JPS5537049A - Automatic selecting trigger circuit - Google Patents

Automatic selecting trigger circuit

Info

Publication number
JPS5537049A
JPS5537049A JP11014678A JP11014678A JPS5537049A JP S5537049 A JPS5537049 A JP S5537049A JP 11014678 A JP11014678 A JP 11014678A JP 11014678 A JP11014678 A JP 11014678A JP S5537049 A JPS5537049 A JP S5537049A
Authority
JP
Japan
Prior art keywords
frequency
trigger
amplifier
output
trigger 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
Application number
JP11014678A
Other languages
Japanese (ja)
Other versions
JPS5821449B2 (en
Inventor
Fumio Kosuge
Shoji Ominato
Hideo Shibuya
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11014678A priority Critical patent/JPS5821449B2/en
Publication of JPS5537049A publication Critical patent/JPS5537049A/en
Publication of JPS5821449B2 publication Critical patent/JPS5821449B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/18—Automatic scanning over a band of frequencies
    • H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To obtain a normal trigger signal even when the channel separation is 1/2 of a predetermined value by shifting the center frequency of the IF selective circuit of the trigger circuit 12.5kHz in either direction from IF frequency. CONSTITUTION:Output of IF amplifier 11 (for example, 10.7MHz) is added to the trigger amplifier 12, while the base signal source output (11.52MHz) is added to the amplifier 12, subjected to mixing by means of the mixer 121 and converted into the signal of 820kHz. The synchrobnizing frequency with the above is amplified by the 12.5kHz shifted amplifying portion 12, detected by the wave detector 14 to obtain the trigger output. Thus, the receiver frequency of PLL synthesizer is retained at 50kHz spacing and can automatically select the frequency of odd number times of 25kHz.
JP11014678A 1978-09-06 1978-09-06 Automatic tuning trigger circuit Expired JPS5821449B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11014678A JPS5821449B2 (en) 1978-09-06 1978-09-06 Automatic tuning trigger circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11014678A JPS5821449B2 (en) 1978-09-06 1978-09-06 Automatic tuning trigger circuit

Publications (2)

Publication Number Publication Date
JPS5537049A true JPS5537049A (en) 1980-03-14
JPS5821449B2 JPS5821449B2 (en) 1983-04-30

Family

ID=14528202

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11014678A Expired JPS5821449B2 (en) 1978-09-06 1978-09-06 Automatic tuning trigger circuit

Country Status (1)

Country Link
JP (1) JPS5821449B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6054124A (en) * 1983-09-02 1985-03-28 株式会社日立製作所 Vacuum cutter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6054124A (en) * 1983-09-02 1985-03-28 株式会社日立製作所 Vacuum cutter

Also Published As

Publication number Publication date
JPS5821449B2 (en) 1983-04-30

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