MY120737A - High- frequency electronic device - Google Patents

High- frequency electronic device

Info

Publication number
MY120737A
MY120737A MYPI98001822A MYPI9801822A MY120737A MY 120737 A MY120737 A MY 120737A MY PI98001822 A MYPI98001822 A MY PI98001822A MY PI9801822 A MYPI9801822 A MY PI9801822A MY 120737 A MY120737 A MY 120737A
Authority
MY
Malaysia
Prior art keywords
frequency
mixer
television signal
electronic device
frequency unit
Prior art date
Application number
MYPI98001822A
Inventor
Masahiko Saitou
Michinori Sasaki
Original Assignee
Alps 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 Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Publication of MY120737A publication Critical patent/MY120737A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/4446—IF amplifier circuits specially adapted for B&W TV
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver
    • H04N5/7755—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver the recorder being connected to, or coupled with, the antenna of the television receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Superheterodyne Receivers (AREA)
  • Noise Elimination (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

DESCRIBED HEREIN IS A HIGH-FREQUENCY ELECTRONIC DEVICE (1). THE HIGH-FREQUENCY ELECTRONIC DEVICE (1) HAS A MODULATION PART (4) HAVING AN OSCILLATOR, AND A TUNER PART (5) HAVING A HIGH-FREQUENCY UNIT (11) FOR SELECTING A TELEVISION SIGNAL TO BE RECEIVED AND OUTPUTTING IT THEREFROM, A MIXER (12) FOR EFFECTING FREQUENCY CONVERSION ON THE SELECTED TELEVISION SIGNAL OUTPUTTED FROM THE HIGH-FREQUENCY UNIT (11) AND A LOCAL OSCILLATOR (13) FOR INPUTTING A LOCAL OSCILLATION SIGNAL TO THE MIXER (12). THE HIGH-FREQUENCY UNIT (11) HAS AN INTERSTAGE TUNING CIRCUIT (22) FOR INPUTTING THE SELECTED TELEVISION SIGNAL TO THE MIXER (12). A LOW-PASS FILTER (18) IS ELECTRICALLY CONNECTED BETWEEN THE INTERSTAGE TUNING CIRCUIT (22) AND THE MIXER (12) SO THAT A CUT-OFF FREQUENCY OF THE LOW-PASS FILTER (18) IS SET HIGHER THAN THE MAXIMUM FREQUENCY OF THE TELEVISION SIGNAL RECEIVED BY THE HIGH-FREQUENCY UNIT (11). OWING TO THE ABOVE CONSTRUCTION, INTEFERENCE SIGNALS IS DEVELOPED BY AN OSCILLATION SIGNAL PRODUCED FROM THE TUNER PART AT THE TIME THAT THE MODULATION PART AND THE TUNER PART ARE ACTIVATED SIMULTANEOUSLY, CAN BE CONTROLLED LOW IN LEVEL SO AS TO IMPROVE THE QUALITY OF AN IMAGE.(FIG. 1)
MYPI98001822A 1997-04-25 1998-04-23 High- frequency electronic device MY120737A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10984697A JP3573591B2 (en) 1997-04-25 1997-04-25 High frequency electronic equipment

Publications (1)

Publication Number Publication Date
MY120737A true MY120737A (en) 2005-11-30

Family

ID=14520685

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI98001822A MY120737A (en) 1997-04-25 1998-04-23 High- frequency electronic device

Country Status (5)

Country Link
JP (1) JP3573591B2 (en)
KR (1) KR100247832B1 (en)
CN (1) CN1090843C (en)
GB (1) GB2324665B (en)
MY (1) MY120737A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2798545A1 (en) * 1999-09-14 2001-03-16 Koninkl Philips Electronics Nv DEMODULATION PROCESS PRESERVING HIGH SPECTRAL PURITY
JP2003060998A (en) * 2001-08-21 2003-02-28 Mitsumi Electric Co Ltd Rf modulator
CN102545959B (en) * 2012-02-09 2014-03-12 成都中亚通茂科技有限公司 Multi-frequency-point broadband signal generator and signal processing method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5456522U (en) * 1977-09-28 1979-04-19
US4894720A (en) * 1987-07-31 1990-01-16 Sanyo Electric Co., Ltd. Circuit for selectively outputting high frequency signals
JP2661499B2 (en) * 1993-03-08 1997-10-08 関西日本電気株式会社 Tuner unit

Also Published As

Publication number Publication date
KR19980081684A (en) 1998-11-25
GB9807410D0 (en) 1998-06-03
GB2324665B (en) 2001-01-03
JP3573591B2 (en) 2004-10-06
CN1198617A (en) 1998-11-11
JPH10303766A (en) 1998-11-13
GB2324665A (en) 1998-10-28
CN1090843C (en) 2002-09-11
KR100247832B1 (en) 2000-03-15

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