JPS5488710A - Individual limiter system - Google Patents

Individual limiter system

Info

Publication number
JPS5488710A
JPS5488710A JP15686577A JP15686577A JPS5488710A JP S5488710 A JPS5488710 A JP S5488710A JP 15686577 A JP15686577 A JP 15686577A JP 15686577 A JP15686577 A JP 15686577A JP S5488710 A JPS5488710 A JP S5488710A
Authority
JP
Japan
Prior art keywords
frequency
hef
lef
band block
limiters
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
JP15686577A
Other languages
Japanese (ja)
Other versions
JPS5731831B2 (en
Inventor
Takashi Usami
Kensaku Fujii
Takeo Koinuma
Kazuo Saito
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.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP15686577A priority Critical patent/JPS5488710A/en
Publication of JPS5488710A publication Critical patent/JPS5488710A/en
Publication of JPS5731831B2 publication Critical patent/JPS5731831B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To increase the margin against noise, by constituting the multi-frequency receiver through the use of filter in less quantity of hardware, by providing the individual limiter different in the limit level every frequency, at the post stage of the band block filter. CONSTITUTION:At the post stage of the band block filters HEF and LEF, limiters L1LM, L2LM, L3LM, L4LM for low group and limiters H1LM, H2LM, H3LM, H4LM for high group which are different only from the limit level every frequency, are provided. Even if simple filters in which uncertain region of the level performance is several dB are used for HEF and LEF, the guarantee of the ripple in the pass band width of the band block filter can be made every frequency. Thus, HEF and LEF are provided in less amount of hard-ware and multi-frequency receiver is constituted, allowing to increase the margin against noise.
JP15686577A 1977-12-26 1977-12-26 Individual limiter system Granted JPS5488710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15686577A JPS5488710A (en) 1977-12-26 1977-12-26 Individual limiter system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15686577A JPS5488710A (en) 1977-12-26 1977-12-26 Individual limiter system

Publications (2)

Publication Number Publication Date
JPS5488710A true JPS5488710A (en) 1979-07-14
JPS5731831B2 JPS5731831B2 (en) 1982-07-07

Family

ID=15637071

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15686577A Granted JPS5488710A (en) 1977-12-26 1977-12-26 Individual limiter system

Country Status (1)

Country Link
JP (1) JPS5488710A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63129604A (en) * 1986-11-20 1988-06-02 Fujitsu Ltd High-frequency choke

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5031705A (en) * 1973-07-23 1975-03-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5031705A (en) * 1973-07-23 1975-03-28

Also Published As

Publication number Publication date
JPS5731831B2 (en) 1982-07-07

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