JPH01156631U - - Google Patents

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Publication number
JPH01156631U
JPH01156631U JP5158088U JP5158088U JPH01156631U JP H01156631 U JPH01156631 U JP H01156631U JP 5158088 U JP5158088 U JP 5158088U JP 5158088 U JP5158088 U JP 5158088U JP H01156631 U JPH01156631 U JP H01156631U
Authority
JP
Japan
Prior art keywords
tuning
frequency
data
voltage
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5158088U
Other languages
Japanese (ja)
Other versions
JPH0631779Y2 (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1988051580U priority Critical patent/JPH0631779Y2/en
Publication of JPH01156631U publication Critical patent/JPH01156631U/ja
Application granted granted Critical
Publication of JPH0631779Y2 publication Critical patent/JPH0631779Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Television Receiver Circuits (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

図面はこの考案の一実施例を示すもので、第１
図は回路構成を示すブロツク図、第２図は中間周
波増幅回路による出力信号波形を示す特性図、第
３図はＡＦＣ回路による出力信号波形を示す特性
図、第４図は同じくＡＦＣ回路による出力信号波
形を同期信号の検出可能範囲に対応させて示す特
性図、第５図は第１図のメモリの同調電圧データ
エリアのメモリマツプを示す図、第６図はセツト
キーの操作に対する処理内容を示すフローチヤー
ト、第７図はアツプキーの操作に対する処理内容
を示すフローチヤートである。 １１…アンテナ、１２…高周波増幅回路、１３
…混合回路、１４…中間周波増幅回路、１５…映
像検波回路、１６…局部発振回路、１７…ＡＦＣ
回路、１８…同期分離回路、１９…同調電圧発生
回路、２０…レベル比較器、２１…同期検出回路
、２２…キー入力部、２２ａ…アツプ（ＵＰ）キ
ー、２２ｂ…ダウン（ＤＯＷＮ）キー、２２ｃ…
セツト（ＳＥＴ）キー、２２ｄ…クリア（ＣＬＥ
ＡＲ）キー、２３…チユーニングコントロール回
路、２４…メモリ、２４ａ…同調電圧データエリ
ア、２４ｂ…アドレスデータエリア。 The drawing shows one embodiment of this invention.
Figure 2 is a block diagram showing the circuit configuration, Figure 2 is a characteristic diagram showing the output signal waveform from the intermediate frequency amplifier circuit, Figure 3 is a characteristic diagram showing the output signal waveform from the AFC circuit, and Figure 4 is the output from the AFC circuit as well. A characteristic diagram showing the signal waveform in correspondence with the detectable range of the synchronizing signal, Fig. 5 is a diagram showing a memory map of the tuning voltage data area of the memory in Fig. 1, and Fig. 6 is a flowchart showing the processing contents in response to the operation of the set key. FIG. 7 is a flowchart showing the processing contents for the operation of the Up key. 11... Antenna, 12... High frequency amplification circuit, 13
...Mixing circuit, 14...Intermediate frequency amplification circuit, 15...Video detection circuit, 16...Local oscillation circuit, 17...AFC
Circuit, 18... Synchronization separation circuit, 19... Tuning voltage generation circuit, 20... Level comparator, 21... Synchronization detection circuit, 22... Key input section, 22a... Up (UP) key, 22b... Down (DOWN) key, 22c …
SET key, 22d...Clear (CLE)
AR) key, 23...tuning control circuit, 24...memory, 24a...tuning voltage data area, 24b...address data area.

Claims (1)

【実用新案登録請求の範囲】 複数のチヤンネルに対応した同調電圧を発生し
、この同調電圧に対応した局部発振周波数で同調
選局を行なう電圧シンセサイザ方式の電子選局装
置において、 チヤンネル毎に同期信号を検出し得る周波数範
囲の中心周波数に同調する同調電圧に関するデー
タと、上記同調周波数に対してプラス、マイナス
両方向に一定量周波数をシフトした同調電圧に関
するデータとを発生する発生手段と、 この発生手段による各チヤンネルの同調電圧の
データを組にして記憶する記憶手段と、 各チヤンネルについて中心周波数の同調電圧に
関するデータを上記記憶手段から読出す際に同時
にこれと組にして記憶されるプラス、マイナス両
方向に一定量周波数シフトした同調電圧に関する
データをも共に読出し、局部発振周波数変動によ
る同調ずれを補正する補正手段と を具備したことを特徴とする電子選局装置。[Claim for Utility Model Registration] In a voltage synthesizer type electronic tuning device that generates tuning voltages corresponding to multiple channels and performs tuning at a local oscillation frequency corresponding to the tuning voltages, a synchronization signal for each channel is provided. generating means for generating data regarding a tuning voltage tuned to a center frequency of a frequency range in which the frequency can be detected, and data regarding a tuning voltage whose frequency is shifted by a certain amount in both positive and negative directions with respect to the tuning frequency; storage means for storing data on the tuning voltage of each channel as a set; and data on the tuning voltage at the center frequency for each channel stored in pairs at the same time when the data is read from the storage means in both positive and negative directions. An electronic tuning device characterized by comprising: a correction means for reading out also data regarding a tuning voltage whose frequency is shifted by a certain amount, and correcting a tuning deviation due to local oscillation frequency fluctuations.
JP1988051580U 1988-04-19 1988-04-19 Electronic tuning device Expired - Lifetime JPH0631779Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988051580U JPH0631779Y2 (en) 1988-04-19 1988-04-19 Electronic tuning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988051580U JPH0631779Y2 (en) 1988-04-19 1988-04-19 Electronic tuning device

Publications (2)

Publication Number Publication Date
JPH01156631U true JPH01156631U (en) 1989-10-27
JPH0631779Y2 JPH0631779Y2 (en) 1994-08-22

Family

ID=31277602

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988051580U Expired - Lifetime JPH0631779Y2 (en) 1988-04-19 1988-04-19 Electronic tuning device

Country Status (1)

Country Link
JP (1) JPH0631779Y2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06314957A (en) * 1993-04-05 1994-11-08 Fujitsu Ten Ltd Tuner
JPH088693A (en) * 1993-11-05 1996-01-12 Lg Electron Inc Automatic fine tuning device and its method
WO2001003297A1 (en) * 1999-07-06 2001-01-11 Matsushita Electric Industrial Co., Ltd. Method and apparatus for digital broadcast channel selection

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5534507A (en) * 1978-09-01 1980-03-11 Hitachi Ltd Electronic tuning television picture receiver

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5534507A (en) * 1978-09-01 1980-03-11 Hitachi Ltd Electronic tuning television picture receiver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06314957A (en) * 1993-04-05 1994-11-08 Fujitsu Ten Ltd Tuner
JPH088693A (en) * 1993-11-05 1996-01-12 Lg Electron Inc Automatic fine tuning device and its method
WO2001003297A1 (en) * 1999-07-06 2001-01-11 Matsushita Electric Industrial Co., Ltd. Method and apparatus for digital broadcast channel selection

Also Published As

Publication number Publication date
JPH0631779Y2 (en) 1994-08-22

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