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11. 发明授权

US06292033B1 Precision, low-power transimpedance circuit with differential current sense inputs and single ended voltage output 有权
标题翻译：具有差分电流检测输入和单端电压输出的精密，低功耗跨阻电路
公开(公告)号：US06292033B1
公开(公告)日：2001-09-18
申请号：US09686506
申请日：2000-10-11
申请人： Leonel Ernesto Enriquez
发明人： Leonel Ernesto Enriquez
IPC分类号： H03K5153
CPC分类号： H03F3/45085 , H03F2203/45392 , H03F2203/45574 , H03F2203/45604 , H03F2203/45624 , H03F2203/45641
摘要： A transimpedance circuit adapted for use in a subscriber line interface circuit includes sense resistors installed in closed loop, negative feedback paths of respective sense amplifiers. Voltage drops across the sense resistors are applied to first and second differential coupling circuits for applying differential currents to complementary polarity inputs of an operational amplifier. The inputs of the amplifier are also coupled to a linearity compensator, that is configured to provide sufficient overhead voltages in the presence of worst case voltage swing conditions. The compensator has a differential amplifier configuration, that closes a negative feedback loop from the output of the amplifier and one of its inputs, relative to a reference voltage balancing path coupled to the amplifier's other (complementary) input. The balanced differential configuration forces corresponding terminals of a pair of load resistors coupled to the inputs of the operational amplifier to the same potential, irrespective of variations in the input currents.
摘要翻译：适用于用户线接口电路的跨阻电路包括安装在闭环的感测电阻器，各个感测放大器的负反馈路径。感测电阻器两端的电压降被施加到第一和第二差分耦合电路，以将运算放大器的互补极性输入端施加差分电流。放大器的输入也耦合到线性补偿器，其被配置为在存在最坏情况的电压摆幅条件的情况下提供足够的架空电压。补偿器具有差分放大器配置，其相对于耦合到放大器的另一（互补）输入的参考电压平衡路径，从放大器的输出端和其输入端之一闭合负反馈回路。平衡差分配置迫使一对负载电阻器的相应端子耦合到运算放大器的输入到相同的电位，而与输入电流的变化无关。

12. 发明授权

US5649009A Differential longitudinal amplifier for a subscriber line interface circuit 失效
标题翻译：用于用户线接口电路的差分纵向放大器
公开(公告)号：US5649009A
公开(公告)日：1997-07-15
申请号：US340342
申请日：1994-11-14
申请人： Leonel Ernesto Enriquez , Gabriel Julio Uscategui
发明人： Leonel Ernesto Enriquez , Gabriel Julio Uscategui
IPC分类号： H04M19/00
CPC分类号： H04M19/005
摘要： A circuit and method for sensing and compensating for longitudinal (common mode) signals in a subscriber loop of a telephone system. The circuit and method may include a longitudinal amplifier for sensing a difference between a reference voltage, V.sub.BAT /2, and a longitudinal voltage in the subscriber loop, and for providing four currents, two to each of two current amplifiers in the telephone system subscriber line interface circuit (SLIC). The longitudinal amplifier includes two current mirrors, each for providing two currents of the same polarity and of the same magnitude. The magnitude of the difference between the two currents being provided to each of the current amplifiers is proportional to the voltage difference. When compensation of the longitudinal signals has been achieved, the two voltages are the same and the magnitudes of the four currents are the same.
摘要翻译：一种用于感测和补偿电话系统的用户环路中的纵向（共模）信号的电路和方法。电路和方法可以包括用于感测参考电压VBAT / 2和用户环路中的纵向电压之间的差的纵向放大器，并且用于提供四个电流，两个到电话系统用户线路中的两个电流放大器中的每一个接口电路（SLIC）。纵向放大器包括两个电流镜，每个用于提供相同极性和相同幅度的两个电流。提供给每个电流放大器的两个电流之间的差值的大小与电压差成比例。当实现纵向信号的补偿时，两个电压相同，四个电流的幅度相同。

13. 发明授权

US07130414B2 Active mode line voltage regulator for ringing subscriber line interface circuit 有权
公开(公告)号：US07130414B2
公开(公告)日：2006-10-31
申请号：US10090291
申请日：2002-03-04
申请人： Leonel Ernesto Enriquez , Douglas Youngblood
发明人： Leonel Ernesto Enriquez , Douglas Youngblood
IPC分类号： H04M19/00
CPC分类号： H04M19/005 , H04M1/745
摘要： A voltage regulator circuit arrangement limits the DC voltage applied to a tip and ring amplifiers of a subscriber line interface circuit (SLIC), each of which has a first polarity input coupled to a first current flow path to which a DC input (battery) voltage is coupled. A first current source supplies a first current derived via a low pass filter path from that flowing through the first current flow path to a second polarity input node of the tip amplifier, while a second current source supplies a similarly low pass filter path-derived second current to a second polarity input node of the ring amplifier. A voltage regulator is coupled with the first current flow path and is operative to regulate the voltage at the first polarity inputs of the tip and ring amplifiers to a regulated voltage value Vreg, so that the magnitudes of the first and second currents are based upon the regulated voltage value Vreg.

14. 发明授权

US07003103B2 Mode-dependent, multiple bias-driven battery switch for subscriber line interface circuit 失效
公开(公告)号：US07003103B2
公开(公告)日：2006-02-21
申请号：US10177706
申请日：2002-06-21
申请人： Leonel Ernesto Enriquez , Douglas Youngblood
发明人： Leonel Ernesto Enriquez , Douglas Youngblood
IPC分类号： H04M1/00 , H04M9/00 , H04M9/08
CPC分类号： H04M1/7385 , H04M3/005 , H04M19/00
摘要： A mode-dependent, battery-coupling switch for a subscriber line interface circuit (SLIC) selectively adjusts its current requirements to provide optimal current handling capability irrespective of the mode of operation of the SLIC. Where current demands of the SLIC are relatively minimal (e.g., on-hook idle mode), the bias is set at a relatively small, default value. During high current demand, such as ringing and off-hook signaling, the bias is set at a relatively large value, to maintain a low voltage drop across the battery-coupling switch.

15. 发明授权

US06829353B1 Mechanism for preventing clipping of pulse metering signals in telephone line card channels 失效
标题翻译：防止电话线路卡通道中脉冲计量信号被削波的机制
公开(公告)号：US06829353B1
公开(公告)日：2004-12-07
申请号：US09686504
申请日：2000-10-11
申请人： Leonel Ernesto Enriquez
发明人： Leonel Ernesto Enriquez
IPC分类号： H04M100
CPC分类号： H04M9/08
摘要： A circuit arrangement prevents clipping of pulse metering (teletax) signals in a telephone line card channel that results from the differential impedance between a subscriber line interface circuit (SLIC) and the line at the frequency band of teletax signals. The circuit arrangement is configured to sense pulse metering signals through a delay circuit, which is coupled to a reflected signal cancellation circuit. The reflected signal cancellation circuit contains a transconductance amplifier circuit that generates a pair of complementary polarity output currents representative of the sensed teletax signal. One of these output currents is fed back to a programmed impedance element in the transmission channel path of the SLIC so as to effectively cancel the reflected teletax signal.
摘要翻译：一种电路装置可以防止电话线卡通道中的脉冲计量（teletax）信号的削波，这是由用户线路接口电路（SLIC）与电视信号的频带之间的线路之间的差分阻抗导致的。电路装置被配置为通过延迟电路感测脉冲计量信号，延迟电路耦合到反射信号消除电路。反射信号消除电路包含跨导放大器电路，其产生代表感测到的小电视信号的一对互补极性输出电流。这些输出电流中的一个反馈到SLIC的传输通道路径中的编程阻抗元件，以便有效地抵消反射的teletax信号。

16. 发明授权

US06507236B1 Multistage precision, low input/output overhead, low power, high output impedance and low crosstalk current mirror 失效
标题翻译：多级精度，低输入/输出开销，低功耗，高输出阻抗和低串扰电流镜
公开(公告)号：US06507236B1
公开(公告)日：2003-01-14
申请号：US09901259
申请日：2001-07-09
申请人： Leonel Ernesto Enriquez
发明人： Leonel Ernesto Enriquez
IPC分类号： G05F110
CPC分类号： G05F3/262
摘要： To mitigate against base current errors in a current mirror circuit having a low overhead supply voltage, a complementary polarity base current error reduction and auxiliary turn-on circuit provides an overhead voltage that enjoys a base-emitter diode drop improvement over a conventional circuit. The emitter area of an input stage's input current mirror transistor is used as a normalizing factor, and each output stage contains additional current circuitry that compensates for geometry differences of current mirror transistors, minimizing power dissipation and crosstalk. Emitter areas of input stage transistors are defined in accordance with current compensation relationships between the transistor circuits of the output stages and the input stage.
摘要翻译：为了减轻具有低开销电源电压的电流镜电路中的基极电流误差，互补极性基极电流误差减小和辅助导通电路提供了比常规电路具有基极 - 发射极二极管降压改进的架空电压。输入级输入电流镜晶体管的发射极面积用作归一化因子，每个输出级包含补偿电流镜晶体管的几何差异的附加电流电路，从而最小化功耗和串扰。根据输出级的晶体管电路与输入级之间的电流补偿关系来定义输入级晶体管的发射极区域。

17. 发明授权

US06469519B1 Precision loop voltage detector for subscriber line interface circuit applications 失效
标题翻译：用于用户线路接口电路应用的精密环路电压检测器
公开(公告)号：US06469519B1
公开(公告)日：2002-10-22
申请号：US09686324
申请日：2000-10-11
申请人： Leonel Ernesto Enriquez
发明人： Leonel Ernesto Enriquez
IPC分类号： G01R2320
CPC分类号： H04M3/2272 , G01R19/0084
摘要： A precision loop voltage measurement circuit outputs a voltage proportional to the differential voltage across a telephone wireline pair. This voltage is coupled to a tip-ring sense rectifier circuit having complementary transistor pairs coupled through a sense resistor to a node, which provides a current as of a composite of the tip-ring voltage and transistor voltage drops within the tip-ring sense rectifier circuit. A differential current extraction circuit generates a first current proportional to the sum of the tip-ring voltage plus voltage drops in the tip-ring sense rectifier circuit, and a second current fractionally proportional to only the internal voltage drops in the tip-ring sense rectifier circuit. The scaled currents are combined in an output resistor to produce a single ended output proportional to tip-ring voltage.
摘要翻译：精密回路电压测量电路输出与电话线对对上的差分电压成比例的电压。该电压耦合到具有通过检测电阻器耦合到节点的互补晶体管对的尖端环感测整流器电路，该节点提供尖端环路电压和尖端环路感测整流器内的晶体管电压降的复合电流电路。差分电流提取电路产生与尖端环感测整流电路中的尖端环电压加电压降之和成比例的第一电流，以及与仅尖端感测整流器中的内部电压降分数成正比的第二电流电路。缩放电流在输出电阻器中组合以产生与尖端环电压成比例的单端输出。

18. 发明授权

US5976944A Integrated circuit with thin film resistors and a method for co-patterning thin film resistors with different compositions 失效
标题翻译：具有薄膜电阻的集成电路和用于对具有不同组成的薄膜电阻器进行协同图案化的方法
公开(公告)号：US5976944A
公开(公告)日：1999-11-02
申请号：US799793
申请日：1997-02-12
申请人： Joseph Andre Czagas , George Bajor , Leonel Ernesto Enriquez
发明人： Joseph Andre Czagas , George Bajor , Leonel Ernesto Enriquez
IPC分类号： H01C17/08 , H01L21/02 , H01L21/822 , H01L27/01 , H01L27/04 , H01L21/20
CPC分类号： H01L28/24 , H01L27/016
摘要： FIG. 5b shows a first thin film resistor 14 formed by direct etching or lift off on a first dielectric layer 12 that covers an integrated circuit (not shown) in a silicon substrate 10. A patterned layer of photoresist covers a portion of the second thin film resistor material 30. The second thin film resistor material 30 is different from the first thin film resistor material 14. The exposed portion of the second thin film resistor material 30 is removed to leave first and second thin film resistors on the first dielectric layer 12.
摘要翻译：图。图5b示出了通过在覆盖硅衬底10中的集成电路（未示出）的第一电介质层12上直接蚀刻或剥离而形成的第一薄膜电阻器14.图案化的光致抗蚀剂层覆盖了第二薄膜电阻器的一部分材料30.第二薄膜电阻器材料30与第一薄膜电阻器材料14不同。去除第二薄膜电阻器材料30的暴露部分以在第一介电层12上留下第一和第二薄膜电阻器。

19. 再颁专利

USRE42237E1 Active mode line voltage regulator for ringing subscriber line interface circuit 失效
标题翻译：主动式线路稳压器，用于振铃用户线接口电路
公开(公告)号：USRE42237E1
公开(公告)日：2011-03-22
申请号：US12260697
申请日：2008-10-29
申请人： Leonel Ernesto Enriquez , Douglas Lawton Youngblood
发明人： Leonel Ernesto Enriquez , Douglas Lawton Youngblood
IPC分类号： H04M1/00
CPC分类号： H04M19/005 , H04M1/745
摘要： A voltage regulator circuit arrangement limits the DC voltage applied to a tip and ring amplifiers of a subscriber line interface circuit (SLIC), each of which has a first polarity input coupled to a first current flow path to which a DC input (battery) voltage is coupled. A first current source supplies a first current derived via a low pass filter path from that flowing through the first current flow path to a second polarity input node of the tip amplifier, while a second current source supplies a similarly low pass filter path-derived second current to a second polarity input node of the ring amplifier. A voltage regulator is coupled with the first current flow path and is operative to regulate the voltage at the first polarity inputs of the tip and ring amplifiers to a regulated voltage value Vreg, so that the magnitudes of the first and second currents are based upon the regulated voltage value Vreg.
摘要翻译：电压调节器电路装置限制施加到用户线路接口电路（SLIC）的尖端和环形放大器的DC电压，其中每一个具有耦合到第一电流流动路径的第一极性输入，DC输入（电池）电压被耦合。第一电流源将经由低通滤波器路径导出的第一电流从流过第一电流流动路径的第一电流提供给尖端放大器的第二极性输入节点，而第二电流源提供类似的低通滤波器路径导出的第二电流源电流到环形放大器的第二极性输入节点。电压调节器与第一电流流动路径耦合并且可操作以将尖端和环形放大器的第一极性输入处的电压调节到调节电压值Vreg，使得第一和第二电流的幅度基于调节电压值Vreg。

20. 发明授权

US07260103B2 Mode-dependent, multiple bias-driven battery switch for subscriber line interface circuit 失效
标题翻译：模式相关，用于用户线接口电路的多偏压驱动电池开关
公开(公告)号：US07260103B2
公开(公告)日：2007-08-21
申请号：US11295883
申请日：2005-12-07
申请人： Leonel Ernesto Enriquez , Douglas Youngblood
发明人： Leonel Ernesto Enriquez , Douglas Youngblood
IPC分类号： H04M1/00 , H04M9/00
CPC分类号： H04M1/7385 , H04M3/005 , H04M19/00
摘要： A mode-dependent, battery-coupling switch for a subscriber line interface circuit (SLIC) selectively adjusts its current requirements to provide optimal current handling capability irrespective of the mode of operation of the SLIC. Where current demands of the SLIC are relatively minimal (e.g., on-hook idle mode), the bias is set at a relatively small, default value. During high current demand, such as ringing and off-hook signaling, the bias is set at a relatively large value, to maintain a low voltage drop across the battery-coupling switch.
摘要翻译：用于用户线接口电路（SLIC）的模式相关的电池耦合开关选择性地调整其当前要求以提供最佳的电流处理能力，而与SLIC的操作模式无关。在SLIC的当前需求相对较小（例如，挂机空闲模式）的情况下，偏置被设置为相对较小的默认值。在高电流需求（例如振铃和摘机信号）期间，将偏压设置在相对较大的值，以保持电池耦合开关两端的低压降。

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