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JPS55132126A - Selective switching circuit of signal transmission line - Google Patents

Selective switching circuit of signal transmission line

Info

Publication number
JPS55132126A
JPS55132126A JP3902079A JP3902079A JPS55132126A JP S55132126 A JPS55132126 A JP S55132126A JP 3902079 A JP3902079 A JP 3902079A JP 3902079 A JP3902079 A JP 3902079A JP S55132126 A JPS55132126 A JP S55132126A
Authority
JP
Japan
Prior art keywords
impedance
terminating
sw1a
transmission line
signal source
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
JP3902079A
Other languages
Japanese (ja)
Inventor
Toshio Ikeda
Yuzo Fujii
Tetsuo Murase
Koichi Shimoi
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
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3902079A priority Critical patent/JPS55132126A/en
Publication of JPS55132126A publication Critical patent/JPS55132126A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/40—Artificial lines; Networks simulating a line of certain length

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To make it possible to select a transmission line without exerting an influence on a signal source, etc., by terminating a nonselective signal by impedance equal to a terminating impedance value all the time in simple circuit constitution including a switching method and amplifier. CONSTITUTION:The 1st route among input routes is provided with switching methode SW1A connected to a signal source and to the 2nd route, the other switching method SW1B and amplifier AMP are cascaded; and AMP is so composed of operational amplifier OPA with series resistance element Rz and feedback resistance Rf that its input impedance will be queal to terminating impedance Z0 and the input of AMP will be set out of phase with its output. Therefore, method SW1A is opened after the selection to close method SW1B, and the terminating impedance viewed from the signal source becomes equal to impedance Z0 while a leaking signal having passed through method SW1A and OPA is canceled at the output side of mixer MIX.
JP3902079A 1979-03-31 1979-03-31 Selective switching circuit of signal transmission line Pending JPS55132126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3902079A JPS55132126A (en) 1979-03-31 1979-03-31 Selective switching circuit of signal transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3902079A JPS55132126A (en) 1979-03-31 1979-03-31 Selective switching circuit of signal transmission line

Publications (1)

Publication Number Publication Date
JPS55132126A true JPS55132126A (en) 1980-10-14

Family

ID=12541415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3902079A Pending JPS55132126A (en) 1979-03-31 1979-03-31 Selective switching circuit of signal transmission line

Country Status (1)

Country Link
JP (1) JPS55132126A (en)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8001579B2 (en) 2008-10-16 2011-08-16 John Mezzalingua Associates, Inc. Downstream output level and/or output level tilt compensation device between CATV distribution system and CATV user
US8082570B2 (en) 2009-03-30 2011-12-20 John Mezzalingua Associates, Inc. Method and apparatus for a self-terminating signal path
US8098113B2 (en) 2009-05-29 2012-01-17 John Mezzalingua Associates, Inc. Self-terminating coaxial cable port
US8141122B2 (en) 2009-03-30 2012-03-20 John Mezzalingua Associates, Inc. RF terminate/permit system
US8181211B2 (en) 2009-03-30 2012-05-15 John Mezzalingua Associates, Inc. Total bandwidth conditioning device
US8179814B2 (en) 2009-03-30 2012-05-15 John Mezzalingua Associates, Inc. Automatic return path switching for a signal conditioning device
US8213457B2 (en) 2009-10-09 2012-07-03 John Mezzalingua Associates, Inc. Upstream bandwidth conditioning device
US8274566B2 (en) 2009-10-09 2012-09-25 John Mezzalingua Associates, Inc. Modulation analyzer and level measurement device
US8286209B2 (en) 2008-10-21 2012-10-09 John Mezzalingua Associates, Inc. Multi-port entry adapter, hub and method for interfacing a CATV network and a MoCA network
US8356322B2 (en) 2009-09-21 2013-01-15 John Mezzalingua Associates, Inc. Passive multi-port entry adapter and method for preserving downstream CATV signal strength within in-home network
US8385219B2 (en) 2009-10-09 2013-02-26 John Mezzalingua Associates, Inc. Upstream bandwidth level measurement device
US8429695B2 (en) 2008-10-21 2013-04-23 Ppc Broadband, Inc. CATV entry adapter and method utilizing directional couplers for MoCA signal communication
US8464301B2 (en) 2008-10-16 2013-06-11 Ppc Broadband, Inc. Upstream bandwidth conditioning device between CATV distribution system and CATV user
US8516537B2 (en) 2009-10-09 2013-08-20 Ppc Broadband, Inc. Downstream bandwidth conditioning device
US8584192B2 (en) 2009-03-30 2013-11-12 Ppc Broadband, Inc. Upstream bandwidth conditioning device
US8990881B2 (en) 2009-03-30 2015-03-24 Ppc Broadband, Inc. Upstream bandwidth conditioning device
US9264012B2 (en) 2012-06-25 2016-02-16 Ppc Broadband, Inc. Radio frequency signal splitter
US9271026B2 (en) 2008-10-16 2016-02-23 Ppc Broadband, Inc. Dynamically configurable frequency band selection device between CATV distribution system and CATV user
US9306530B2 (en) 2010-02-01 2016-04-05 Ppc Broadband, Inc. Multipath mitigation circuit for home network
US9351051B2 (en) 2008-10-13 2016-05-24 Ppc Broadband, Inc. CATV entry adapter and method for distributing CATV and in-home entertainment signals
US9363469B2 (en) 2008-07-17 2016-06-07 Ppc Broadband, Inc. Passive-active terminal adapter and method having automatic return loss control
US9647851B2 (en) 2008-10-13 2017-05-09 Ppc Broadband, Inc. Ingress noise inhibiting network interface device and method for cable television networks
US10021343B2 (en) 2010-12-21 2018-07-10 Ppc Broadband, Inc. Method and apparatus for reducing isolation in a home network
US10142677B2 (en) 2008-10-21 2018-11-27 Ppc Broadband, Inc. Entry device for a CATV network
US10212392B2 (en) 2016-06-30 2019-02-19 Ppc Broadband, Inc. Passive enhanced MoCA entry device
US11076191B2 (en) 2018-01-19 2021-07-27 Ppc Broadband, Inc. Systems and methods for extending an in-home splitter network
US11910052B2 (en) 2008-10-21 2024-02-20 Ppc Broadband, Inc. Entry device for communicating external network signals and in-home network signals

Cited By (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9363469B2 (en) 2008-07-17 2016-06-07 Ppc Broadband, Inc. Passive-active terminal adapter and method having automatic return loss control
US10257462B2 (en) 2008-07-17 2019-04-09 Ppc Broadband, Inc. Adapter for a cable-television network
US9769418B2 (en) 2008-07-17 2017-09-19 Ppc Broadband, Inc. Passive-active terminal adapter and method having automatic return loss control
US9351051B2 (en) 2008-10-13 2016-05-24 Ppc Broadband, Inc. CATV entry adapter and method for distributing CATV and in-home entertainment signals
US9781472B2 (en) 2008-10-13 2017-10-03 Ppc Broadband, Inc. CATV entry adapter and method for distributing CATV and in-home entertainment signals
US10187673B2 (en) 2008-10-13 2019-01-22 Ppc Broadband, Inc. Ingress noise inhibiting network interface device and method for cable television networks
US9647851B2 (en) 2008-10-13 2017-05-09 Ppc Broadband, Inc. Ingress noise inhibiting network interface device and method for cable television networks
US10154302B2 (en) 2008-10-13 2018-12-11 Ppc Broadband, Inc. CATV entry adapter and method for distributing CATV and in-home entertainment signals
US10045056B2 (en) 2008-10-13 2018-08-07 Ppc Broadband, Inc. Ingress noise inhibiting network interface device and method for cable television networks
US10264325B2 (en) 2008-10-16 2019-04-16 Ppc Broadband, Inc. System, method and device having teaching and commerce subsystems
US9271026B2 (en) 2008-10-16 2016-02-23 Ppc Broadband, Inc. Dynamically configurable frequency band selection device between CATV distribution system and CATV user
US8001579B2 (en) 2008-10-16 2011-08-16 John Mezzalingua Associates, Inc. Downstream output level and/or output level tilt compensation device between CATV distribution system and CATV user
US10924811B2 (en) 2008-10-16 2021-02-16 Ppc Broadband, Inc. Compensation device for maintaining a desired signal quality in transmitted signals
US8464301B2 (en) 2008-10-16 2013-06-11 Ppc Broadband, Inc. Upstream bandwidth conditioning device between CATV distribution system and CATV user
US10149004B2 (en) 2008-10-21 2018-12-04 Ppc Broadband, Inc. Entry device and method for communicating CATV signals and MoCA in-home network signals in an entry device
US8286209B2 (en) 2008-10-21 2012-10-09 John Mezzalingua Associates, Inc. Multi-port entry adapter, hub and method for interfacing a CATV network and a MoCA network
US11910052B2 (en) 2008-10-21 2024-02-20 Ppc Broadband, Inc. Entry device for communicating external network signals and in-home network signals
US8429695B2 (en) 2008-10-21 2013-04-23 Ppc Broadband, Inc. CATV entry adapter and method utilizing directional couplers for MoCA signal communication
US10284903B2 (en) 2008-10-21 2019-05-07 Ppc Broadband, Inc. Entry adapters for frequency band blocking internal network signals
US10154303B2 (en) 2008-10-21 2018-12-11 Ppc Broadband, Inc. Entry adapter that blocks different frequency bands and preserves downstream signal strength
US10284904B2 (en) 2008-10-21 2019-05-07 Ppc Broadband, Inc. Entry adapters for conducting can signals and in-home network signals
US10917685B2 (en) 2008-10-21 2021-02-09 Ppc Broadband, Inc. Entry device for communicating signals between an external network and an in-home network
US10154304B2 (en) 2008-10-21 2018-12-11 Ppc Broadband, Inc. Methods for controlling CATV signal communication between a CATV network and an in-home network, and preserving downstream CATV signal strength within the in-home network
US10341718B2 (en) 2008-10-21 2019-07-02 Ppc Broadband, Inc. Passive multi-port entry adapter and method for preserving downstream CATV signal strength within in-home network
US10341719B2 (en) 2008-10-21 2019-07-02 Ppc Broadband, Inc. Entry adapter for communicating external signals to an internal network and communicating client signals in the client network
US10419813B2 (en) 2008-10-21 2019-09-17 Ppc Broadband, Inc. Passive multi-port entry adapter for preserving downstream CATV signal strength
US11528526B2 (en) 2008-10-21 2022-12-13 Ppc Broadband, Inc. Entry device for communicating external network signals and in-home network signals
US10142677B2 (en) 2008-10-21 2018-11-27 Ppc Broadband, Inc. Entry device for a CATV network
US8990881B2 (en) 2009-03-30 2015-03-24 Ppc Broadband, Inc. Upstream bandwidth conditioning device
US8584192B2 (en) 2009-03-30 2013-11-12 Ppc Broadband, Inc. Upstream bandwidth conditioning device
US8082570B2 (en) 2009-03-30 2011-12-20 John Mezzalingua Associates, Inc. Method and apparatus for a self-terminating signal path
US8141122B2 (en) 2009-03-30 2012-03-20 John Mezzalingua Associates, Inc. RF terminate/permit system
US8181211B2 (en) 2009-03-30 2012-05-15 John Mezzalingua Associates, Inc. Total bandwidth conditioning device
US8179814B2 (en) 2009-03-30 2012-05-15 John Mezzalingua Associates, Inc. Automatic return path switching for a signal conditioning device
US8098113B2 (en) 2009-05-29 2012-01-17 John Mezzalingua Associates, Inc. Self-terminating coaxial cable port
US8356322B2 (en) 2009-09-21 2013-01-15 John Mezzalingua Associates, Inc. Passive multi-port entry adapter and method for preserving downstream CATV signal strength within in-home network
US9860591B2 (en) 2009-09-21 2018-01-02 Ppc Broadband, Inc. Passive multi-port entry adapter and method for preserving downstream CATV signal strength within in-home network
US9167286B2 (en) 2009-09-21 2015-10-20 Ppc Broadband, Inc. Passive multi-port entry adapter and method for preserving downstream CATV signal strength within in-home network
US9516376B2 (en) 2009-09-21 2016-12-06 Ppc Broadband, Inc. Passive multi-port entry adapter and method for preserving downstream CATV signal strength within in-home network
US8274566B2 (en) 2009-10-09 2012-09-25 John Mezzalingua Associates, Inc. Modulation analyzer and level measurement device
US8516537B2 (en) 2009-10-09 2013-08-20 Ppc Broadband, Inc. Downstream bandwidth conditioning device
US8385219B2 (en) 2009-10-09 2013-02-26 John Mezzalingua Associates, Inc. Upstream bandwidth level measurement device
US8213457B2 (en) 2009-10-09 2012-07-03 John Mezzalingua Associates, Inc. Upstream bandwidth conditioning device
US10790793B2 (en) 2010-02-01 2020-09-29 Ppc Broadband, Inc. Filter circuit
US11444592B2 (en) 2010-02-01 2022-09-13 Ppc Broadband, Inc. Filter circuit
US10284162B2 (en) 2010-02-01 2019-05-07 Ppc Broadband, Inc. Multipath mitigation circuit for home network
US9979373B2 (en) 2010-02-01 2018-05-22 Ppc Broadband, Inc. Multipath mitigation circuit for home network
US9306530B2 (en) 2010-02-01 2016-04-05 Ppc Broadband, Inc. Multipath mitigation circuit for home network
US10021343B2 (en) 2010-12-21 2018-07-10 Ppc Broadband, Inc. Method and apparatus for reducing isolation in a home network
US10750120B2 (en) 2010-12-21 2020-08-18 Ppc Broadband, Inc. Method and apparatus for reducing isolation in a home network
US11070766B2 (en) 2010-12-21 2021-07-20 Ppc Broadband, Inc. Method and apparatus for reducing isolation in a home network
US9641147B2 (en) 2012-06-25 2017-05-02 Ppc Broadband, Inc. Radio frequency signal splitter
US9264012B2 (en) 2012-06-25 2016-02-16 Ppc Broadband, Inc. Radio frequency signal splitter
US9929457B2 (en) 2012-06-25 2018-03-27 Ppc Broadband, Inc. Radio frequency signal splitter
US10582160B2 (en) 2016-06-30 2020-03-03 Ppc Broadband, Inc. MoCA entry device
US11076129B2 (en) 2016-06-30 2021-07-27 Ppc Broadband, Inc. MoCA entry device
US11647162B2 (en) 2016-06-30 2023-05-09 Ppc Broadband, Inc. MoCA entry device
US10212392B2 (en) 2016-06-30 2019-02-19 Ppc Broadband, Inc. Passive enhanced MoCA entry device
US11076191B2 (en) 2018-01-19 2021-07-27 Ppc Broadband, Inc. Systems and methods for extending an in-home splitter network

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