JPS5525279A - Automatic frequency tuning defeat device - Google Patents

Automatic frequency tuning defeat device

Info

Publication number
JPS5525279A
JPS5525279A JP9877978A JP9877978A JPS5525279A JP S5525279 A JPS5525279 A JP S5525279A JP 9877978 A JP9877978 A JP 9877978A JP 9877978 A JP9877978 A JP 9877978A JP S5525279 A JPS5525279 A JP S5525279A
Authority
JP
Japan
Prior art keywords
switch
automatic frequency
frequency tuning
terminals
defeat
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.)
Pending
Application number
JP9877978A
Other languages
Japanese (ja)
Inventor
Hiroto Yasumura
Hisao Shiyudo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9877978A priority Critical patent/JPS5525279A/en
Publication of JPS5525279A publication Critical patent/JPS5525279A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To sucure the identical automatic frequency tuning output voltage at both the ON and OFF time of the automatic frequency tuning defeat switch by setting the phase difference to 0 or ±90 degrees between the 1st and 2nd signals by the function of the defeat switch.
CONSTITUTION: The video IF signal is applied to limiter amplifier 20, and the output of amplifier 20 is sent to transformer 25 for the limiter. At the same time, voltage er and es are supplied between terminals P1 and P2 as well as between P3 and P4 of multiplication phase detector 26 respectively. Detector 26 detects the phase shift for the signal to be applied to its input terminal to lead it out to output terminals P5 and P6. Also AFT defeat switch 33 is provided between terminals P3 and P4, and the phase difference between signals es and er is set to 0 or ±90 degrees by the function of switch 33. Thus the identical AFT output voltage can be obtained at the both ON and OFF time of switch 33.
COPYRIGHT: (C)1980,JPO&Japio
JP9877978A 1978-08-14 1978-08-14 Automatic frequency tuning defeat device Pending JPS5525279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9877978A JPS5525279A (en) 1978-08-14 1978-08-14 Automatic frequency tuning defeat device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9877978A JPS5525279A (en) 1978-08-14 1978-08-14 Automatic frequency tuning defeat device

Publications (1)

Publication Number Publication Date
JPS5525279A true JPS5525279A (en) 1980-02-22

Family

ID=14228848

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9877978A Pending JPS5525279A (en) 1978-08-14 1978-08-14 Automatic frequency tuning defeat device

Country Status (1)

Country Link
JP (1) JPS5525279A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5795716A (en) * 1980-12-04 1982-06-14 Fujitsu Ten Ltd Potentiometer preset type electronic tuning receiver
JPS5821099U (en) * 1981-07-28 1983-02-09 太陽鉄工株式会社 circular steel form
JPS59228598A (en) * 1983-06-09 1984-12-21 株式会社金沢製作所 Moving mold apparatus for coating tunnel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5795716A (en) * 1980-12-04 1982-06-14 Fujitsu Ten Ltd Potentiometer preset type electronic tuning receiver
JPS5821099U (en) * 1981-07-28 1983-02-09 太陽鉄工株式会社 circular steel form
JPS59228598A (en) * 1983-06-09 1984-12-21 株式会社金沢製作所 Moving mold apparatus for coating tunnel
JPH0237478B2 (en) * 1983-06-09 1990-08-24 Kanazawa Seisakusho Kk

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