Superheterodyne receiver apparatus and reception method, and semiconductor integrated circuit for receiver apparatus

A receiving device and super-heterodyne technology, which are applied in the adjustment of resonant circuits, parts and electrical components of resonant circuits, etc., can solve the problems of large man-hours and costs for data calculation and storage, and achieve the effect of easy tuning.

Inactive Publication Date: 2012-05-30
MITSUMI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prepare digital data for tuning for all these frequencies and store it in memory, a large-capacity memory is required and costs a lot.
In addition, the man-hours for data calculation and storage are also large

Method used

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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
  • Superheterodyne receiver apparatus and reception method, and semiconductor integrated circuit for receiver apparatus

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Embodiment Construction

[0029] Embodiments of the present invention will be described below with reference to the drawings. figure 1 It is a block diagram showing the configuration of a receiving IC 80 which is an embodiment of the semiconductor integrated circuit for a receiving device of the present invention, and a receiver 10 which is an embodiment of the receiving device of the present invention including the receiving IC 80 .

[0030] The receiver 10 is equipped with a tuning circuit 21 composed of a voltage variable capacitance element and an inductance element for selecting a high-frequency signal, and a frequency conversion unit for converting the frequency of a high-frequency signal (RF signal) into an intermediate frequency signal (IF signal). Superheterodyne receiver (tuner module). The receiving IC 80 , which is a component of the receiver 10 , integrates a frequency changing unit that converts the frequency of a received high frequency signal (RF signal) into an intermediate frequency s...

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Abstract

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.

Description

technical field [0001] The present invention relates to a receiving device and a receiving method for receiving a high-frequency signal by a superheterodyne method, and to a semiconductor integrated circuit for the receiving device. Background technique [0002] When tuning digital data is input to a tuning voltage generating circuit such as a DA converter, an analog voltage corresponding to the input tuning digital data is output. The output analog voltage is supplied as a reverse voltage to the varactor diode of the tuning circuit via a resistor. [0003] A varactor diode is a variable capacitance element whose capacitance value changes according to the reverse voltage. It resonates with an inductor connected in parallel to form a bandpass filter that selects and passes RF signals. [0004] In this manner, in order to accurately control the resonant frequency of the bandpass filter, that is, the tuning frequency of the tuning circuit using the tuning voltage generating ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/26H03J5/02H04B1/10H04B1/18
CPCH04B1/1638H03J3/185H03J3/08H04B1/28H03J1/0033
Inventor 清水信贵八岛公纪
Owner MITSUMI ELECTRIC CO LTD
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