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    ERDTASTENERFASSUNGSSCHALTUNG UND VERFAHREN ZUR STÖRSICHEREN ERFASSUNG DER BETÄTIGUNG EINER ERDTASTE BEI TELEPHONEN
    2.
    发明公开
    ERDTASTENERFASSUNGSSCHALTUNG UND VERFAHREN ZUR STÖRSICHEREN ERFASSUNG DER BETÄTIGUNG EINER ERDTASTE BEI TELEPHONEN 有权
    ERDTASTENERFASSUNGSSCHALTUNG AND METHOD FOR地球的干扰收购通过手机操作

    公开(公告)号：EP1183854A2

    公开(公告)日：2002-03-06

    申请号：EP00945593.2

    申请日：2000-05-30

    申请人： Infineon Technologies AG

    发明人： NÖSSING, Gerhard

    IPC分类号： H04M3/22

    CPC分类号： H04M19/026

    摘要： The invention relates to a ground key detection circuit for detecting the activation of a ground key on a telephone in a manner that is resistant to interference, comprising the following: a longitudinal current detection device (4) for detecting a longitudinal current that flows when the ground key (6) is activated; a comparator (6) for comparing the longitudinal current detected with a threshold value; and a monitoring circuit (8) for detecting the excess period, i.e. the period for which the longitudinal current exceeds the current threshold value, and a low period; i.e. the period for which the longitudinal current falls below the threshold value. The monitoring circuit (8) emits a ground key detection signal when the excess period is greater than the low period.

    A METHOD FOR OFF-HOOK DETECTION DURING RINGING AND A SUBSCRIBER LINE INTERFACE CIRCUIT FOR OFF-HOOK DETECTION DURING RINGING
    3.
    发明授权
    A METHOD FOR OFF-HOOK DETECTION DURING RINGING AND A SUBSCRIBER LINE INTERFACE CIRCUIT FOR OFF-HOOK DETECTION DURING RINGING 失效
    方法捕获的非挂机状态期间振铃和振铃时的用户线接口电路，用于记录非挂机状态

    公开(公告)号：EP0740880B1

    公开(公告)日：1999-11-03

    申请号：EP95907567.2

    申请日：1995-01-19

    申请人： TELEFONAKTIEBOLAGET LM ERICSSON

    发明人： RANDAHL, Torbjörn

    IPC分类号： H04M19/00 ,  H04M3/22

    CPC分类号： H04M3/2272 ,  H04M19/026

    摘要： A method for off-hook detection at a subscriber line interface circuit upon the occurence of a ringing signal which preferably lacks a direct current component, as well as the use of a subscriber line interface circuit for the performing of said method, comprising the steps of generating a signal which is a function of the line current (il) through the subscriber line, measuring the time ( DELTA t) the signal exceeds a first reference value (Vth), which represents a predetermined current value, comparing the measured time ( DELTA t) with a predetermined time value and indicating off-hook in a processor in dependence of the comparison.

    A METHOD FOR OFF-HOOK DETECTION DURING RINGING AND THE USE OF A SUBSCRIBER LINE INTERFACE CIRCUIT FOR OFF-HOOK DETECTION DURING RINGING
    5.
    发明公开
    A METHOD FOR OFF-HOOK DETECTION DURING RINGING AND THE USE OF A SUBSCRIBER LINE INTERFACE CIRCUIT FOR OFF-HOOK DETECTION DURING RINGING 失效
    捕获振铃和的用户线接口电路，用于检测在使用过程中阻断自由的方法时，不要挂，而振铃

    公开(公告)号：EP0740880A1

    公开(公告)日：1996-11-06

    申请号：EP95907567.0

    申请日：1995-01-19

    申请人： TELEFONAKTIEBOLAGET LM ERICSSON

    发明人： RANDAHL, Torbjörn

    IPC分类号： H04M3 ,  H04M19 ,  H04Q3

    CPC分类号： H04M3/2272 ,  H04M19/026

    摘要： A method for off-hook detection at a subscriber line interface circuit upon the occurence of a ringing signal which preferably lacks a direct current component, as well as the use of a subscriber line interface circuit for the performing of said method, comprising the steps of generating a signal which is a function of the line current (il) through the subscriber line, measuring the time (Δt) the signal exceeds a first reference value (Vth), which represents a predetermined current value, comparing the measured time (Δt) with a predetermined time value and indicating off-hook in a processor in dependence of the comparison.

    RING TRIP CIRCUIT FOR SUBSCRIBER TELEPHONE
    6.
    发明授权
    RING TRIP CIRCUIT FOR SUBSCRIBER TELEPHONE 失效
    用于用户电话的环形电路

    公开(公告)号：EP0323516B1

    公开(公告)日：1994-08-31

    申请号：EP88905448.2

    申请日：1988-06-18

    申请人： FUJITSU LIMITED

    发明人： TOJO, Toshiro ,  TAKATO, Kenji ,  KINOSHITA, Kazumi ,  YAMAMOTO, Yuzo ,  IKETANI, Yozo ,  ITO, Shin-ichi

    IPC分类号： H04M19/02

    CPC分类号： H04M19/026

    摘要： Disclosed is an improved ring trip circuit for a subscriber telephone, for detecting an on-hook state or an off-hook state of the telephone. The ring trip circuit can be formed in a small size and can be formed by an LSI. The ring trip circuit includes a voltage detecting circuit (2), for detecting a voltage difference (DELTAV) between both ends of a ringer sending resistor, having a first circuit (S1, S2, A1 ~ B3) converting the voltage difference to a current difference, and further having a second circuit (F) converting the current difference to a voltage, the voltage difference varying in response to an on-hook state or an off-hook state of the telephone, and a state detecting circuit (3) for detecting the on-book state or the off-hook state in response to a value of the voltage from the voltage detecting circuit. The voltage detecting circuit is formed by a plurality of current mirror circuits, each of which includes at least two transistors. The state detecting circuit includes a comparator circuit (CP1) formed by a plurality of transistors.

    摘要翻译： 公开了一种用于用户电话的改进的振铃跳闸电路，用于检测电话的挂机状态或摘机状态。 环形跳闸电路可以小尺寸形成并且可以由LSI形成。 振铃跳闸电路包括电压检测电路（2），用于检测振铃发送电阻器两端之间的电压差（ΔV），具有将电压差转换为电流的第一电路（S1，S2，A1〜B3） （F）将电流差转换成电压，该电压差响应于电话机的挂机状态或摘机状态而变化，以及状态检测电路（3） 响应于来自电压检测电路的电压值检测书本状态或摘机状态。 电压检测电路由多个电流镜电路形成，每个电流镜电路包括至少两个晶体管。 状态检测电路包括由多个晶体管形成的比较器电路（CP1）。

    Schaltungsanordnung zur Schleifenschlussindikation während der Rufphase
    9.
    发明公开
    Schaltungsanordnung zur Schleifenschlussindikation während der Rufphase 失效
    用于在振铃阶段环路闭合指示电路布置。

    公开(公告)号：EP0231466A1

    公开(公告)日：1987-08-12

    申请号：EP86116428.3

    申请日：1986-11-26

    申请人： SIEMENS AKTIENGESELLSCHAFT

    发明人： Lechner, Robert, Dipl.-Ing. ,  Wingerath, Norbert, Dipl.-Ing.

    IPC分类号： H04M19/02 ,  H04Q11/04

    CPC分类号： H04Q11/04 ,  H04M19/026

    摘要： Bei einer in Teilnehmerschnittstellenbaustein (SLIC) und Signalprozessorbaustein (SiCoFi) der die A/D-Wandlung so­wie die Filterung realisiert, gegliederten Teilnehmeran­schlußschaltung wird während der Rufphase dem Signalprozes­sorbaustein ein vom Teilnehmerleitungsstrom abgeleitetes Spannungssignal statt des Sprachsignals zugeführt, dort einer A/D-Wandlung unterworfen und gefiltert, jedoch ohne Hochfaßfilterung. Die entstehenden Digitalsignale werden über eine Periode des Rufsignals aufsummiert und mit einem Grenzwert verglichen, bei dessen Überschreiten ein Schlei­fenschlußsignal abgegeben wird.

    摘要翻译： 在一个在用户接口模块（SLIC）和信号处理器模块（SICOFI）实现A / D转换和滤波，铰接式用户线接口电路被提供在振铃相从用户线电流电压信号而不是语音信号导出的信号处理器模块的信号时，有进行A / D转换 和过滤，但没有Hochfaßfilterung。 数字产生的信号被求和一段振铃信号的和与其中，如果超过了，一个环路闭合信号被发射的限制值进行比较。