KR960003260A

KR960003260A - Integrated Ringer Relay Circuits and Methods

Info

Publication number: KR960003260A
Application number: KR1019950018286A
Authority: KR
Inventors: 엠. 코트로우 제랄드
Original assignee: 카렌 지. 핑크; 해리스 코포레이션
Priority date: 1994-06-29
Filing date: 1995-06-29
Publication date: 1996-01-26
Also published as: GB2290921A; CN1365228A; CN1367603A; JPH0851652A; GB9513091D0

Abstract

가입자 회선 인터페이스 회로("SLIC")를 전화시스템에서 링어발생기(울림신호발생기)로부터 격리시키는 회로 및 방법이 개시 되어 있다. 계인블록장치의 사용은 링어발생기가 이용될때에는 신호게인을 제공하기 위한 것이고 링어신호가 존재할 때 고임피던스를 제공하기 위한 것이다. SLIC의 팁 및 링 접속부를 위한 AC 및 DC임피던스가 별도로 설정되어 있는 전화시스템용 전류 모드 가입자 회선 인터베이스 회로(SLIC)가 기재되어 있다. 가입자가 회선 인터페이스 회로(SLIC)용 접지키 검출기는 팁 및 링 전압 감지 저항체(RS1 및 RS2)로부터의 정보를 이용하여, 예컨대 접지키 또는 장애가 발생했을 때에, 전화회선이 링측이 접지되었는지의 여부를 판정한다.A circuit and method are disclosed for isolating a subscriber line interface circuit ("SLIC") from a ringer generator (ring signal generator) in a telephone system. The use of the lock-in block device is to provide a signal gain when a ringer generator is used and to provide high impedance when a ringer signal is present. A current mode subscriber line interbase circuit (SLIC) is described for a telephone system in which the AC and DC impedances for the tip and ring connections of the SLIC are set separately. The subscriber uses the information from the tip and ring voltage sensing resistors RS1 and RS2 for the ground key detector for the line interface circuit (SLIC) to determine whether the telephone line is grounded at the ring side, for example when a ground key or fault occurs. Determine.

Description

Integrated Ringer Relay Circuits and Methods

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명에 따른 회로의 부분블록 다이어그램이고,3 is a partial block diagram of a circuit according to the invention,

제4도는 본 발명에 따른 다른 회로의 부분블록 다이어그램이고,4 is a partial block diagram of another circuit according to the invention,

제5도는 본 발명에 사용될 수 있는 연산증폭기의 한 실시예를 상세히 표시하는, 본 발명에 따른 다른 회로의 부분 블록 다이어그램이고,5 is a partial block diagram of another circuit according to the present invention, detailing one embodiment of an operational amplifier that may be used in the present invention,

제6도는 SLIC에 통합되어 있는 감지회로의 보호를 나타내는, 본 발명에 따른 다른 회로의 부분 블록 다이어그램이고,6 is a partial block diagram of another circuit according to the present invention, showing protection of a sense circuit integrated in a SLIC,

제7도는 SLIC의 2선측의 기능작동을 표시하는, 본 발명의 SLIC의 한 실시예의 부분 블록 다이어그램이고,7 is a partial block diagram of one embodiment of the SLIC of the present invention, indicating the functional operation of the 2-wire side of the SLIC,

제8도는 AC 및 DC 임피더슨가 별도로 설정될 수 있는 본 발명의 한 실시예의 일부블록 및 일부 회로 다이어그램이고,8 is a partial block and partial circuit diagram of one embodiment of the present invention in which AC and DC Impedison can be set separately,

제9도는 본 발명의 접지키 검출회로의 한 실시예의 블록 다이어그램이고,9 is a block diagram of one embodiment of a ground key detecting circuit of the present invention;

제10도는 제9도의 접지키 검출회로와 함께 예시된 본 발명의 장애 검출회로의 한 실시예의 블록 다이어그램이다.10 is a block diagram of one embodiment of a fault detection circuit of the present invention illustrated in conjunction with the ground key detection circuit of FIG.

Claims

Subscriber line interface circuit ("SLIC") having a tip and a ring path electrically interconnecting the SLIC and the telephone, a ringer generator for generating a ringer signal, and switch means for selectively applying the ringer signal to the tip and ring path And a selective operable gain setting blocking device to isolate SLIC from the ringer signal.

2. The apparatus of claim 1, wherein the gain setting blocking device is an amplifier capable of entering a tristate mode, the output of the amplifier having high impedance when in the tristate mode, and the amplifier being selective to drive the tip path. And the amplifier is selectively operated to drive a ring path.

3. A circuit according to claim 2, characterized in that it comprises means for driving said amplifier, said drive means being a current source.

4. The method of claim 3, wherein the driving means comprises a current source, a bipolar transistor and a resistant diode, wherein the source, transistor and diode are in series with the amplifier and with a second source, a second bipolar transistor and a second blocking diode. And the second source, the second transistor, and the second diode are electrically connected to the amplifier in series.

5. The method of claim 4, wherein said source, said transistor and said diode are operated to supply current to said amplifier, said source, said transistor and said diode being operated to suck (sink) current from said amplifier. Circuit.

The circuit according to any one of claims 2 to 5, wherein the gain setting blocking device is a current gain blocking device or a voltage gain blocking device.

A tip and ring path for electrically interconnecting the SLIC and the telephone, a ringer signal, a selective actuating switch means for selectively applying the ringer signal to the tip and the ring path, and a selective operation to isolate the SLIC from the ringer signal. A telephone line circuit that isolates a ringer signal from a subscriber line interface circuit (SLIC), characterized in that it is a sex gain setting blocking device.

8. The apparatus of claim 7, wherein the gain blocking device is an amplifier capable of entering a tristate mode, and the output of the amplifier has a high impedance when in the tristate mode, and the amplifier drives a tip path and a ring path. And is selectively operated to be a current gain amplifier or a voltage gain amplifier.

First means for providing an average current of the DC component of the SLIC tip and ring voltage, second means for providing an average current of the AC component of the SLIC tip and ring voltage, and AC and DC impedance of the average of the DC components so that AC and DC impedance setting circuits for tip and ring connections of subscriber line interface circuits (SLIC), characterized by third means for changing the amplitude of the average of the AC components relative to amplitude.

10. The apparatus of claim 9, wherein the first means comprises a DC filter for removing an AC component from a tip and ring current proportional to the tip and ring voltages, and a first averaging device for averaging the remaining DC components. The second means comprises a second averaging device for averaging the tip and ring currents, and combining the average of the DC components from the first means with the averages of the tip and ring currents from the second averaging device to obtain an average of the AC components. And the third means is a means for increasing the average gain of the AC component from the coupler.

A current according to claim 9 or 10, characterized by (a) an average of the DC component from the first means, (b) an amplified average of the AC component from the third means, and (c) a current proportional to the received voltage. Means for amplifying the sum and providing the amplified sum to the tip and ring connections of the SLIC.

12. The circuit according to any one of claims 9 to 11, wherein the third means is a voltage amplifier between two resistors for amplifying an average of an AC component, and the ratio of the resistance between the two resistors is SLIC 4 to 2 wire. Circuitry for determining gain to and AC impedance for tip and ring connections.

The SLIC includes current means for separately setting AC and DC impedances for the tip and ring connections of the SLIC as described in any of claims 9 to 12. Circuit (SLIC).

The circuit according to claim 13, wherein the current mode means further includes resistance means for setting a gain from SLIC 4 to 2 wires separately from the gain from SLIC 2 to 4 wires.

First and second current mirrors providing separate tip and ring currents proportional to the tip and ring voltages on the two wire side of the SLIC, DC filters and first averaging to provide the average currents of the DC components of the tip and ring currents, respectively. Means for providing an average current of the AC component of the tip and ring currents by removing the average of the DC component from the average of the device, tip and ring currents and a second averaging providing the average current of the device, tip and ring current A current amplifier that amplifies the average of the AC component of the current and provides a copy of the amplified current from the current amplifier to the transmit voltage connection on the 4-wire side of the SLIC, providing a receive current proportional to the received voltage on the 4-wire side of the SLIC A voltage-to-current converter, and two that amplify the receive current, the amplified average of the AC current from the current amplifier, and the feedback current (feedback current) and provide the amplified feedback current to the 2-wire side of the SLIC. It characterized in that the aeration is in a subscriber line interface circuit (SLIC).

SLIC is a ground key detector for a subscriber line interface circuit (SLIC) having a first current mirror providing a current proportional to the tip voltage and a second current mirror providing a current proportional to the ring voltage A first DC filter providing a DC tip current proportional to the DC component of the current from the mirror, a second DC filter providing a DC ring current proportional to the DC component of the current from the second current mirror, a source of reference current, a DC ring And a first comparator for comparing the current with the sum of the DC tip current and the reference current and indicating that a ground key has been detected based on the result of the comparison.

17. The detector of claim 16 comprising means for providing a signal to the SLIC relating to the DC tip current and the DC ring current for use in the hybrid portion of the SLIC.

18. The apparatus of claim 16 or 17, wherein the first and second DC filters each include a current mirror, such that a third reflecting the current before the current from the first current mirror is provided to the first DC filter. And a fourth current mirror reflecting the current before the DC tip current from the current mirror and the first DC filter is provided to the first comparator.

17. The second comparator of claim 16 comprising a second comparator for comparing a DC tip current to the sum of the DC ring current and the reference current and indicating that a fault has been detected based on the result of the comparison. The detector is characterized in that a fault is detected when the DC tip current is greater than the sum of the DC ring current and the reference current.

20. The detector of claim 19, comprising a fifth current mirror that reflects the current from the second DC filter before being supplied to the second comparator.

A source of reference current, means for converting the voltage difference between tip voltage and ground to tip current, means for converting the voltage difference between ring voltage and cell voltage to ring current, and ring current to the sum of tip current and reference current; A ground key detector for an SLIC as described in any of claims 16 to 20, comprising means for comparing.

※ Note: The disclosure is based on the initial application.