| 摘要 |
A tuner circuit and a method of designing a tuner circuit for removing a buffer circuit for video drive for increasing drive current capacitance added to an output terminal is provided, unlike a buffer for small-current drive installed in a tuner circuit. The method of designing a tuner circuit has a buffer installed in an integrated circuit (IC) of small-current drive in a video output terminal, and includes an RF converting portion, a tuning portion and a demodulation portion, in which a video output signal of the buffer in IC is input to an input circuit for processing a signal without an external buffer for drive, and the amount of attenuation of a signal at high frequency due to small drive current is measured to improve a frequency characteristic of a video signal in the tuner circuit in proportion to the amount of attenuation. Thus, an additional buffer for drive is not required, so that the number of devices is reduced, to thereby lower the material costs. |
