专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP1435712A1 Transmitter for transmitting a shape-controlled signal over a communication line 有权
标题翻译：发射机，用于通过通信线路传送与受控波形的信号
公开(公告)号：EP1435712A1
公开(公告)日：2004-07-07
申请号：EP02293270.1
申请日：2002-12-31
申请人： Motorola Inc.
发明人： Sicard, Thierry
IPC分类号： H04L25/02 , H03K4/02
CPC分类号： H04L25/03834 , H03K4/502 , H03K4/92 , H04L25/085
摘要： A transmitter (4) for a controlled-shape switched signal on a communication line (1) comprises a signal generator including a capacitor (19) and a feedback loop responsive to a voltage across the capacitor (19) and to an input signal (TX) for supplying a shaped current ( I S ) for charging the capacitor (19) so as to define an edge of the switched signal. Signal producing means (9, 21) in the signal generator is responsive to the capacitor voltage for applying the controlled-shape switched signal to the line. The signal generator includes an amplifier (49) having an input terminal and an output terminal across which the capacitor means (19) is connected and at which it generates an amplifier output voltage ( V O ).
The feedback loop is arranged to maintain a minimum value of the shaped current ( I S ) at least in steady state conditions of the input signal (TX). The signal generator comprises first and second current diversion means (52, 53) operative at least in the steady state conditions in response to relative magnitudes of the amplifier output voltage ( V O ) and first and second limit voltages respectively for controlling supply of charging current ( I c ) to the amplifier and the capacitor (19) so as to tend to reduce charging and discharging of the capacitor means (19) in the steady state conditions and to maintain a steady state magnitude of the amplifier output voltage ( V O ) even against fluctuations induced by electromagnetic perturbations on the communication line.
摘要翻译：一种用于受控形状发射机（4）接通通信线路信号（1）包括一个信号发生器，其包括一个电容器（19），并且响应于在电容器（19）的电压的反馈环路，并在输入信号（TX ）用于供应字型的电流（IS）进行充电的电容器（19），以便在切换信号的边缘，以限定。信号产生装置（9，21）中的信号发生器响应于用于施加受控形状电容器电压切换信号到线路。该信号发生器包括具有放大器（49）输入端与跨这意味着电容器（19）连接的输出端上，并在它放大器输出电压（VO）的代率。反馈回路被布置成保持所述成形电流（IS）的至少在输入信号（TX）的稳定状态条件的最小值。所述信号发生器包括第一和第二电流转向装置（52，53）操作以在响应于所述放大器的输出电压的相对大小（VO）和第一和第二限制电压的稳态条件下分别用于控制充电电流供给至少（ IC）给放大器和电容器（19），以便趋向于减小在稳定状态条件下，电容器装置（19）的充电和放电，并维持所述放大器输出电压（VO的稳态大小）甚至对波动由通信线路上的电磁干扰引起的。

2. 发明公开

EP1376294A1 Low drop-out voltage regulator and method 审中-公开
标题翻译： Spannungsregulierungsinrichtung mit kleiner Verlustspannung und Verfahren
公开(公告)号：EP1376294A1
公开(公告)日：2004-01-02
申请号：EP02291605.0
申请日：2002-06-28
申请人： MOTOROLA, INC.
发明人： Sicard, Thierry
IPC分类号： G05F1/575 , G05F1/565
CPC分类号： G05F1/575 , G05F1/565
摘要： A low drop-out voltage regulator (300) and method comprising: a differential transistor arrangement (Q1-Q2) for receiving a reference voltage and in dependence thereon producing a regulated output voltage; an output stage (Q3) for coupling to a load; and a control loop (310) coupled to the differential transistor arrangement for providing a dominant pole. Since a load capacitance is not used for dominant pole, stability of operation may be obtained with a lower load capacitance. The output stage is preferably a closed-loop unity gain amplifier providing a low impedance output.
This provides the following advantages:

1 - The output capacitor can be dramatically reduced or removed (a low dominant pole, allows the regulator to work with 0nF output capacitor).
2 - internal power consumption can be reduced, improving regulator efficiency.
3 - Low output impedance is provided, with very low DC output resistance.
4 - The load capacitor can have zero ESR (equivalent serial resistance).
摘要翻译：一种低压差稳压器（300）和方法，包括：用于接收参考电压并依赖于其产生调节输出电压的差分晶体管布置（Q1-Q2）; 用于耦合到负载的输出级（Q3）以及耦合到差分晶体管装置的控制回路（310），用于提供主导极。由于负载电容不用于主极，因此可以通过较低的负载电容来获得操作的稳定性。输出级优选地是提供低阻抗输出的闭环单位增益放大器。这提供了以下优点：1 - 输出电容可以大大减少或消除（低主导极，允许调节器与0nF输出电容一起使用）。 2 - 可以降低内部功耗，提高调压器的效率。 3 - 提供低输出阻抗，具有非常低的直流输出电阻。 4 - 负载电容可以具有零ESR（等效串联电阻）。

3. 发明公开

EP1416632A1 Circuit for generating a pulse-shaped signal for a communication line 审中-公开
标题翻译： Schaltung zum Erzeugen einesimpulsförmigenSignalsfüreineNachrichtenübertragungsstrecke
公开(公告)号：EP1416632A1
公开(公告)日：2004-05-06
申请号：EP02292729.7
申请日：2002-10-31
申请人： Motorola Inc.
发明人： Sicard, Thierry
IPC分类号： H03K4/02
CPC分类号： H04L25/0286 , H03K4/00 , H03K4/502 , H03K4/92 , H04L25/0282 , H04L25/03834 , H04L25/03878
摘要： A transmitter (4) for a controlled-shape switched signal on a communication line (1) comprises a signal generator including a capacitor (19) producing the switched signal to be applied to the line. The capacitor is charged by a charging current (I c ) in response to an input signal (TX) so as to define an edge of the switched signal. The charging means (24, 25) comprises a feedback loop responsive to the capacitor voltage (V O ) for generating a feedback current (I E ) having a continuous magnitude that is a progressive function of the capacitor voltage, the charging current (I c ) being a function of the feedback current (I E ). Resistors (R; R 1 , R 2 ) define an RC circuit with the capacitor (19) enabling the time constant of the feedback current to be controlled.
Preferably, the feedback loop generates first and second feedback voltages (V H , V L ) one of which is a rising function of the capacitor voltage (V O ) and the other is a falling function of the capacitor voltage (V O ). The feedback current (I E ) is generated first as a function of one of the feedback voltages (V H , V L ) and subsequently as a function of the other of the feedback voltages, so that the rate of change of the feedback current (I E ) increases with time while the one of the feedback voltages is selected and decreases with time while the other of the feedback voltages is selected.
Preferably, the rate of change of the feedback current (I E ) is a function of the capacitor voltage (V O ) such that the capacitor voltage varies substantially as an exponential function of time, at least for a part of the edge of the switched signal (40, 42, 44, 46) and may be a linear function of time for another part (41, 43, 45) so as to approximate closely a sinusoidal half cycle with few harmonics.
摘要翻译：发射器（4）具有反馈电流发生器（24）和充电电流发生器（25），该充电电流发生器（25）包括响应于电容器电压（VO）的反馈回路，用于产生具有连续幅度的反馈电流（IE）电容电压的功能。提供给电容器（19）的充电电流是反馈电流的函数。电容器包括在信号发生器中，该信号发生器还包括响应于电容器两端的电容器电压的信号产生单元（9），用于在通信线路上施加开关信号。反馈电流发生器和充电电流发生器响应用于向电容器提供充电电流的输入信号（TX），以便限定开关信号的边沿。

4. 发明公开

EP1404078A1 Receiver for a switched signal on a communication line 审中-公开
标题翻译： Empfängerfürein geschaltetes信号übereine Kommunikationsleitung
公开(公告)号：EP1404078A1
公开(公告)日：2004-03-31
申请号：EP02292355.1
申请日：2002-09-25
申请人： MOTOROLA, INC.
发明人： Sicard, Thierry
IPC分类号： H04L25/02
CPC分类号： H04L25/0292 , H04L25/0272 , H04L25/0294
摘要： A receiver for receiving a switched signal on a communication line (1), such as a LIN bus, the signal varying between first and second voltage levels ( V SUP , ground). The receiver comprises a comparator responsive to the relative values of the received signal voltage level ( V LIN ) and an input reference voltage level ( V SUP . The comparator comprises a current generator (22,23) selectively operable when the received signal is asserted to produce an input current ( I IN ) which is a function of the received signal voltage level ( V LIN ) and a reference current ( I SUP ) which is a function of the input reference voltage level ( V SUP ), and output means (28,32,31) responsive to the relative values of the input current ( I IN ) and the reference current ( I SUP ). The output means (28,32,31) is supplied with power at a voltage ( V DD ) substantially lower than the difference between the first and second voltage levels ( V SUP , ground). A switch (26,35) responsive to the input current ( I IN ) reduces the power consumption of the comparator when the received signal is de-asserted.
摘要翻译：当接收到的信号被断言以产生输入电流和参考电流时，接收机具有一个具有电流发生器（22,23）的比较器（31）。当信号被取消断言时，比较器中的开关（35）响应于输入电流。响应于相对电流值的输出单元以低于参考电压和接地电压之间的差的电压供电。

5. 发明公开

EP1271549A1 Eeprom circuit, voltage reference circuit and method for providing a low temperature-coefficient voltage reference 有权
标题翻译： EEPROM电路，电压基准电路和方法，用于采购的电压参考具有低温度系数
公开(公告)号：EP1271549A1
公开(公告)日：2003-01-02
申请号：EP01401682.8
申请日：2001-06-26
申请人： MOTOROLA, INC.
发明人： Carman, Eric Scott , Sicard, Thierry
IPC分类号： G11C16/04 , G11C27/00
CPC分类号： G11C7/04 , G11C16/0441 , G11C27/005
摘要： A voltage reference circuit (40) is provided for producing a low temperature-coefficient analogue trim value. A pair of EEPROMs (50 and 60) are arranged such that the trim value is the difference between two EEPROM transistor threshold voltages. The substantially temperature dependent components of threshold voltage cancel out leaving only the substantially temperature independent trim value. Therefore the temperature coefficient of the voltage reference circuit (40) is negligible.
摘要翻译：电压参考电路（40）被提供用于生产低温度系数的模拟调整值。一对的EEPROM（50和60）的被检查布置所做的调整值是二EEPROM晶体管的阈值电压之间的差。阈值电压的温度基本上依赖部件抵消，只留下温度基本上独立调整值。因此电压参考电路（40）的温度系数是可以忽略的。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式