JPS5647132A - Broad-band receiving circuit - Google Patents

Broad-band receiving circuit

Info

Publication number
JPS5647132A
JPS5647132A JP12298979A JP12298979A JPS5647132A JP S5647132 A JPS5647132 A JP S5647132A JP 12298979 A JP12298979 A JP 12298979A JP 12298979 A JP12298979 A JP 12298979A JP S5647132 A JPS5647132 A JP S5647132A
Authority
JP
Japan
Prior art keywords
band
broad
signal
mixer
uhf
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
JP12298979A
Other languages
Japanese (ja)
Inventor
Mitsuo Saito
Sadahiko Yamashita
Morikazu Sagawa
Hiroshi Onishi
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 JP12298979A priority Critical patent/JPS5647132A/en
Publication of JPS5647132A publication Critical patent/JPS5647132A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/006—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
    • 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
    • H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • 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
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To prevent the generation of cross modulation distortion, etc., generated when a broad-band receiving circuit receives signals of the UHF band and VHF band in common, by providing broad-band amplifiers at the prior stage and post stage of a broad-band variable attenuator. CONSTITUTION:A UHF or VHF signal inputted from terminal 1 is passed through a broad-band amplifier and variable attenuator 2, having the gain and attenuation extent controlled with an AGC voltage from terminal 14, in sequence and further amplified by broad-band amplifier 13 before being supplied to the 1st mixer 4. This mixer 4 is being supplied with an oscillation signal of the 1st local oscillator 5 and the received signal of the UHF or VHF band is frequency-converted into a signal of a band of about 2,500MHz, which is led to the 2nd mixer 7 via BPF6. This mixer 7 is being supplied with a local oscillation signal from the 2nd local oscillator 8 and the UHF or VHF signal having been frequency-converted into about 2,500MHz is further converted into an intermediate frequency signal of about 58, 75MHz, which is amplified by IF amplifier 9 whose output is sent out to terminal 11.
JP12298979A 1979-09-25 1979-09-25 Broad-band receiving circuit Pending JPS5647132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12298979A JPS5647132A (en) 1979-09-25 1979-09-25 Broad-band receiving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12298979A JPS5647132A (en) 1979-09-25 1979-09-25 Broad-band receiving circuit

Publications (1)

Publication Number Publication Date
JPS5647132A true JPS5647132A (en) 1981-04-28

Family

ID=14849527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12298979A Pending JPS5647132A (en) 1979-09-25 1979-09-25 Broad-band receiving circuit

Country Status (1)

Country Link
JP (1) JPS5647132A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01126639U (en) * 1988-02-09 1989-08-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01126639U (en) * 1988-02-09 1989-08-30

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