US 11,658,657 B1
Antenna tuning switch and system with a bypass function integrated in an RFIC
Kun Wang, Hoehenkirchen-Siegertsbrunn (DE)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Feb. 8, 2022, as Appl. No. 17/667,311.
Int. Cl. H03K 17/687 (2006.01); H01Q 1/50 (2006.01)
CPC H03K 17/6871 (2013.01) [H01Q 1/50 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An integrated circuit comprising:
a first stacked transistor switch having a current path coupled between a first tuning element port and a second tuning element port;
a second stacked transistor switch having a current path coupled between the first tuning element port and a ground port; and
a control circuit coupled to a control node of the first stacked transistor switch and coupled to a control node of the second stacked transistor switch, wherein a series on-resistance of the first stacked transistor switch is greater than a series on-resistance of the second stacked transistor, and wherein a series equivalent off-resistance at radio frequency of the first stacked transistor switch is greater than a series equivalent off-resistance at radio frequency of the second stacked transistor switch.