JPS6135434U - Digital tuning circuit - Google Patents
Digital tuning circuitInfo
- Publication number
- JPS6135434U JPS6135434U JP11965284U JP11965284U JPS6135434U JP S6135434 U JPS6135434 U JP S6135434U JP 11965284 U JP11965284 U JP 11965284U JP 11965284 U JP11965284 U JP 11965284U JP S6135434 U JPS6135434 U JP S6135434U
- Authority
- JP
- Japan
- Prior art keywords
- tuning
- frequency
- signal
- circuit
- control circuit
- 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
Links
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図面は本考案の一実施例を示すもので、第１図はパネル
型テレビジョン受像機の外観構成図、第２図はテレビジ
ョン受像機の全体の回路構成を示すブロック図、第３図
は周波数検出回路の構成を示すブロック図、第４図は第
３図の周波数休出回路の動作を説明するためのタイミン
グチャート、第５図は制御回路の詳細を示すブロック図
、第６図は第５図における同調電圧カウンタの詳細を示
す回路構成図、第７図は第５図におけるデジタルチュー
ニング制御回路部分の詳細を示すブロック図、第８図ａ
， ｂは同調電圧カウンタをアップ／ダウンさせた場合
のチューニング電圧の変化を示す図である。
１１・・・ケース、１２・・・映像表示部、１３・・・
チヤンネル表示部、１４・・・音量表示部、１５・・・
表示パネル、１６ａ・・・チューニング用のアップキー
、１６ｂ・・・ダウンキー、１７ａ・・・音量調整用の
アツプキー、１７ｂ・・・ダウンキー、１８・・・オー
ト／マニュアル切換スイッチ、１９・−ＶＨＦ ／ＵＨ
Ｆ 切換スイツチ、２０・・・電源スイッチ、２１・・
・アンテナ、２２・・・電子同調チューナ、２３・・・
テレビリニア回路、２４・・・Ａ／Ｄ変換回路、２５・
・・液晶駆動回路、２６・・・周波数検出回路、２７・
・・制御回路、２８・・・キー人力部、２９・・・チュ
ーナ同調電圧制御回路、２６１・・・周波数弁別器、２
６２，’２６３・・・コンパレータ、２６４，２６５・
・・基準電源、２７ｊ，・・・基準クロツク発生回路、
２７２・・・キー制御回路、２７３・・・デジタルチュ
ーニング制御回路、２７４・・・同期検出回路、２７５
・・・同調電圧カウンタ、２７６・・・′メモリ、２７
７・・・変調波作成回路、２７８・・・音量表示回路／
チャンネル表示回路、２・７９・・・表示制御用回路、
２７１０・・・４ビットカウンタ、２７１１・・・Ｄ／
Ａ変換回路、６７・・・ＡＦＴカウンタ、７９・・・デ
コーダ、８４・・・６４進カウンタ。The drawings show one embodiment of the present invention; FIG. 1 is an external configuration diagram of a panel type television receiver, FIG. 2 is a block diagram showing the overall circuit configuration of the television receiver, and FIG. 3 is a block diagram showing the overall circuit configuration of the television receiver. FIG. 4 is a block diagram showing the configuration of the frequency detection circuit, FIG. 4 is a timing chart for explaining the operation of the frequency rest circuit in FIG. 3, FIG. 5 is a block diagram showing details of the control circuit, and FIG. FIG. 5 is a circuit configuration diagram showing details of the tuning voltage counter; FIG. 7 is a block diagram showing details of the digital tuning control circuit portion in FIG. 5; FIG. 8a
, b are diagrams showing changes in the tuning voltage when the tuning voltage counter is turned up/down. 11... Case, 12... Video display section, 13...
Channel display section, 14...Volume display section, 15...
Display panel, 16a...Up key for tuning, 16b...Down key, 17a...Up key for volume adjustment, 17b...Down key, 18...Auto/manual changeover switch, 19.- VHF/UH
F Selector switch, 20...Power switch, 21...
・Antenna, 22... Electronic tuning tuner, 23...
TV linear circuit, 24...A/D conversion circuit, 25.
...Liquid crystal drive circuit, 26...Frequency detection circuit, 27.
... Control circuit, 28 ... Key human power section, 29 ... Tuner tuning voltage control circuit, 261 ... Frequency discriminator, 2
62,'263... Comparator, 264,265.
...Reference power supply, 27j, ...Reference clock generation circuit,
272...Key control circuit, 273...Digital tuning control circuit, 274...Synchronization detection circuit, 275
... Tuning voltage counter, 276...'Memory, 27
7...Modulated wave creation circuit, 278...Volume display circuit/
Channel display circuit, 2.79...display control circuit,
2710...4-bit counter, 2711...D/
A conversion circuit, 67...AFT counter, 79...decoder, 84...64-decimal counter.
Claims (1)
信号の周波数を弁別し、その入力周波数と設定周波数と
の周波数差に応じて弁別信号を出力する周波数弁別器と
、この周波数弁別器から出力される弁別信号を検出して
上記一子同調チューナに対するチューニング制御信号を
出力するチューニング制御回路と、チューニング時上記
チューニング制御信号が急激に変化する予め設定したチ
ューニング周波数近傍において、上記周波数弁別器から
チューニング制御回路へ入力される弁別信号をマスクす
る手段とを具備したことを特徴とするデジタルチューニ
ング回路。An electronic tuning tuner, a frequency discriminator that discriminates the frequency of a signal received by the electronic tuning tuner and outputs a discrimination signal according to the frequency difference between the input frequency and a set frequency, and a discrimination output from the frequency discriminator. a tuning control circuit that detects a signal and outputs a tuning control signal to the one-child tuning tuner; and a tuning control circuit that detects a signal and outputs a tuning control signal to the one-child tuning tuner, and a tuning control circuit that outputs a tuning control signal from the frequency discriminator to the tuning control circuit when the tuning control signal changes rapidly near a preset tuning frequency during tuning. A digital tuning circuit comprising means for masking an input discrimination signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984119652U JPH066620Y2 (en) | 1984-08-03 | 1984-08-03 | Digital tuning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984119652U JPH066620Y2 (en) | 1984-08-03 | 1984-08-03 | Digital tuning circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6135434U true JPS6135434U (en) | 1986-03-04 |
| JPH066620Y2 JPH066620Y2 (en) | 1994-02-16 |
Family
ID=30678521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984119652U Expired - Lifetime JPH066620Y2 (en) | 1984-08-03 | 1984-08-03 | Digital tuning circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH066620Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63179092U (en) * | 1987-05-12 | 1988-11-18 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55118216A (en) * | 1979-03-05 | 1980-09-11 | Sanyo Electric Co Ltd | Digital preset tuner |
-
1984
- 1984-08-03 JP JP1984119652U patent/JPH066620Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55118216A (en) * | 1979-03-05 | 1980-09-11 | Sanyo Electric Co Ltd | Digital preset tuner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63179092U (en) * | 1987-05-12 | 1988-11-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH066620Y2 (en) | 1994-02-16 |
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