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1. 发明授权

US4734933A Telephone line status circuit 失效
标题翻译：电话线状态电路
公开(公告)号：US4734933A
公开(公告)日：1988-03-29
申请号：US794696
申请日：1985-11-04
申请人： John A. Barsellotti , Douglas C. Oddy
发明人： John A. Barsellotti , Douglas C. Oddy
IPC分类号： H04M15/00 , H04M3/22 , H04M19/02 , H04Q3/58 , H04Q3/72
CPC分类号： H04M19/026 , H04M3/2272
摘要： A circuit for detecting a first plurality of status signals on a multiplicity of telephone lines and generating a second lesser plurality of control signals, less than the first plurality, in response thereto. Predetermined ones of the control signals are transmitted via a multiplexing circuit to a comparator circuit. A digital-to-analog converter generates analog threshold voltages for application to the comparator circuit in response to receiving command signals from a microprocessor. The comparator circuit generates a third lesser plurality of output signals, less than the second plurality, indicative of the status of a multiplicity of remote trunk circuits connected to the telephone lines. The circuit is inexpensive and occupies little circuit board area.
摘要翻译：一种电路，用于在多个电话线路上检测第一多个状态信号，并响应于此产生小于第一多个的第二较小多个控制信号。控制信号中的预定的信号通过复用电路发送到比较器电路。数模转换器响应于接收到来自微处理器的命令信号而产生用于施加到比较器电路的模拟阈值电压。比较器电路产生指示连接到电话线的多个远程中继电路的状态的小于第二多个的第三较小的输出信号。电路便宜，电路板面积很小。

2. 发明授权

US4776007A Solid state trunk circuit 失效
标题翻译：固态中继电路
公开(公告)号：US4776007A
公开(公告)日：1988-10-04
申请号：US865961
申请日：1986-05-22
申请人： Zbigniew B. Styrna , Douglas C. Oddy
发明人： Zbigniew B. Styrna , Douglas C. Oddy
IPC分类号： H04M7/14 , H04M7/00 , H04M7/04 , H04M7/10 , H04M19/00 , H04Q3/42
CPC分类号： H04M7/0096
摘要： A trunk circuit is disclosed for coupling a bidirectional lead pair, such as balanced tip and ring leads, to a pair of unidirectional leads such as unbalanced input and output leads. The trunk circuit incorporates a small inexpensive transformer for effecting this coupling and for providing large common mode signal isolation and correct longitudinal balance. Circuitry is provided for matching the nominal balanced AC and DC line impedances. The trunk circuit also provides circuitry for generating dial pulse signals under control of a microprocessor or other external controller.
摘要翻译：公开了用于将诸如平衡尖端和环形引线的双向引线对耦合到诸如不平衡输入和输出引线的一对单向引线的中继电路。干线电路包含一个小型便宜的变压器，用于实现该耦合并提供大的共模信号隔离和正确的纵向平衡。提供电路用于匹配标称平衡交流和直流线路阻抗。中继电路还提供用于在微处理器或其它外部控制器的控制下产生拨号脉冲信号的电路。

3. 发明授权

US06647103B2 Palm PC dockable phone 有权
标题翻译：掌上电脑可停靠电话
公开(公告)号：US06647103B2
公开(公告)日：2003-11-11
申请号：US09502085
申请日：2000-02-10
申请人： Debbie Pinard , Ed Bijman , Douglas C. Oddy
发明人： Debbie Pinard , Ed Bijman , Douglas C. Oddy
IPC分类号： H04M1100
CPC分类号： H04M1/2473 , G06F1/1632 , H04M1/215 , H04M1/2535
摘要： A palm PC dockable phone, comprising a personal computer running a software application for implementing telephony functions, a personal digital assistant (PDA) device providing a user display and input interface, and a telephone set connected to the personal computer and in communication with the PDA device, wherein the telephone set incorporates phone firmware for communicating with the software application and PDA firmware for communicating with the PDA device for controlling the telephony functions via the user display and input interface.
摘要翻译：一种掌上电脑可停靠电话，包括运行用于实现电话功能的软件应用的个人计算机，提供用户显示和输入接口的个人数字助理（PDA）设备，以及连接到个人计算机并与PDA通信的电话机装置，其中电话机包括用于与软件应用通信的电话固件和用于与PDA设备通信的PDA固件，用于经由用户显示和输入接口来控制电话功能。

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