JPS5723331A - Radio equipment - Google Patents

Radio equipment

Info

Publication number
JPS5723331A
JPS5723331A JP9836780A JP9836780A JPS5723331A JP S5723331 A JPS5723331 A JP S5723331A JP 9836780 A JP9836780 A JP 9836780A JP 9836780 A JP9836780 A JP 9836780A JP S5723331 A JPS5723331 A JP S5723331A
Authority
JP
Japan
Prior art keywords
band
unnecessary
output
comparator
gain
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
JP9836780A
Other languages
Japanese (ja)
Inventor
Sumio Endo
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 JP9836780A priority Critical patent/JPS5723331A/en
Publication of JPS5723331A publication Critical patent/JPS5723331A/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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion

Landscapes

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

Abstract

PURPOSE:To prevent radiation of an unnecessary band, by controlling the gain of an amplifier in a transmission outputting circuit in accordance with an output of a band pass filter. CONSTITUTION:In an unnecessary RF input signal, since its frequency gets out of a passing band of a band pass filter 8, an output of a detector 9 is decreased. Accordingly, when decision voltage of a comparator 10 is varied, a desired frequency band is determined freely. As a result, a switching circuit 11 is operated by an output signal of the comparator 10, the gain of high-frequency amplifying circuit 3 is controlled, and it is operated so that an unnecessary radiation is obstructed.
JP9836780A 1980-07-17 1980-07-17 Radio equipment Pending JPS5723331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9836780A JPS5723331A (en) 1980-07-17 1980-07-17 Radio equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9836780A JPS5723331A (en) 1980-07-17 1980-07-17 Radio equipment

Publications (1)

Publication Number Publication Date
JPS5723331A true JPS5723331A (en) 1982-02-06

Family

ID=14217902

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9836780A Pending JPS5723331A (en) 1980-07-17 1980-07-17 Radio equipment

Country Status (1)

Country Link
JP (1) JPS5723331A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08288864A (en) * 1995-04-18 1996-11-01 Nec Corp Transmission circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08288864A (en) * 1995-04-18 1996-11-01 Nec Corp Transmission circuit

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