JPS5487413A - Transmitter - Google Patents

Transmitter

Info

Publication number
JPS5487413A
JPS5487413A JP15583677A JP15583677A JPS5487413A JP S5487413 A JPS5487413 A JP S5487413A JP 15583677 A JP15583677 A JP 15583677A JP 15583677 A JP15583677 A JP 15583677A JP S5487413 A JPS5487413 A JP S5487413A
Authority
JP
Japan
Prior art keywords
temperature
thermistor
attenuator
level
resistance value
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
JP15583677A
Other languages
Japanese (ja)
Other versions
JPS5952854B2 (en
Inventor
Koki Terui
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP52155836A priority Critical patent/JPS5952854B2/en
Publication of JPS5487413A publication Critical patent/JPS5487413A/en
Publication of JPS5952854B2 publication Critical patent/JPS5952854B2/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Attenuators (AREA)
  • Amplifiers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Transmitters (AREA)

Abstract

PURPOSE:To compensate temperature characteristics of a transmission level by a thermistor by providing a bias circuit, including the thermistor, to a temperature compensating attenuator with a non-linear element in the intermediate frequency band of the transmitter of a heterodyne repeater. CONSTITUTION:An intermediate frequency signal inputted from terminal 1 is set by temperature compensating attenuator 2 to a level which corresponds to temperature variation and then converted into a microwave by mixer 3. Further, the signal is amplified by amplifier 5 and transmitted from output terminal 6. As a temperature rises, the resistance value of thermistor 13 falls. Consequently, a voltage applied across pin diode 12 as a non-linear element decreases and the resistance value of pin diode 12 itself increases. Therefore, a rise in temperature causes the whole attenuation amount of attenuator 2 to decrease and characteristics of a temperature to the transmission output level of the entire device becomes reverse as compared with those without temperature compensation and kept constant against variation in temperature.
JP52155836A 1977-12-23 1977-12-23 transmitting device Expired JPS5952854B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52155836A JPS5952854B2 (en) 1977-12-23 1977-12-23 transmitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52155836A JPS5952854B2 (en) 1977-12-23 1977-12-23 transmitting device

Publications (2)

Publication Number Publication Date
JPS5487413A true JPS5487413A (en) 1979-07-11
JPS5952854B2 JPS5952854B2 (en) 1984-12-21

Family

ID=15614552

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52155836A Expired JPS5952854B2 (en) 1977-12-23 1977-12-23 transmitting device

Country Status (1)

Country Link
JP (1) JPS5952854B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0390120U (en) * 1989-12-27 1991-09-13
JP2011147167A (en) * 2011-03-14 2011-07-28 Nec Corp Signal processing circuit and signal processing method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5959745U (en) * 1982-10-11 1984-04-19 セイレイ工業株式会社 Rotating structure of chain saw in pruning machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0390120U (en) * 1989-12-27 1991-09-13
JP2011147167A (en) * 2011-03-14 2011-07-28 Nec Corp Signal processing circuit and signal processing method

Also Published As

Publication number Publication date
JPS5952854B2 (en) 1984-12-21

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