SUPERHETERODYNE RECEIVER APPARATUS, SUPERHETERODYNE RECEIVING METHOD AND SEMICONDUCTOR INTEGRATED CIRCUIT FOR SUPERHETERODYNE RECEIVER APPARATUS

摘要

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.