US 12,224,785 B2
Tuner IC
Toshihiro Yamaguchi, Atsugi (JP); and Hiroshi Shono, Atsugi (JP)
Assigned to Sony Semiconductor Solutions Corporation, Atsugi (JP)
Appl. No. 17/628,130
Filed by Sony Semiconductor Solutions Corporation, Atsugi (JP)
PCT Filed Aug. 6, 2020, PCT No. PCT/JP2020/030116
§ 371(c)(1), (2) Date Jan. 18, 2022,
PCT Pub. No. WO2021/033554, PCT Pub. Date Feb. 25, 2021.
Claims priority of application No. 2019-149766 (JP), filed on Aug. 19, 2019.
Prior Publication US 2022/0263530 A1, Aug. 18, 2022
Int. Cl. H04B 1/10 (2006.01); H04B 7/185 (2006.01); H04N 21/426 (2011.01); H04N 21/438 (2011.01)
CPC H04B 1/1036 (2013.01) [H04B 7/18526 (2013.01); H04B 7/18539 (2013.01); H04N 21/426 (2013.01); H04N 21/4382 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A tuner integrated circuit (IC) comprising:
an intermediate frequency (IF) output terminal configured to output an IF signal that is an output signal of terrestrial broadcasting;
a first output terminal configured to output the IF signal or one of baseband (BB) signals that are output signals of satellite digital broadcasting and have orthogonal phases;
a second output terminal configured to output another of the BB signals;
a first switch configured to switch an output destination of the IF signal to the first output terminal or the IF output terminal;
a second switch configured to switch an output format of the output signal of the terrestrial broadcasting to the IF signal or the BB signals;
a dummy switch provided at a preceding stage of the second output terminal; and
a control circuit configured to control switching of the first switch according to both a first control signal that controls switching to the terrestrial broadcasting or the satellite digital broadcasting and a second control signal that controls switching of the output destination to the first output terminal or the IF output terminal, the first control signal being set at a time of channel selection, the second control signal being initially set.