JPS54121017A - Reception level comparator device - Google Patents

Reception level comparator device

Info

Publication number
JPS54121017A
JPS54121017A JP2896278A JP2896278A JPS54121017A JP S54121017 A JPS54121017 A JP S54121017A JP 2896278 A JP2896278 A JP 2896278A JP 2896278 A JP2896278 A JP 2896278A JP S54121017 A JPS54121017 A JP S54121017A
Authority
JP
Japan
Prior art keywords
diode
antenna
received
voltage
reception level
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
JP2896278A
Other languages
Japanese (ja)
Other versions
JPS6229936B2 (en
Inventor
Yukitsuna Furuya
Shuji Murakami
Ichiro Takase
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 JP2896278A priority Critical patent/JPS54121017A/en
Publication of JPS54121017A publication Critical patent/JPS54121017A/en
Publication of JPS6229936B2 publication Critical patent/JPS6229936B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0817—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection
    • H04B7/082—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection selecting best antenna path

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To select the antenna featuring the maximum level of the field intensity and received from the slave station by putting the reception level information of the antenna onto a piece of the signal line with no multiplication. CONSTITUTION:The electric wave received through antenna 6 is amplified at amplifier 701 and then filtered through low pass filter 703 after squared via squaring circuit 702 to be supplied to diode 72 (a combined circuit) via current detector 71 (a decision circuit). The wave received at antenna 6' is supplied to diode 72' via the similar processes as stated above. In case the signal received through antenna 6 is stronger than that received through antenna 6', the input voltage of diode 72 becomes higher than the input voltage of diode 72'. And the potential signal line 5 features the value which is lowered by the amount of the combination voltage of diode 72. In this case, the potential difference between the input and the output of diode 72' becomes smaller than the combined voltage, and thus no current flows to diode 72'.
JP2896278A 1978-03-13 1978-03-13 Reception level comparator device Granted JPS54121017A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2896278A JPS54121017A (en) 1978-03-13 1978-03-13 Reception level comparator device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2896278A JPS54121017A (en) 1978-03-13 1978-03-13 Reception level comparator device

Publications (2)

Publication Number Publication Date
JPS54121017A true JPS54121017A (en) 1979-09-19
JPS6229936B2 JPS6229936B2 (en) 1987-06-29

Family

ID=12263031

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2896278A Granted JPS54121017A (en) 1978-03-13 1978-03-13 Reception level comparator device

Country Status (1)

Country Link
JP (1) JPS54121017A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5097304A (en) * 1986-10-07 1992-03-17 Canon Kabushiki Kaisha Image reading device with voltage biases

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5097304A (en) * 1986-10-07 1992-03-17 Canon Kabushiki Kaisha Image reading device with voltage biases

Also Published As

Publication number Publication date
JPS6229936B2 (en) 1987-06-29

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