunable.