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SUPERHETERODYNE RECEIVER APPARATUS AND RECEPTION METHOD, AND SEMICONDUCTOR INTEGRATED CIRCUIT FOR RECEIVER APPARATUS
SUPERHETERODYNE RECEIVER APPARATUS AND RECEPTION METHOD, AND SEMICONDUCTOR INTEGRATED CIRCUIT FOR RECEIVER APPARATUS
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机译:超外差接收器和接收方法,以及接收器的半导体集成电路
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摘要
A superheterodyne receiver apparatus comprises: a tuning circuit for selecting and receiving a high frequency signal, said circuit being composed of a voltage-variable capacitance element and an inductance element; and a frequency converting unit for frequency converting the high frequency signal to an intermediate frequency signal. The superheterodyne receiver apparatus further comprises: an electrically rewritable read only memory; a calculation unit for calculating tuning voltage setting data, which used to set the tuning circuit to a tuning voltage corresponding to a desired reception frequency, in accordance with a mathematical expression that uses the data stored in the memory as coefficients; and a D/A conversion unit for D/A converting the tuning voltage setting data to the tuning voltage.
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机译:一种超外差接收机设备,包括:用于选择和接收高频信号的调谐电路,所述电路由电压可变电容元件和电感元件组成;以及频率转换单元,用于将高频信号频率转换为中频信号。超外差接收器设备还包括:电可重写只读存储器;以及计算单元,用于根据使用存储在存储器中的数据作为系数的数学表达式来计算用于将调谐电路设置为与期望的接收频率相对应的调谐电压的调谐电压设置数据; D / A转换单元,用于将调谐电压设定数据D / A转换为调谐电压。
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