JPS57184341A - Switching circuit of receiver - Google Patents

Switching circuit of receiver

Info

Publication number
JPS57184341A
JPS57184341A JP56069875A JP6987581A JPS57184341A JP S57184341 A JPS57184341 A JP S57184341A JP 56069875 A JP56069875 A JP 56069875A JP 6987581 A JP6987581 A JP 6987581A JP S57184341 A JPS57184341 A JP S57184341A
Authority
JP
Japan
Prior art keywords
receiver
receivers
output
signal
switch
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
JP56069875A
Other languages
Japanese (ja)
Other versions
JPS6347168B2 (en
Inventor
Akishi Sugimori
Iwao Eguchi
Shigeji Yokoyama
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 JP56069875A priority Critical patent/JPS57184341A/en
Publication of JPS57184341A publication Critical patent/JPS57184341A/en
Publication of JPS6347168B2 publication Critical patent/JPS6347168B2/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)
  • Circuits Of Receivers In General (AREA)
  • Radio Relay Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To prevent the S/N deterioration of an output signal, by turning on and off a switch that gives connection or disconnection to the received signal of a receiver and is provided to each receiver by means of the squelch signal supplied from the receiver. CONSTITUTION:The output of receivers 1 and 2 are fed to a demodulator 3 via analog switches 6 and 8 plus an analog adder 10. The squelch signals of the receivers 1 and 2 are fed to an FF13 and an FF15, and the outputs of the FF13 and FF15 turn on and off the swiches 6 and 9. When the receiver 1 receives electromagnetic waves, the output Q of the FF13 is set at a high level to close the switch 6. In this case, a one-shot circuit 18 resets the FF15 to open the switch 8. When both receivers 1 and 2 receive electromagnetic waves at one time, only the signal of the terminal 5 is delivered to a terminal 11. In case one of the two receivers has a trouble, the squelch signal has no change. Thus the output of the faulty receiver is never delivered to the terminal 11.
JP56069875A 1981-05-08 1981-05-08 Switching circuit of receiver Granted JPS57184341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56069875A JPS57184341A (en) 1981-05-08 1981-05-08 Switching circuit of receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56069875A JPS57184341A (en) 1981-05-08 1981-05-08 Switching circuit of receiver

Publications (2)

Publication Number Publication Date
JPS57184341A true JPS57184341A (en) 1982-11-13
JPS6347168B2 JPS6347168B2 (en) 1988-09-20

Family

ID=13415390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56069875A Granted JPS57184341A (en) 1981-05-08 1981-05-08 Switching circuit of receiver

Country Status (1)

Country Link
JP (1) JPS57184341A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742563A (en) * 1985-06-11 1988-05-03 Nec Corporation System and method for diversity reception of signals
JPH0621566U (en) * 1992-05-07 1994-03-22 眞枝 白石 Cleaning gloves

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742563A (en) * 1985-06-11 1988-05-03 Nec Corporation System and method for diversity reception of signals
JPH0621566U (en) * 1992-05-07 1994-03-22 眞枝 白石 Cleaning gloves

Also Published As

Publication number Publication date
JPS6347168B2 (en) 1988-09-20

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