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OwnerNobutaka Shimizu, Kiminori Yashimainventors
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A superheterodyne receiver apparatus includes a tuning circuit for selecting and receiving a high frequency signal, the 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 includes an electrically rewritable read only memory; a calculation unit for calculating tuning voltage setting data, which are 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.
A superheterodyne receiver apparatus comprising:
A superheterodyne receiving method used for converting a high frequency signal to an intermediate frequency, the superheterodyne receiving method comprising:
A semiconductor integrated circuit for a superheterodyne receiver apparatus that includes a tuning circuit including a voltage-variable capacitance element and an inductance element for selecting high frequency signals and receiving the selected high frequency signals, and plural frequency converting units configured to convert the high frequency signals to intermediate frequency signals, the frequency converting units being integrated, the semiconductor integrated circuit comprising:
Dependencies are inferred from the claim text.