JPS5472913A - Frequency converter for vestigial side-bond amplitude-modulated wave - Google Patents

Frequency converter for vestigial side-bond amplitude-modulated wave

Info

Publication number
JPS5472913A
JPS5472913A JP13981377A JP13981377A JPS5472913A JP S5472913 A JPS5472913 A JP S5472913A JP 13981377 A JP13981377 A JP 13981377A JP 13981377 A JP13981377 A JP 13981377A JP S5472913 A JPS5472913 A JP S5472913A
Authority
JP
Japan
Prior art keywords
amplitude
vestigial side
band
modulated
modulated wave
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
JP13981377A
Other languages
Japanese (ja)
Other versions
JPS6027448B2 (en
Inventor
Yoshihiro Konishi
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.)
Japan Broadcasting Corp
Original Assignee
Nippon Hoso Kyokai NHK
Japan Broadcasting Corp
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 Nippon Hoso Kyokai NHK, Japan Broadcasting Corp filed Critical Nippon Hoso Kyokai NHK
Priority to JP52139813A priority Critical patent/JPS6027448B2/en
Publication of JPS5472913A publication Critical patent/JPS5472913A/en
Publication of JPS6027448B2 publication Critical patent/JPS6027448B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Television Systems (AREA)
  • Amplitude Modulation (AREA)
  • Superheterodyne Receivers (AREA)
  • Transmitters (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

PURPOSE: To obtain a miniature frequency converter for vestigial side-band amplitude-modulated waves such as TV broadcast waves which is able to obtain high- output SHF-band vestigial side band amplitude-modulated waves with its simple- circuit constitution without using a vestigial side-band filter.
CONSTITUTION: A conversion-input vestigial side-band amplitude-modulated wave from input terminal 1 is passed through AGC circuit AGC and amplifier Al to obtain a constant-input-level amplitude modulated wave, which is applied to envelope detectors Ds and Da for symmetrical and asymmetrical components, so that symmetrical-component and asymmetrical component detection outputs Fst and Fat will appear at respective output terminals. Those detection outputs Fst and Fat are applied to modulators Ms and Ma supplied with the output of the oscillator with the 2nd oscillation frequency (fs) to be converted, where the carrier of the frequency of the oscillator is amplitude-modulated by detection output Fst and amplitude-balanicing modulation is also attached by detection output Fat. Then, outputs of both modulators Ms and Ma are mixed by mixer circuit A, so that a vestigial side-band amplitude-modulated wave with the carrier of the 2nd frequency will be outputted.
COPYRIGHT: (C)1979,JPO&Japio
JP52139813A 1977-11-24 1977-11-24 Frequency conversion device for residual sideband amplitude modulated waves Expired JPS6027448B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52139813A JPS6027448B2 (en) 1977-11-24 1977-11-24 Frequency conversion device for residual sideband amplitude modulated waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52139813A JPS6027448B2 (en) 1977-11-24 1977-11-24 Frequency conversion device for residual sideband amplitude modulated waves

Publications (2)

Publication Number Publication Date
JPS5472913A true JPS5472913A (en) 1979-06-11
JPS6027448B2 JPS6027448B2 (en) 1985-06-28

Family

ID=15254037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52139813A Expired JPS6027448B2 (en) 1977-11-24 1977-11-24 Frequency conversion device for residual sideband amplitude modulated waves

Country Status (1)

Country Link
JP (1) JPS6027448B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01117507A (en) * 1987-10-30 1989-05-10 Nec Ic Microcomput Syst Ltd Analog type frequency converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01117507A (en) * 1987-10-30 1989-05-10 Nec Ic Microcomput Syst Ltd Analog type frequency converter

Also Published As

Publication number Publication date
JPS6027448B2 (en) 1985-06-28

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