JPS6244533U - - Google Patents

Info

Publication number
JPS6244533U
JPS6244533U JP13590385U JP13590385U JPS6244533U JP S6244533 U JPS6244533 U JP S6244533U JP 13590385 U JP13590385 U JP 13590385U JP 13590385 U JP13590385 U JP 13590385U JP S6244533 U JPS6244533 U JP S6244533U
Authority
JP
Japan
Prior art keywords
tuning
comparator
television
level detection
voltage
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
JP13590385U
Other languages
Japanese (ja)
Other versions
JPH0416500Y2 (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 JP1985135903U priority Critical patent/JPH0416500Y2/ja
Publication of JPS6244533U publication Critical patent/JPS6244533U/ja
Application granted granted Critical
Publication of JPH0416500Y2 publication Critical patent/JPH0416500Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Description

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

第１図ａ，ｂは、自動選局回路において、自動
でチユーニング電圧をアツプさせた時の局近辺で
のＡＦＴ電圧特性図を示す。第１図ｂは、コンパ
レータにヒステリシス特性を持たせた場合である
。第２図は、本考案により構成されたコンパレー
タの実施例を示す回路図である。 １：Ｈｉｇｈレベル検出用コンパレータＯＮレ
ベル、２：Ｌｏｗレベル検出用コンパレータＯＮ
レベル、３：Ｈｉｇｈレベル検出用コンパレータ
ＯＦＦレベル、４：Ｌｏｗレベル検出用コンパレ
ータＯＦＦレベル、５：最適同調点、６：Ｈｉｇ
ｈレベル検出用コンパレータ、７：Ｌｏｗレベル
検出用コンパレータ、８：ノイズマージン、９：
Ｈｉｇｈレベル検出用リフアレンスレベル設定用
抵抗、１０：Ｌｏｗレベル検出用リフアレンスレ
ベル設定用抵抗、１１：Ｈｉｇｈレベル検出用フ
イードバツク抵抗、１２：Ｌｏｗレベル検出用フ
イードバツク抵抗。 FIGS. 1a and 1b show AFT voltage characteristic diagrams near a station when the tuning voltage is automatically increased in an automatic tuning circuit. FIG. 1b shows a case where the comparator is provided with hysteresis characteristics. FIG. 2 is a circuit diagram showing an embodiment of a comparator constructed according to the present invention. 1: High level detection comparator ON level, 2: Low level detection comparator ON level
Level, 3: Comparator OFF level for High level detection, 4: Comparator OFF level for Low level detection, 5: Optimal tuning point, 6: High
Comparator for h level detection, 7: Comparator for low level detection, 8: Noise margin, 9:
Reference level setting resistor for high level detection, 10: Reference level setting resistor for low level detection, 11: Feedback resistor for high level detection, 12: Feedback resistor for low level detection.

Claims (1)

【実用新案登録請求の範囲】 (a) ＡＦＴ電圧、検波出力電圧等の変動を検知
する電圧レベル比較器により同調、非同調を検出
するテレビ、ラジオの同調検出回路において、 (b) 前記電圧レベル比較器にヒステリシス特性
を付加したことを特徴とするテレビ、ラジオ受信
機の同調検出回路。[Scope of Claim for Utility Model Registration] (a) In a tuning detection circuit for a television or radio that detects tuning or out-of-tuning using a voltage level comparator that detects fluctuations in AFT voltage, detection output voltage, etc., (b) The voltage level A tuning detection circuit for television and radio receivers characterized by adding hysteresis characteristics to a comparator.
JP1985135903U 1985-09-05 1985-09-05 Expired JPH0416500Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1985135903U JPH0416500Y2 (en) 1985-09-05 1985-09-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1985135903U JPH0416500Y2 (en) 1985-09-05 1985-09-05

Publications (2)

Publication Number Publication Date
JPS6244533U true JPS6244533U (en) 1987-03-18
JPH0416500Y2 JPH0416500Y2 (en) 1992-04-14

Family

ID=31038529

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1985135903U Expired JPH0416500Y2 (en) 1985-09-05 1985-09-05

Country Status (1)

Country Link
JP (1) JPH0416500Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62136912A (en) * 1985-12-11 1987-06-19 Casio Comput Co Ltd Auto-tuning circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5116905B2 (en) 2010-12-20 2013-01-09 三菱電機株式会社 Switchgear

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55124923U (en) * 1979-02-27 1980-09-04

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55124923U (en) * 1979-02-27 1980-09-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62136912A (en) * 1985-12-11 1987-06-19 Casio Comput Co Ltd Auto-tuning circuit

Also Published As

Publication number Publication date
JPH0416500Y2 (en) 1992-04-14

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