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1. 发明授权

US4639551A Regulated power supply circuit particularly for telephone set 失效
标题翻译：稳压电源电路特别适用于电话机
公开(公告)号：US4639551A
公开(公告)日：1987-01-27
申请号：US629992
申请日：1984-07-12
申请人： Jean C. Kaire
发明人： Jean C. Kaire
IPC分类号： H04M1/00 , H04M19/04 , H04M19/08 , H04M19/00
CPC分类号： H04M19/04 , H04M19/08
摘要： The invention relates to power supply circuits, and in particular those used for directly supplying, from a telephone line, the bell or other items in a telephone set. In order to avoid unacceptable crosstalk or distortion due to saturation of the power supply circuit when the AC signal on the line drops below the value (Vs) of the regulated output voltage of the power supply, there is provision for detection of this saturation (56) and current shunting (T2, T3) that increases progressively with saturation, such that, seen from the line, the current consumption or impedance of the set remains constant despite the disturbances due to saturation.
摘要翻译：本发明涉及电源电路，特别是用于从电话线直接提供电话机中的钟或其他物品的电源电路。为了避免由于电源电路的饱和引起的不可接受的串扰或失真，当线路上的交流信号降低到电源稳压输出电压的值（Vs）以下时，就会提供这种饱和度的检测（56 ）和电流分流（T2，T3），其随着饱和度逐渐增加，使得从线路看，即使由于饱和而导致的干扰，该组的电流消耗或阻抗也保持恒定。

2. 发明授权

US4536616A Microphone or mouthpiece signal suppression circuit 失效
标题翻译：麦克风或接口信号抑制电路
公开(公告)号：US4536616A
公开(公告)日：1985-08-20
申请号：US566434
申请日：1983-12-28
申请人： Jean C. Kaire
发明人： Jean C. Kaire
IPC分类号： H04M1/60 , H04M1/58 , H04M1/76
CPC分类号： H04M1/585 , H04M1/76
摘要： The invention relates to a circuit for a telephone set. In order to eliminate the mouthpiece signal between the receiver and the telephone set, there are provided a subtraction means receiving the mouthpiece signal and the composite signal present on the telephone line, one of the two being produced by different compensation impedances, and on the other hand a mixer controlled by a circuit as a function of the telephone line impedance. The two compensation impedances respectively correspond to the compensation of a long line and the compensation of a short line and the output of the mixer supplies a signal mixture, with variable proportions, which effectively suppresses the mouthpiece signal, no matter what the length of the telephone line.
摘要翻译：本发明涉及一种用于电话机的电路。为了消除接收机和电话机之间的接口信号，提供了一种减法装置，其接收接口信号和存在于电话线上的复合信号，其中一个由不同的补偿阻抗产生，另一个由另一个将由电路控制的混频器作为电话线阻抗的函数。两个补偿阻抗分别对应于长线的补偿和短线的补偿，并且混频器的输出提供可变比例的信号混合，这有效地抑制了接口信号，不管电话的长度是多少线。

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