公开(公告)号：US4609863A

公开(公告)日：1986-09-02

申请号：US661994

申请日：1984-10-18

申请人： Kachio Asai ,  Yuji Tsuruga

发明人： Kachio Asai ,  Yuji Tsuruga

IPC分类号： G05F1/56 ,  H04M19/08 ,  G05F5/00

CPC分类号： H04M19/08

摘要： This power supply device comprises a voltage regulating element, a constant-current source, first and second constant-current circuits, and a current switching circuit interposed between the first and second constant-current circuits and the constant-current source, and by comparing an input voltage with an output voltage to introduce constant current from the first constant-current circuit to the voltage regulating element when the input voltage is higher than the output voltage, while introducing the constant current from the second constant-current circuit to ground terminal when the input voltage is lower than the output voltage. Thus, a stabilized DC voltage may be produced from a DC voltage including a superposed AC signal without interfering with the AC communications signal.

摘要翻译： 该电源装置包括电压调节元件，恒流源，第一和第二恒流电路，以及插入在第一和第二恒流电路与恒流源之间的电流开关电路， 具有输出电压的输入电压，当输入电压高于输出电压时，将来自第一恒流电路的恒定电流引入电压调节元件，同时当恒定电流从第二恒流电路引入接地端子时 输入电压低于输出电压。 因此，可以从包括叠加的AC信号的DC电压产生稳定的DC电压，而不会干扰AC通信信号。

公开(公告)号：US4592069A

公开(公告)日：1986-05-27

申请号：US578062

申请日：1984-02-08

申请人： Robert J. Redding

发明人： Robert J. Redding

IPC分类号： H04M19/08 ,  H04M19/00

CPC分类号： H04M19/08

摘要： A modem or other data handling apparatus for connection to a transmission line includes an inductance simulation circuit for providing a low d.c. resistance to allow circulation of a line holding current, whilst presenting a high a.c. shunt impedance to the audio data tones on the line. The simulation circuit comprises two tranistors connected as a high gain amplifier across an input resistor in the modem/line coupling circuit amplifier via a capacitor and the amplifier applies tone signals across the input resistor to augment the tones thereacross. The conductive transistors also act as a low resistance connected across the input resistor for the passage of the line holding current. The simulation circuit acts, in effect, as an inductance, without the use of inductive components. The input resistor is effectively connected, in series with two zener diodes, across the line, and the series circuit receives the line voltage and produces therefrom positive and negative power supplies for energizing the entire modem. No further power supply is necessary.

摘要翻译： 用于连接到传输线的调制解调器或其它数据处理装置包括用于提供低直流电压的电感模拟电路。 阻力允许线路流通，同时具有高的交流电流。 对线路上的音频数据音调分流阻抗。 模拟电路包括两个电阻器，通过电容器连接到调制解调器/线路耦合电路放大器中的输入电阻器上作为高增益放大器，放大器在输入电阻器两端施加音调信号，以增加其上的色调。 导电晶体管还用作连接在输入电阻器两端的低电阻，用于通过线路保持电流。 仿真电路实际上作为电感起作用，而不使用电感元件。 输入电阻器与两个齐纳二极管串联连接，并串联电路接收线路电压，从而产生用于激励整个调制解调器的正极和负极电源。 不需要进一步的电源。

公开(公告)号：US4572927A

公开(公告)日：1986-02-25

申请号：US473484

申请日：1983-03-09

申请人： John M. Huft

发明人： John M. Huft

IPC分类号： H03K17/64 ,  H04M19/08 ,  H04M3/00

CPC分类号： H04M19/08 ,  H03K17/64

摘要： A ring-ground circuit in a telephone system comprises a control transistor that selectively receives base drive from a microprocessor and that has its emitter connected through a low voltage LED and through the series combination of the base-emitter junction of a switching transistor and its emitter resistor to ground. The LED has a sharp transition in its conduction characteristics when the voltage across it reaches a predetermined value which is a reference voltage. Conduction of the control transistor provides base drive to the switching transistor for causing collector current in the latter to initiate a ground-start condition in a relay coil that is connected to a central office battery voltage. When current in the switching transistor increases to a prescribed value, that is set by the LED reference voltage and the emitter resistor, conduction of the switching transistor is automatically controlled for limiting the maximum value of its collector current.

摘要翻译： 电话系统中的环形接地电路包括控制晶体管，其选择性地接收来自微处理器的基极驱动器，并且其发射极通过低电压LED连接，并且通过开关晶体管的基极和发射极的串联组合 电阻接地。 当其两端的电压达到作为参考电压的预定值时，LED的导通特性具有急剧的转变。 控制晶体管的导通为开关晶体管提供基极驱动，使得后者中的集电极电流在连接到中心局电池电压的继电器线圈中启动接地启动状态。 当开关晶体管中的电流增加到由LED参考电压和发射极电阻设定的规定值时，自动控制开关晶体管的导通，以限制其集电极电流的最大值。

公开(公告)号：US4532382A

公开(公告)日：1985-07-30

申请号：US575369

申请日：1984-01-30

申请人： Karl E. Pommer, II

发明人： Karl E. Pommer, II

IPC分类号： H04M19/08 ,  H04M1/00 ,  H04M1/274

CPC分类号： H04M19/08

摘要： A power supply circuit for use in a subscriber's telephone that incorporates memory devices for use in repertory dialing, last number recall, and similar functions. This circuit interfaces with the telephone line to provide the data retention supply current needs of volatile static memory devices. It also interfaces with the power supply of the associated logic circuitry to supply the needed operating voltage.

摘要翻译： 一种用于用户电话中的电源电路，其包括用于电话拨号，最后号码召回和类似功能的存储器件。 该电路与电话线路连接，提供数据保持电源对易失性静态存储器件的需求。 它还与相关逻辑电路的电源连接，以提供所需的工作电压。

公开(公告)号：US4507525A

公开(公告)日：1985-03-26

申请号：US460874

申请日：1983-01-25

申请人： Marco Siligoni ,  Nazzareno Rossetti

发明人： Marco Siligoni ,  Nazzareno Rossetti

IPC分类号： H02M7/21 ,  H02M7/12 ,  H02M7/219 ,  H04M19/08 ,  H04M1/74

CPC分类号： H02M7/219 ,  H04M19/08 ,  H02M2007/2195 ,  Y02B70/1408

摘要： A transistorized bridge rectifier circuit with overcurrent protection which can be integrated monolithically is used for joining to a two-wire telephone line to the electronic circuits of a telephone subscriber set connected thereto. The circuit includes a transistorized bridge having a circuit arranged in the manner of a Graetz bridge. Rather than using separate elements for overcurrent protection, the circuit uses the bridge circuit elements themselves as protection elements. Diodes or diode connected transistors are respectively connected between the base and collector of transistors in two arms of the Graetz bridge and the resultant circuit thus provides overcurrent protection without the need of additional protection elements.

摘要翻译： 具有过电流保护的晶体管桥式整流电路可以单片集成，用于将两线电话线连接到与其连接的电话用户机的电子电路。 该电路包括一个晶体管桥，其具有以Graetz桥的方式布置的电路。 电路不是使用单独的元件来实现过流保护，而是将桥式电路元件本身用作保护元件。 二极管或二极管连接的晶体管分别连接在Graetz电桥的两个臂中的晶体管的基极和集电极之间，因此得到的电路提供过流保护，而不需要额外的保护元件。

公开(公告)号：US4501933A

公开(公告)日：1985-02-26

申请号：US393088

申请日：1982-06-28

申请人： Marco Siligoni ,  Nazareno Rossetti

发明人： Marco Siligoni ,  Nazareno Rossetti

IPC分类号： H04M1/00 ,  H02M7/219 ,  H04M19/08 ,  H04M1/74

CPC分类号： H04M19/08 ,  H02M7/219 ,  H02M2007/2195 ,  Y02B70/1408

摘要： A transistor bridge rectifier circuit, which is capable of being monolithically integrated, is designed to connect the electronic circuits in a user's telephone set to a two-wire telephone line. The circuit includes a transistor bridge with a "Graetz bridge" circuit arrangement, a current generator, a pair of current mirror circuits connected thereto, which alternately conduct according to the polarity of the line, and a pair of controlled current gain transistors, each controlled by the output of one of the two current mirror circuits. The transistors belonging to the opposite sides of the bridge, the bases of which are respectively connected to the emitter and collector of the same controlled current gain transistor, are biased with the same base current which flows through the controlled current gain transistor.

摘要翻译： 能够单片集成的晶体管桥式整流电路被设计成将用户电话机中的电子电路连接到双线电话线。 该电路包括具有“Graetz桥”电路布置的晶体管桥，电流发生器，连接到其上的一对电流镜电路，其根据线极性交替导电，以及一对受控电流增益晶体管，每个受控电流增益晶体管被控制 通过两个电流镜电路之一的输出。 属于桥的相对侧的晶体管的基极分别连接到相同受控电流增益晶体管的发射极和集电极，并以相同的基极电流偏置，该基极电流流过受控电流增益晶体管。

公开(公告)号：US4488006A

公开(公告)日：1984-12-11

申请号：US394112

申请日：1982-07-01

申请人： Terrence L. Essig ,  Donald D. Huizinga ,  Donald R. Means

发明人： Terrence L. Essig ,  Donald D. Huizinga ,  Donald R. Means

IPC分类号： H04M19/08 ,  H04M1/00

CPC分类号： H04M19/08

摘要： The present apparatus for controlling the application of telephone line power in a telephone set has obviated the requirement for a local source of power at the premises of a telephone customer. A data processor-based telephone set incorporating the present invention comprises a power supply having first and second voltage storage devices (C401, C402) which accumulate charge from the telephone line. First and second regulator circuits (410, 420) regulate the charging of the voltage storage devices and the power distribution to power-consumptive components of the telephone set during on-hook and off-hook switchhook conditions. A voltage threshold detector (301) actuates a power-down of power consumptive components including the data processor (210) when the power supply voltage falls below a particular threshold value. In the meantime, power is continuously provided to certain essential components such as the volatile memory (220) of the data processor. A telephone impedance switch (202) under data processor control intentionally increases the resistance of the telephone set so that the telephone line voltage delivered to the telephone set is increased, the increased voltage powering certain components of the telephone which require the higher voltage level for proper operation.

摘要翻译： 用于控制电话机中电话线电源的应用的本装置已经消除了对电话客户的房屋处的本地电源的要求。 结合本发明的基于数据处理器的电话机包括具有从电话线累积电荷的第一和第二电压存储装置（C401，C402）的电源。 第一和第二调节器电路（410,420）在挂机和摘机切换挂钩条件期间调节电压存储装置的充电和对电话机的功耗部件的功率分配。 当电源电压低于特定阈值时，电压阈值检测器（301）致动包括数据处理器（210）的功耗组件的掉电。 同时，将功率持续提供给某些基本组件，例如数据处理器的易失性存储器（220）。 在数据处理器控制下的电话阻抗开关（202）有意地增加电话机的电阻，使得传送到电话机的电话线电压增加，为电话的某些组件提供电压，这些电压需要较高的电压电平以适当 操作。

公开(公告)号：US4458111A

公开(公告)日：1984-07-03

申请号：US341242

申请日：1982-01-21

申请人： Mayumi Sugihara

发明人： Mayumi Sugihara

IPC分类号： H02J7/00 ,  H04M1/00 ,  H04M19/08 ,  H04Q7/38 ,  H04M1/02

CPC分类号： H04M19/08 ,  H02J7/0068

摘要： A charge-discharge switching circuit for use in a cordless telephone which automatically connects and disconnects the receiver and transmitter circuits from a rechargeable storage battery in the handset in response to the base unit charger signal so that the transmitter and receiver circuits are disconnected from the storage battery when it is being charged by the charger in the base unit of the cordless telephone.

摘要翻译： 一种用于无绳电话的充放电切换电路，其响应于基本单元充电器信号自动地将接收器和发射器电路与手持机中的可再充电蓄电池连接并断开，使得发射器和接收器电路与存储器断开连接 当电池被无绳电话的基座中的充电器充电时。

公开(公告)号：US4417099A

公开(公告)日：1983-11-22

申请号：US203110

申请日：1980-11-03

申请人： O. Leon Pierce

发明人： O. Leon Pierce

IPC分类号： H03K17/795 ,  H04L25/26 ,  H04M19/08 ,  H03K3/42

CPC分类号： H03K17/7955 ,  H04L25/26 ,  H04M19/08

摘要： An electro-optical isolator circuit especially adapted for operation in a modem which is powered solely from the telephone line and employed to isolate the line from utilization equipment. The isolator includes a guard circuit which substantially improves low current operating speed such that an inexpensive electro-optical component can be utilized at very low drive levels to achieve response times less than 10 microseconds.

摘要翻译： 一种电光隔离器电路，特别适用于调制解调器中的操作，该调制解调器仅由电话线供电并用于将线路与利用设备隔离。 隔离器包括保护电路，其大大改善了低电流操作速度，使得可以以非常低的驱动电平利用廉价的电光部件来实现小于10微秒的响应时间。

公开(公告)号：US4380687A

公开(公告)日：1983-04-19

申请号：US248129

申请日：1981-03-27

申请人： James A. Stewart

发明人： James A. Stewart

IPC分类号： H04M19/08 ,  H04M19/06

CPC分类号： H04M19/08 ,  Y10S320/13 ,  Y10S320/36

摘要： A control circuit 16 that is responsive to voltage conditions on a cable pair transmission line for selectively disabling a battey charging circuit 12 operating off of line current comprises a resistor R5 and storage capacitor C2 connected in series across the line; a timing capacitor C1 connected between the cathode of a PUT (programmable unijunction transistor) and one wire 32 of the line; and a zener diode D1 between the PUT anode and one wire 32 for establishing a conduction threshold for the PUT. The resistor R5 and primary conduction path of a first bipolar transistor Q2, having its base connected to the PUT anode, are connected in series between the other wire 33 of the line and the charging circuit so that startup current for the charging circuit may be used for charging C2 when the charging circuit is disabled. Means is also included for driving the PUT gate voltage low and turning on the PUT in response to both high and low voltage conditions on the line. This dumps the C2 charge into C1, the latter discharing slowly for holding the charging circuit diasabled. A second bipolar transistor Q4 senses the charge voltage on C1 for decreasing the PUT gate voltage when the PUT conducts and for increasing the PUT gate voltage immediately prior to the control circuit enabling the charging circuit to draw line current in order to prevent on-off cycling of the latter on a long cable pair.

摘要翻译： 响应于电缆对传输线上的电压条件的控制电路16，用于选择性地禁用线路电流运行的电池充电电路12包括串联连接的电阻器R5和存储电容器C2; 连接在PUT（可编程单结晶体管）的阴极和线路的一根线32之间的定时电容器C1; 以及PUT阳极和一根导线32之间的齐纳二极管D1，用于建立PUT的导通阈值。 电阻器R5和其基极连接到PUT阳极的第一双极晶体管Q2的一次导通路径串联连接在线路的另一导线33和充电电路之间，使得可以使用充电电路的启动电流 用于对充电电路进行充电C2。 还包括用于将PUT栅极电压驱动为低电平并且响应于线路上的高电压和低电压条件而导通PUT的装置。 这将C2电荷转化为C1，后者缓慢地将充电电路保持在正常状态。 第二双极晶体管Q4感测C1上的充电电压，用于当PUT导通时降低PUT栅极电压，并且在控制电路之前立即增加PUT栅极电压，使得充电电路能够绘制线电流，以防止开关循环 后者在长电缆对上。