| 摘要 |
An error-preventing circuit of a tuner for both digital and analog method is provided to prevent a micro-computer and a digital decoder from simultaneously communicating with a tuner for both digital and analog method, thereby preventing communication error, by using a communication line switch and a switching control signal of the micro-computer. A switching control signal for controlling an operation of a communication line switch is outputted from a micro-computer(2). The switching control signal is outputted such that a communication line of a tuner(1) for both digital and analog method is connected to a communication line of the micro-computer only when the micro-computer needs to communicate with the tuner, and the communication line of the tuner is connected to a communication line of a digital decoder(3) when the micro-computer dose not need to communicate with the tuner.
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