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31. 发明授权

US5583442A Differential voltage monitor using a bridge circuit with resistors on and off of an integrated circuit 失效
标题翻译：差分电压监测器采用桥接电路，其电阻为集成电路的开/关
公开(公告)号：US5583442A
公开(公告)日：1996-12-10
申请号：US192398
申请日：1994-02-03
申请人： Robert H. Isham , Stanley F. Wietecha
发明人： Robert H. Isham , Stanley F. Wietecha
IPC分类号： G01R1/20 , G01R19/10 , G01R17/00
CPC分类号： G01R1/203 , G01R19/10
摘要： A differential voltage monitor is shown using a resistive bridge to produce a sample value representing that differential voltage. A portion of the resistive bridge is located on an IC and a portion is external to the IC. The object is to compare the differential voltage with a reference, producing a logic signal at a threshold level. The threshold level serving as a reference and the sample valve representing the differential voltage are made to be equally dependent on the bridge components located on the IC. In this way, any changes in the IC located bridge resistors compared to the bridge resistors located outside the IC are prevented from affecting the measurement.
摘要翻译：示出了使用电阻电桥产生代表该差分电压的采样值的差分电压监视器。电阻桥的一部分位于IC上，部分位于IC的外部。目的是将差分电压与参考值进行比较，产生阈值电平的逻辑信号。作为参考的阈值水平和表示差分电压的采样阀被做成等同地依赖于位于IC上的桥式元件。以这种方式，与位于IC外部的桥式电阻器相比，IC位于桥式电阻器中的任何变化都不会影响测量。

32. 发明授权

US4260960A Oscillator circuit 失效
标题翻译：振荡电路
公开(公告)号：US4260960A
公开(公告)日：1981-04-07
申请号：US38211
申请日：1979-05-11
申请人： Robert H. Isham , Cesare J. Petrizio
发明人： Robert H. Isham , Cesare J. Petrizio
IPC分类号： H03K3/352 , H03K3/35
CPC分类号： H03K3/352
摘要： Within an oscillator circuit of the type wherein positive or negative current is recurrently directed to the gate of a GTO device when the charge voltage levels across first and second capacitors respectively reach trigger levels, voltage sensing circuitry is incorporated to insure that the capacitors are charged during independent periods of time so that the duration of each portion in the frequency cycles is separately controllable.
摘要翻译：在这种类型的振荡器电路中，当跨过第一和第二电容器的充电电压电平分别达到触发电平时，正或负电流被反复地指向GTO装置的栅极，电压感测电路被并入，以确保电容器在独立的时间段，使得频率周期中的每个部分的持续时间是可以单独控制的。

33. 发明授权

US08188721B2 Active pulse positioning modulator 有权
标题翻译：有源脉冲定位调制器
公开(公告)号：US08188721B2
公开(公告)日：2012-05-29
申请号：US12492397
申请日：2009-06-26
申请人： Robert H. Isham , Weihong Qiu
发明人： Robert H. Isham , Weihong Qiu
IPC分类号： G05F1/40
CPC分类号： H03K7/08 , H02M3/156 , H02M3/1584 , H03K7/04
摘要： An adaptive pulse positioning modulator including a sense circuit which provides a compensation signal indicative of output voltage error, a filter circuit having an input receiving the compensation signal and an output providing an adjust signal, a leading ramp circuit which provides a repetitive first leading edge ramp signal having a slope which is adjusted by the adjust signal, a comparator circuit which provides a first start trigger signal when the first leading edge ramp signal reaches the compensation signal and a first end trigger signal when a first trailing edge ramp signal reaches the compensation signal, a trailing ramp circuit which initiates ramping of the first trailing edge ramp signal when the first start trigger signal is provided, and a pulse control logic which asserts pulses on a PWM signal based on the trigger signals.
摘要翻译：一种自适应脉冲定位调制器，包括提供表示输出电压误差的补偿信号的检测电路，具有接收补偿信号的输入端和提供调整信号的输出端的滤波器电路，提供重复的第一前沿斜坡信号具有通过调节信号调整的斜率;比较电路，当第一前沿斜坡信号达到补偿信号时提供第一起始触发信号，当第一后沿斜坡信号达到补偿信号时提供第一起始触发信号，当提供第一启动触发信号时启动第一后沿斜坡信号的斜坡的拖尾斜坡电路，以及基于触发信号在PWM信号上断言脉冲的脉冲控制逻辑。

34. 发明授权

US08018367B2 N-bit ADC reader 有权
标题翻译： N位ADC读卡器
公开(公告)号：US08018367B2
公开(公告)日：2011-09-13
申请号：US12631998
申请日：2009-12-07
申请人： Chun Cheung , Weihong Qiu , Robert H. Isham , Mir Mahin
发明人： Chun Cheung , Weihong Qiu , Robert H. Isham , Mir Mahin
IPC分类号： H03M1/12
CPC分类号： H03M1/20 , G01R27/14
摘要： An integrated circuit has a single input pin for determining a value associated with a resistor divider. First circuitry determines a resistor ratio of the resistor divider through the single input pin. A first register stores a first group of bits representing the resistor ratio. The first group of bits represents the least significant bits of the value. Second circuitry determines an equivalent resistance of the resistor divider through the single input pin. A second register stores a second group of bits representing the equivalent resistance.
摘要翻译：集成电路具有用于确定与电阻分压器相关联的值的单个输入引脚。第一个电路通过单个输入引脚确定电阻分压器的电阻比。第一寄存器存储表示电阻器比率的第一组位。第一组位表示该值的最低有效位。第二个电路通过单个输入引脚确定电阻分压器的等效电阻。第二寄存器存储表示等效电阻的第二组位。

35. 发明申请

US20110169472A1 DC-DC CONVERTERS HAVING IMPROVED CURRENT SENSING AND RELATED METHODS 有权
标题翻译：具有改进的电流感测的DC-DC转换器及相关方法
公开(公告)号：US20110169472A1
公开(公告)日：2011-07-14
申请号：US13053552
申请日：2011-03-22
申请人： Robert H. Isham
发明人： Robert H. Isham
IPC分类号： G05F1/10
CPC分类号： H02H7/1227 , G01R1/203 , G01R19/0092 , H02M3/1588 , H02M2001/0009 , Y02B70/1466
摘要： A DC-DC converter includes a chip including an error amplifier and a pulse width modulator (PWM) having an input connected to an output of the error amplifier, and an inductor driven by said PWM in series with an output node (VOUT) of the converter, wherein a load current flows through the inductor. VOUT is fed back through a network including a feedback resistor (RFB) to an inverting input of the error amplifier. A circuit for sensing the load current includes a first operational amplifier, a sense resistor on the chip having resistance RSENSE coupled to an inverting input of the first amplifier; wherein a sense current related to the load current flows through the sense resistor, a dependent current source provides an output current to supply the sense current. A reference resistor is disposed on the chip having a resistance RREFERENCE which is a fixed multiple of RSENSE. A set resistor is provided having a resistance RSET. Tracking circuitry sets a voltage across the reference resistor to be equal to a voltage across the set resistor. A function block is coupled to receive a current through the set resistor and a current through the reference resistor to find their ratio. A current multiplier is provided, wherein an output of the function block is coupled to the current multiplier. The current multiplier provides a measurement current which is proportional to the load current divided by RSET.
摘要翻译： DC-DC转换器包括具有误差放大器的芯片和具有连接到误差放大器的输出端的输入端的脉冲宽度调制器（PWM），以及由所述PWM驱动的电感器，其与所述PWM的输出节点（VOUT）串联转换器，其中负载电流流过电感器。 VOUT通过包括反馈电阻（RFB）的网络反馈到误差放大器的反相输入端。用于感测负载电流的电路包括第一运算放大器，芯片上的感测电阻器具有耦合到第一放大器的反相输入的电阻RSENSE; 其中与负载电流相关的感测电流流过检测电阻器，依赖电流源提供输出电流以提供感测电流。参考电阻器设置在芯片上，其具有作为RSENSE的固定倍数的电阻RREFERENCE。提供具有电阻RSET的设定电阻器。跟踪电路将参考电阻两端的电压设置为等于设定电阻两端的电压。功能块被耦合以接收通过设置电阻器的电流和通过参考电阻器的电流以找到它们的比率。提供电流倍增器，其中功能块的输出耦合到当前乘法器。电流乘法器提供与负载电流成比例的测量电流，除以RSET。

36. 发明授权

US07932704B1 System and method of providing control pulses to control operation of a converter with high frequency repetitive load transients 有权
标题翻译：提供控制脉冲以控制具有高频重复负载瞬变的转换器的操作的系统和方法
公开(公告)号：US07932704B1
公开(公告)日：2011-04-26
申请号：US12359569
申请日：2009-01-26
申请人： Robert H. Isham , Weihong Qiu
发明人： Robert H. Isham , Weihong Qiu
IPC分类号： G05F1/10 , G05F1/40
CPC分类号： H02M3/1584 , H02M2001/0025
摘要： A modulator for providing control pulses on a pulse control signal for controlling operation of a DC-DC converter is disclosed which includes a comparator, pulse control logic, a memory circuit and a switch circuit. The comparator compares a timing waveform with a compensation signal and provides a comparison signal with preliminary pulses. The pulse logic circuit receives the comparison signal and provides normal pulses on a normal pulse signal. The pulse logic circuit selects only those preliminary pulses which are provided during a permissible time window of each period of the periodic timing waveform. The memory circuit provides a pulse indication whenever a normal pulse does not occur on the pulse signal during any switching period. The switch circuit selects between the normal pulse signal and the comparison signal based on the pulse indication for providing the control pulses.
摘要翻译：公开了一种用于在控制DC-DC转换器的操作的脉冲控制信号上提供控制脉冲的调制器，其包括比较器，脉冲控制逻辑，存储器电路和开关电路。比较器将定时波形与补偿信号进行比较，并将比较信号与初步脉冲进行比较。脉冲逻辑电路接收比较信号并在正常脉冲信号上提供正常脉冲。脉冲逻辑电路仅选择在周期性定时波形的每个周期的允许时间窗口期间提供的那些初步脉冲。每当在任何切换周期期间脉冲信号上不发生正常脉冲时，存储电路提供脉冲指示。开关电路基于用于提供控制脉冲的脉冲指示，在正常脉冲信号和比较信号之间进行选择。

37. 发明授权

US07868600B2 Adaptive PWM pulse positioning for fast transient response 有权
标题翻译：自适应PWM脉冲定位，用于快速瞬态响应
公开(公告)号：US07868600B2
公开(公告)日：2011-01-11
申请号：US12273441
申请日：2008-11-18
申请人： Weihong Qiu , Robert H. Isham , Zhixiang Liang , Thomas Szepesi
发明人： Weihong Qiu , Robert H. Isham , Zhixiang Liang , Thomas Szepesi
IPC分类号： G05F1/56
CPC分类号： H02M3/33507 , H02M3/156
摘要： An adaptive pulse positioning system for a voltage converter including an adjustable ramp generator, a pulse generator circuit, and a sense and adjust circuit. The adjustable ramp generator has an adjust input and provides a periodic ramp voltage having an adjustable magnitude based on an adjust signal provided to the adjust input. The pulse generator circuit receives the ramp voltage and generates a pulse signal with control pulses for controlling the output voltage of the voltage controller based on the ramp voltage. The sense and adjust circuit senses an output load transient and provides the adjust signal to the adjust input of the ramp generator to adaptively shift the pulse signal in time in response to the output load transient without adding pulses to the pulse signal.
摘要翻译：一种用于电压转换器的自适应脉冲定位系统，包括可调斜率发生器，脉冲发生器电路以及感测和调节电路。可调斜坡发生器具有调节输入，并且基于提供给调节输入的调整信号提供具有可调幅度的周期性斜坡电压。脉冲发生器电路接收斜坡电压，并产生具有控制脉冲的脉冲信号，用于根据斜坡电压控制电压控制器的输出电压。感测和调节电路检测输出负载瞬变，并将调整信号提供给斜坡发生器的调整输入端，以响应于输出负载瞬变自适应地移动脉冲信号，而不向脉冲信号添加脉冲。

38. 发明授权

US07796365B2 Method of improved current sensing in DC-DC converters 有权
标题翻译：在DC-DC转换器中改进电流检测的方法
公开(公告)号：US07796365B2
公开(公告)日：2010-09-14
申请号：US12409239
申请日：2009-03-23
申请人： Robert H. Isham
发明人： Robert H. Isham
IPC分类号： H02H9/08
CPC分类号： H02H7/1227 , G01R1/203 , G01R19/0092 , H02M3/1588 , H02M2001/0009 , Y02B70/1466
摘要： A DC-DC converter includes a chip including an error amplifier and a pulse width modulator (PWM) having an input connected to an output of the error amplifier, and an inductor driven by said PWM in series with an output node (VOUT) of the converter, wherein a load current flows through the inductor. VOUT is fed back through a network including a feedback resistor (RFB) to an inverting input of the error amplifier. A circuit for sensing the load current includes a first operational amplifier, a sense resistor on the chip having resistance RSENSE coupled to an inverting input of the first amplifier; wherein a sense current related to the load current flows through the sense resistor, a dependent current source provides an output current to supply the sense current. A reference resistor is disposed on the chip having a resistance RREFERENCE which is a fixed multiple of RSENSE. A set resistor is provided having a resistance RSET. Tracking circuitry sets a voltage across the reference resistor to be equal to a voltage across the set resistor. A function block is coupled to receive a current through the set resistor and a current through the reference resistor to find their ratio. A current multiplier is provided, wherein an output of the function block is coupled to the current multiplier. The current multiplier provides a measurement current which is proportional to the load current divided by RSET.
摘要翻译： DC-DC转换器包括具有误差放大器的芯片和具有连接到误差放大器的输出端的输入端的脉冲宽度调制器（PWM），以及由所述PWM驱动的电感器，其与所述PWM的输出节点（VOUT）串联转换器，其中负载电流流过电感器。 VOUT通过包括反馈电阻（RFB）的网络反馈到误差放大器的反相输入端。用于感测负载电流的电路包括第一运算放大器，芯片上的感测电阻器具有耦合到第一放大器的反相输入的电阻RSENSE; 其中与负载电流相关的感测电流流过检测电阻器，依赖电流源提供输出电流以提供感测电流。参考电阻器设置在芯片上，其具有作为RSENSE的固定倍数的电阻RREFERENCE。提供具有电阻RSET的设定电阻器。跟踪电路将参考电阻两端的电压设置为等于设定电阻两端的电压。功能块被耦合以接收通过设置电阻器的电流和通过参考电阻器的电流以找到它们的比率。提供电流倍增器，其中功能块的输出耦合到当前乘法器。电流乘法器提供与负载电流成比例的测量电流，除以RSET。

39. 发明授权

US07535211B2 Voltage regulator having current canceling compensation 有权
标题翻译：具有电流消除补偿的电压调节器
公开(公告)号：US07535211B2
公开(公告)日：2009-05-19
申请号：US11528251
申请日：2006-09-27
申请人： Robert H. Isham
发明人： Robert H. Isham
IPC分类号： G05F1/40
CPC分类号： H02M3/156 , H02M2001/0022
摘要： A voltage regulator which includes a network for improved compensation for reference voltage changes includes an IC including an error amplifier and a pulse width modulator (PWM), wherein an input of the PWM is coupled to an output of the error amplifier. A low pass filter comprising an inductor is in series with a grounded capacitor coupled to an output of the PWM, wherein an output of the regulator (Vout) is at a node between the inductor and the capacitor. A first feedback network is disposed between Vout and an inverting input of the error amplifier and a second feedback network is disposed between an output of the error amplifier and the inverting input of the error amplifier. A current cancellation network is coupled to the inverting input of the error amplifier. The current cancellation network injects a canceling current into the inverting input that is substantially equal in magnitude and opposite in polarity to current flowing through the second feedback network triggered by a change in reference voltage when applied to the error amplifier.
摘要翻译：包括用于改善对参考电压变化的补偿的网络的电压调节器包括包括误差放大器和脉宽调制器（PWM）的IC，其中PWM的输入耦合到误差放大器的输出。包括电感器的低通滤波器与耦合到PWM的输出的接地电容器串联，其中调节器（Vout）的输出位于电感器和电容器之间的节点处。第一反馈网络设置在Vout和误差放大器的反相输入端之间，第二反馈网络设置在误差放大器的输出端和误差放大器的反相输入端之间。电流消除网络耦合到误差放大器的反相输入端。当施加到误差放大器时，当前取消网络向反相输入端注入大致相等的量值，并且极性与流过第二反馈网络的电流相反，该电流由参考电压的变化触发。

40. 发明申请

US20090072807A1 ADAPTIVE PWM PULSE POSITIONING FOR FAST TRANSIENT RESPONSE 有权
标题翻译：自适应PWM脉冲定位快速瞬态响应
公开(公告)号：US20090072807A1
公开(公告)日：2009-03-19
申请号：US12273441
申请日：2008-11-18
申请人： Weihong Qiu , Robert H. Isham , Zhixiang Liang , Thomas Szepesi
发明人： Weihong Qiu , Robert H. Isham , Zhixiang Liang , Thomas Szepesi
IPC分类号： G05F1/565
CPC分类号： H02M3/33507 , H02M3/156
摘要： An adaptive pulse positioning system for a voltage converter including an adjustable ramp generator, a pulse generator circuit, and a sense and adjust circuit. The adjustable ramp generator has an adjust input and provides a periodic ramp voltage having an adjustable magnitude based on an adjust signal provided to the adjust input. The pulse generator circuit receives the ramp voltage and generates a pulse signal with control pulses for controlling the output voltage of the voltage controller based on the ramp voltage. The sense and adjust circuit senses an output load transient and provides the adjust signal to the adjust input of the ramp generator to adaptively shift the pulse signal in time in response to the output load transient without adding pulses to the pulse signal.
摘要翻译：一种用于电压转换器的自适应脉冲定位系统，包括可调斜率发生器，脉冲发生器电路以及感测和调节电路。可调斜坡发生器具有调节输入，并且基于提供给调节输入的调整信号提供具有可调幅度的周期性斜坡电压。脉冲发生器电路接收斜坡电压，并产生具有控制脉冲的脉冲信号，用于根据斜坡电压控制电压控制器的输出电压。感测和调节电路检测输出负载瞬变，并将调整信号提供给斜坡发生器的调整输入端，以响应于输出负载瞬变自适应地移动脉冲信号，而不向脉冲信号添加脉冲。

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