公开(公告)号：US4293824A

公开(公告)日：1981-10-06

申请号：US90619

申请日：1979-11-02

申请人： Bruno Murari ,  Marco Siligoni

发明人： Bruno Murari ,  Marco Siligoni

IPC分类号： H03F3/45 ,  H03F3/04

CPC分类号： H03F3/45094 ,  H03F2203/45028 ,  H03F2203/45308 ,  H03F2203/45612

摘要： A linear differential amplifier comprises two main transistors of one conductivity type (e.g. PNP) having emitters connected via a common constant-current generator to an ungrounded terminal of a d-c supply whose grounded other terminal is connected to their collectors via a pair of identical resistors; the base of one of these transistors is grounded while the base of the other transistor receives an a-c input signal. An unbalanced output signal is taken off the collector of an ancillary transistor of the opposite conductivity type (NPN) which is fed from the ungrounded supply terminal through a complementary auxiliary transistor or through another constant-current generator; the emitter of this output transistor is connected directly to the collector of the second main transistor.

摘要翻译： 线性差分放大器包括具有一个导电类型（例如PNP）的两个主晶体管，其具有通过公共恒流发生器连接到d-c电源的未接地端子的发射极，其接地另一个端子经由一对相同的电阻器连接到它们的集电极; 这些晶体管之一的基极接地，而另一晶体管的基极接收a-c输入信号。 不平衡输出信号从相对导电类型（NPN）的辅助晶体管的集电极中取出，其由未接地的电源端子通过互补辅助晶体管或通过另一恒流发生器馈送; 该输出晶体管的发射极直接连接到第二主晶体管的集电极。

公开(公告)号：US4979008A

公开(公告)日：1990-12-18

申请号：US298651

申请日：1989-01-18

申请人： Marco Siligoni ,  Flavio Villa

发明人： Marco Siligoni ,  Flavio Villa

IPC分类号： H01L21/331 ,  H01L21/8222 ,  H01L27/06 ,  H01L29/08 ,  H01L29/73 ,  H01L29/732

CPC分类号： H01L29/7302 ,  H01L29/0826 ,  H01L29/7322 ,  Y10S257/914 ,  Y10S257/918

摘要： A vertical, isolated-collector transistor of the pnp type comprises an island doped similarly to the collector region and formed in the surface epitaxial layer of the transistor between that collector region and one of the isolation zones. That island extends in depth to penetrate a similarly doped intermediate region and short out the epitaxial layer included between the isolating layer and the collector region so as to suppress the effects of active parasitic junction components by holding a transistor and a silicon-controlled rectifier of parasitic types, as nesting within the structure of the vertical pnp transistor, in a cut-off state.

公开(公告)号：US4835490A

公开(公告)日：1989-05-30

申请号：US178556

申请日：1988-04-07

申请人： Michelangelo Mazzucco ,  Vanni Poletto ,  Marco Siligoni

发明人： Michelangelo Mazzucco ,  Vanni Poletto ,  Marco Siligoni

IPC分类号： H03G9/00 ,  H03F1/30 ,  H03F3/45 ,  H03G1/04 ,  H03G5/18

CPC分类号： H03G1/04 ,  H03G5/18

摘要： A circuit for automatically controlling the gain-bandwidth product of operation amplifiers, where gain-bandwidth product (G*B) of one of the amplifiers placed on the same chip as the amplifiers to be controlled is measured and the resulting signal is used to control through a bias circuit the gain-bandwidth products of all the amplifiers, the value of these products being presettable through the frequency of a control signal sent to the circuit input. The reference amplifier is highly compensated for and placed in the configuration of voltage follower.

公开(公告)号：US4677664A

公开(公告)日：1987-06-30

申请号：US673527

申请日：1984-11-21

申请人： Marco Siligoni ,  Vanni Saviotti

发明人： Marco Siligoni ,  Vanni Saviotti

IPC分类号： H04M3/06 ,  H04M19/02 ,  H04M3/02

CPC分类号： H04M19/026

摘要： A telephone circuit for ring trip detection that can be monolithically integrated, includes a current transducer coupled to a user's telephone line, and an integrator circuit. The output current of the current transducer is proportional to the line current until equal and opposite threshold values are reached. When the line current threshold values are exceeded, the transducer output current is constant. The transducer output current is integrated by the integrator circuit over at least one complete cycle. When a telephone headset is removed, a direct current is applied to the ringing signal current resulting in asymmetry in the half-cycles of the transducer output current. The asymmetry provides a non-zero integrated current for a complete cycle. When the integrated value of the asymmetrical current is greater than a selected value, a signal is applied to the ringing circuit, halting the ringing signal.

摘要翻译： 可以单片集成的用于环路跳闸检测的电话电路包括耦合到用户电话线的电流传感器和积分器电路。 电流传感器的输出电流与线路电流成比例，直到达到等于和相反的阈值。 当超过线路电流阈值时，传感器的输出电流是恒定的。 传感器输出电流由积分器电路在至少一个完整的周期内积分。 当电话耳机被去除时，直流电流被施加到振铃信号电流，导致换能器输出电流的半周期的不对称性。 不对称性为整个循环提供非零积分电流。 当非对称电流的积分值大于所选值时，将信号施加到振铃电路，停止振铃信号。

公开(公告)号：US4841565A

公开(公告)日：1989-06-20

申请号：US857487

申请日：1986-04-30

申请人： Marco Siligoni ,  Vanni Saviotti ,  Emilio Lorena

发明人： Marco Siligoni ,  Vanni Saviotti ,  Emilio Lorena

IPC分类号： H04Q3/42 ,  H04M19/00

CPC分类号： H04M19/005

摘要： A telephone circuit, which may be monolithically integrated, for feeding a subscriber's telephone line which is coupled via the circuit to a supply voltage generator. The circuit supplies the line with an impedance having a first predetermined value up to a given value of the line current, beyond which is supplies the line with an impedance of a second value greater than the first. The circuit is electrically equivalent to a voltage generator, identical to the supply voltage generator, having circuit components solely of the resistive type connected in series therewith.

摘要翻译： 可以单片集成的电话电路，用于馈送经由电路耦合到电源电压发生器的用户电话线。 电路向线路提供具有直到线电流的给定值的第一预定值的阻抗，超过该线路的线路具有大于第一值的第二值的阻抗。 该电路电气等效于与电源电压发生器相同的电压发生器，其具有仅与串联连接的电阻型的电路部件。

公开(公告)号：US4668907A

公开(公告)日：1987-05-26

申请号：US806797

申请日：1985-12-09

申请人： Marco Siligoni ,  Ferdinando Lari

发明人： Marco Siligoni ,  Ferdinando Lari

IPC分类号： G01R19/10 ,  G06G7/14 ,  H03F3/34 ,  H03F3/343 ,  G05F3/10

CPC分类号： G06G7/14

摘要： A monolithically integratable current adding circuit includes a current mirror circuit, the input port of which forms a first input terminal of an adding circuit and the output port of which is connected, via two series connected resistors, to a voltage reference. The point of connection between these series connected resistors forms a second input terminal of the adding circuit. The adding circuit also includes a voltage to current converter which has a first and second input terminal connected respectively to the output port of the current mirror circuit and to the voltage reference and which has an output terminal which forms the output terminal of the adding circuit.

摘要翻译： 单片可积分电流相加电路包括电流镜电路，其输入端口形成加法电路的第一输入端，其输出端经由两个串联的电阻器连接到电压基准。 这些串联电阻之间的连接点构成加法电路的第二输入端。 加法电路还包括电压 - 电流转换器，其具有分别连接到电流镜电路的输出端口和电压基准的第一和第二输入端子，并且具有形成加法电路的输出端子的输出端子。

公开(公告)号：US4661780A

公开(公告)日：1987-04-28

申请号：US612486

申请日：1984-05-21

申请人： Marco Siligoni ,  Bruno Murari

发明人： Marco Siligoni ,  Bruno Murari

IPC分类号： H03F3/45 ,  H03G1/00 ,  H03H11/04

CPC分类号： H03F3/45094 ,  H03G1/0023 ,  H03H11/04

摘要： Differential stage comprising a high input dynamic range differential circuit formed by first and second transistors whose emitter electrodes are connected together and to a constant current source through respective resistors, their base electrodes having an input signal applied thereto, and their collector electrodes supplying respective collector currents. The stage further comprises a dual-single converter circuit receiving the collector currents at its input and supplying a stage output current, said converter circuit including at least one variable current source and having a conversion factor which varies as a function of the variable source current.

摘要翻译： 差分级包括由发射电极连接在一起的第一和第二晶体管形成的高输入动态范围差分电路和通过相应电阻器的恒定电流源，它们的基极具有施加的输入信号，并且它们的集电极提供相应的集电极电流 。 该级还包括双输入转换器电路，其在其输入处接收集电极电流并提供级输出电流，所述转换器电路包括至少一个可变电流源并具有作为可变源电流的函数而变化的转换因子。

公开(公告)号：US5519775A

公开(公告)日：1996-05-21

申请号：US306243

申请日：1994-09-14

申请人： Paolo Lagana ,  Mauro Pasetti ,  Marco Siligoni

发明人： Paolo Lagana ,  Mauro Pasetti ,  Marco Siligoni

IPC分类号： H04M3/18 ,  H04M19/00

CPC分类号： H04M3/18 ,  H04M19/001

摘要： A protection device, for a telephone (or other load) 27 in series with an external protection transistor 2, includes a sensor 6 for detecting common-mode current into the load. The output of the sensor 6 is connected to affect a current source/sink combination, and imbalance in this source/sink combination produces a voltage shift which is indirectly connected to control the protection transistor.

摘要翻译： 用于与外部保护晶体管2串联的电话（或其他负载）27的保护装置包括用于检测进入负载的共模电流的传感器6。 连接传感器6的输出以影响电流源/吸收组合，并且该源/吸收组合中的不平衡产生间接连接以控制保护晶体管的电压偏移。

公开(公告)号：US4897872A

公开(公告)日：1990-01-30

申请号：US291297

申请日：1988-12-28

申请人： Marco Siligoni ,  Emilio Lorena

发明人： Marco Siligoni ,  Emilio Lorena

IPC分类号： H04M19/00

CPC分类号： H04M19/001

摘要： An interface circuit between a subscriber's telephone line and exchange control components, with a reduced current consumption in the case of a grounded cable, includes a control circuit which senses the increase in the amplitude of the longitudinal currents on the line due to the grounded cable condition and consequently controls the disconnection of the current supplied to the line. However, the line is still supplied periodically for very short periods so as to reduce as far as possible current consumption during the grounded cable condition, but to allow the control circuit to sense the removal of the breakdown and to restore the normal current supplied to the line.

公开(公告)号：US4847896A

公开(公告)日：1989-07-11

申请号：US120311

申请日：1987-11-13

申请人： Marco Siligoni ,  Vanni Saviotti ,  Jean-Louis Lavoisard

发明人： Marco Siligoni ,  Vanni Saviotti ,  Jean-Louis Lavoisard

IPC分类号： H04M3/02 ,  H04M19/02

CPC分类号： H04M19/026

摘要： A telephone circuit, which may be monolithically integrated, for supplying ringing signals to a subscriber's telephone line and for detecting an off the hook condition during ringing, including a logic control circuit connected to exchange components which control the supply of the ringing signals and determine their rhythm. The logic control circuit is connected to a circuit for detecting direct current on the line and a current comparator for generating a signal when the value of the line current exceeds a predetermined current value. This signal is also supplied to the exchange components via a transfer circuit to inform them that an off the hook condition has taken place. The logic control circuit is connected to a timing signal generator which synchronizes its functions with times in which the ringing signal has a zero amplitude, and is connected to a signal amplifier circuit which supplies the ringing signals to the line and to the transfer circuit. When the circuit for the detection of direct current signals a probable off the hook condition, the logic control circuit disables the amplifier circuit from supplying ringing signals to the line and inhibits the transfer of any signals to the exchange components, and checks after a predetermined time interval that an off the hook condition has actually taken place.

摘要翻译： 可以单片地集成的电话电路，用于向用户的电话线提供振铃信号，并用于在振铃期间检测关闭状态，包括连接到交换控制提供振铃信号的组件的逻辑控制电路，并确定它们 韵律。 逻辑控制电路连接到用于检测线路上的直流电流的电路和用于当线路电流的值超过预定电流值时产生信号的电流比较器。 该信号也经由传送电路提供给交换机组件，以通知他们已经发生了脱钩状态。 逻辑控制电路连接到定时信号发生器，其将其功能与振铃信号具有零幅度的时间同步，并且连接到信号放大器电路，该信号放大器电路将振铃信号提供给线路和传送电路。 当用于检测直流信号的电路可能脱钩状态时，逻辑控制电路禁止放大器电路向线路提供振铃信号，并禁止将任何信号传送到交换部件，并在预定时间后进行检查 实际发生脱钩状态的间隔。