发明名称 |
METHOD OF GENERATING A RING SIGNAL IN A SUBSCRIBER LINE INTERFACE CIRCUIT |
摘要 |
In a method and a device for controlling the magnitude of the generated ring signal in a the Subscriber Line Interface Circuit (SLIC) the voltage of the A and B lines to the subscriber from the SLIC is compared to a reference voltage. The device is arranged to control the magnitude of the generated ring signal voltage in response to the outcome of the comparison. In particular, the device is arranged to control the ring signal voltage so that the ring signal voltage is reduced if the voltage on the A or B line exceeds the reference voltage. Also, the reference voltage is preferably chosen so that there is no risk for saturation of the final stages. The reference voltage is preferably selected to have a value being related to the value of the negative supply voltage.
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申请公布号 |
WO0199394(A8) |
申请公布日期 |
2002.02.28 |
申请号 |
WO2001SE01446 |
申请日期 |
2001.06.21 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL);EMERICKS, ANDERS;HELLBERG, HENRIK |
发明人 |
EMERICKS, ANDERS;HELLBERG, HENRIK |
分类号 |
H04M3/06;H04M3/30;H04M19/02;(IPC1-7):H04M19/02 |
主分类号 |
H04M3/06 |
代理机构 |
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主权项 |
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地址 |
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