DEVICE FOR INCREASING THE RATE OF A PULSE TRAIN AND ITS USE IN PRINTING DEVICES

    公开(公告)号:DE2962444D1

    公开(公告)日:1982-05-19

    申请号:DE2962444

    申请日:1979-07-16

    Applicant: IBM

    Inventor: VAUTIER REMI

    Abstract: A pulse generating device for speeding-up the rate of a pulse train from N to N+n wherein each of the pulses in the N+n pulse train is synchronized with the immediately preceding pulse in the original N pulse train. A count-up counter is reset upon each original pulse and counts up from zero, at frequency F/N+n, up to the following original pulse. A count-down counter is loaded with the contents of the count-up counter when the following original pulse occurs or when the output pulses occur with the exception of the last pulse in the interval when the time interval between said original pulses includes several generated output pulses, and is decremented at frequency F/M up to zero. A variable presettable counter provides the count-down counter with frequency F/M when each original pulse appears or when the output pulses appear with the exception of the last pulse in the interval when the time interval between the original pulses includes several output pulses. A control memory supplies values M to the variable counter in response to the original pulses or to the output pulses with the exception of the last pulse in the time interval between two original pulses. The output pulses are produced each time the count-down counter reaches value zero.

    2.
    发明专利
    未知

    公开(公告)号:FR2437741A1

    公开(公告)日:1980-04-25

    申请号:FR7828295

    申请日:1978-09-26

    Applicant: IBM FRANCE

    Inventor: VAUTIER REMI

    Abstract: A pulse generating device for speeding-up the rate of a pulse train from N to N+n wherein each of the pulses in the N+n pulse train is synchronized with the immediately preceding pulse in the original N pulse train. A count-up counter is reset upon each original pulse and counts up from zero, at frequency F/N+n, up to the following original pulse. A count-down counter is loaded with the contents of the count-up counter when the following original pulse occurs or when the output pulses occur with the exception of the last pulse in the interval when the time interval between said original pulses includes several generated output pulses, and is decremented at frequency F/M up to zero. A variable presettable counter provides the count-down counter with frequency F/M when each original pulse appears or when the output pulses appear with the exception of the last pulse in the interval when the time interval between the original pulses includes several output pulses. A control memory supplies values M to the variable counter in response to the original pulses or to the output pulses with the exception of the last pulse in the time interval between two original pulses. The output pulses are produced each time the count-down counter reaches value zero.

    4.
    发明专利
    未知

    公开(公告)号:DE69026096D1

    公开(公告)日:1996-04-25

    申请号:DE69026096

    申请日:1990-12-05

    Applicant: IBM

    Abstract: Coupling device for the connection of a Data Circuit Terminating Equipment DCE to a given Public Switched Telephone Network PSTN and to a local telephone set. The coupler includes means for providing said local telephone set with DC current whereby the microphone and the headphone of the telephone can be used respectively for transmitting and receiving vocal messages from the a DTE which is connected to said DCE. The invention also provides a DCE for the connection of a DTE toga a PSTN and to a local telephone set including a coupler circuit having the electronic components matching the electric requirements of a given PSTN. The coupler further includes means for providing the telephone set with DC current whereby vocal messages can be transmitted and received from the DTE to the telephone set. The invention further provides a DCE for the connection of a DTE to a PSTN and to a local telephone set which includes means for removably attaching a coupler circuit having the electronic components matching the electrical requirements of a given PSTN and further including means for providing the telephone set with DC current whereby vocal messages can be transmitted and received from the telephone set to the DTE.

    5.
    发明专利
    未知

    公开(公告)号:DE69026096T2

    公开(公告)日:1996-10-02

    申请号:DE69026096

    申请日:1990-12-05

    Applicant: IBM

    Abstract: Coupling device for the connection of a Data Circuit Terminating Equipment DCE to a given Public Switched Telephone Network PSTN and to a local telephone set. The coupler includes means for providing said local telephone set with DC current whereby the microphone and the headphone of the telephone can be used respectively for transmitting and receiving vocal messages from the a DTE which is connected to said DCE. The invention also provides a DCE for the connection of a DTE toga a PSTN and to a local telephone set including a coupler circuit having the electronic components matching the electric requirements of a given PSTN. The coupler further includes means for providing the telephone set with DC current whereby vocal messages can be transmitted and received from the DTE to the telephone set. The invention further provides a DCE for the connection of a DTE to a PSTN and to a local telephone set which includes means for removably attaching a coupler circuit having the electronic components matching the electrical requirements of a given PSTN and further including means for providing the telephone set with DC current whereby vocal messages can be transmitted and received from the telephone set to the DTE.

    6.
    发明专利
    未知

    公开(公告)号:DE69026095T2

    公开(公告)日:1996-10-02

    申请号:DE69026095

    申请日:1990-12-05

    Applicant: IBM

    Abstract: Coupling device (150) according to the invention for connecting a DCE to a PSTN including the electronic components matching the electric requirements of a specific PSTN. The coupling device comprises plugging means for removably connecting the latter to the DCE, means (227) for storing an identification code corresponding to a specific type of PSTN to which the coupler is intended to be connected to. The coupling device (150) further comprises means (226) responsive to a control signal received from the DCE for transmitting the identification code to the DCE. The DCE connected to the coupling device includes processing means and a storage for storing tables, each table comprising data characterizing a specific PSTN which the DCE is intended to operate with. The DCE reads the identification code during an identification phase by transmitting the control signal and selects in response to said reading the appropriate table corresponding to the coupling device. Therefore, by simply connecting an appropriate coupling device, a same DCE can be easily adapted to operate with a specific PSTN. Moreover, since the voluminous components are located into the coupling device, the DCE can be easily integrated, for example in one workstation.

    7.
    发明专利
    未知

    公开(公告)号:DE69026095D1

    公开(公告)日:1996-04-25

    申请号:DE69026095

    申请日:1990-12-05

    Applicant: IBM

    Abstract: Coupling device (150) according to the invention for connecting a DCE to a PSTN including the electronic components matching the electric requirements of a specific PSTN. The coupling device comprises plugging means for removably connecting the latter to the DCE, means (227) for storing an identification code corresponding to a specific type of PSTN to which the coupler is intended to be connected to. The coupling device (150) further comprises means (226) responsive to a control signal received from the DCE for transmitting the identification code to the DCE. The DCE connected to the coupling device includes processing means and a storage for storing tables, each table comprising data characterizing a specific PSTN which the DCE is intended to operate with. The DCE reads the identification code during an identification phase by transmitting the control signal and selects in response to said reading the appropriate table corresponding to the coupling device. Therefore, by simply connecting an appropriate coupling device, a same DCE can be easily adapted to operate with a specific PSTN. Moreover, since the voluminous components are located into the coupling device, the DCE can be easily integrated, for example in one workstation.

    COUPLING DEVICE TO BE CONNECTED TO A DCE FOR THE CONNECTION TO A PUBLIC SWITCHED TELEPHONE NETWORK HAVING A LOCAL POWER SUPPLY CIRCUIT FOR ALLOWING THE USE OF THE LOCAL TELEPHONE,DCE AND WORKSTATION INCLUDING THE SAME

    公开(公告)号:CA2055014C

    公开(公告)日:1995-06-20

    申请号:CA2055014

    申请日:1991-11-06

    Applicant: IBM

    Abstract: Coupling device for the connection of a Data Circuit Terminating Equipment DCE to a given Public Switched Telephone Network PSTN and to a local telephone set. The coupler includes means for providing said local telephone set with DC current whereby the microphone and the headphone of the telephone can be used respectively for transmitting and receiving vocal messages from the a DTE which is connected to said DCE. The invention also provides a DCE for the connection of a DTE to a a PSTN and to a local telephone set including a coupler circuit having the electronic components matching the electric requirements of a given PSTN. The coupler further includes means for providing the telephone set with DC current whereby vocal messages can be transmitted and received from the DTE to the telephone set. The invention further provides a DCE for the connection of a DTE to a PSTN and to a local telephone set which includes means for removably attaching a coupler circuit having the electronic components matching the electrical requirements of a given PSTN and further including means for providing the telephone set with DC current whereby vocal messages can be transmitted and received from the telephone set to the DTE.

    Coupling device to be connected to a DCE for the connection to a public switched telephone network having a local power supply circuit for allowing the use of the local

    公开(公告)号:SG42315A1

    公开(公告)日:1997-08-15

    申请号:SG1996000243

    申请日:1990-12-05

    Applicant: IBM

    Abstract: Coupling device for the connection of a Data Circuit Terminating Equipment DCE to a given Public Switched Telephone Network PSTN and to a local telephone set. The coupler includes means for providing said local telephone set with DC current whereby the microphone and the headphone of the telephone can be used respectively for transmitting and receiving vocal messages from the a DTE which is connected to said DCE. The invention also provides a DCE for the connection of a DTE toga a PSTN and to a local telephone set including a coupler circuit having the electronic components matching the electric requirements of a given PSTN. The coupler further includes means for providing the telephone set with DC current whereby vocal messages can be transmitted and received from the DTE to the telephone set. The invention further provides a DCE for the connection of a DTE to a PSTN and to a local telephone set which includes means for removably attaching a coupler circuit having the electronic components matching the electrical requirements of a given PSTN and further including means for providing the telephone set with DC current whereby vocal messages can be transmitted and received from the telephone set to the DTE.

    Coupling device to be connected to a DCE for the connection to a public switched telephone network having a local power supply circuit for allowing the use of the local telephone DCE and workstation including the same

    公开(公告)号:HK202496A

    公开(公告)日:1996-11-15

    申请号:HK202496

    申请日:1996-11-07

    Applicant: IBM

    Abstract: Coupling device for the connection of a Data Circuit Terminating Equipment DCE to a given Public Switched Telephone Network PSTN and to a local telephone set. The coupler includes means for providing said local telephone set with DC current whereby the microphone and the headphone of the telephone can be used respectively for transmitting and receiving vocal messages from the a DTE which is connected to said DCE. The invention also provides a DCE for the connection of a DTE toga a PSTN and to a local telephone set including a coupler circuit having the electronic components matching the electric requirements of a given PSTN. The coupler further includes means for providing the telephone set with DC current whereby vocal messages can be transmitted and received from the DTE to the telephone set. The invention further provides a DCE for the connection of a DTE to a PSTN and to a local telephone set which includes means for removably attaching a coupler circuit having the electronic components matching the electrical requirements of a given PSTN and further including means for providing the telephone set with DC current whereby vocal messages can be transmitted and received from the telephone set to the DTE.

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