| 摘要 |
A television tuner module (1) includes a television-signal receiving circuit (2), a digital demodulator IC (3), and a backend IC (4) that functions as an MPEG decoder and that has a function of controlling digital reception. Between the television-signal receiving circuit (2) and the digital demodulator IC (3), a bus switch (5) that performs switching between a digital-reception control line and an analog-reception control line is provided. A set-side microcomputer (21) is connected to the bus switch (5) via an analog-reception control bus (10). An N-channel enhancement MOSFET (11) is provided on the analog-reception control bus (10), which becomes open as viewed from the set side when a module-side power supply is turned off. |
