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1. 发明授权

US06957910B1 Synchronized delta-VBE measurement system 有权
标题翻译：同步delta-VBE测量系统
公开(公告)号：US06957910B1
公开(公告)日：2005-10-25
申请号：US10835478
申请日：2004-04-28
申请人： Jun Wan , Peter R. Holloway , Gary E. Sheehan
发明人： Jun Wan , Peter R. Holloway , Gary E. Sheehan
IPC分类号： G01K7/01 , G01K7/16 , H01L35/00 , H03K17/06
CPC分类号： H03K17/063 , G01K7/01
摘要： A circuit in an integrated circuit for measuring temperature dependent voltages of a temperature sensing element includes a voltage generator circuit providing the temperature dependent voltages, a first sampling switch and a second sampling switch. The voltage generator circuit includes a temperature sensing element being excited by a first switched current and a second switched current. The first and second sampling switches sample a first voltage and a second voltage at the temperature sensing element while the temperature sensing element is being excited by the second current and the first current, respectively. Each of the first and second sampling switches includes a boosted switch circuit incorporating a pedestal voltage compensation circuit. The sampled first and second voltages are coupled to be stored on capacitors external to the integrated circuit. The difference between the first voltage and the second voltage is measured to determine the temperature of the integrated circuit.
摘要翻译：用于测量温度感测元件的温度相关电压的集成电路中的电路包括提供温度相关电压的电压发生器电路，第一采样开关和第二采样开关。电压发生器电路包括由第一开关电流和第二开关电流激励的温度感测元件。第一和第二采样开关分别在第二电流和第一电流激发温度感测元件时在温度感测元件处采样第一电压和第二电压。第一采样开关和第二采样开关中的每一个包括具有基座电压补偿电路的升压开关电路。采样的第一和第二电压被耦合以存储在集成电路外部的电容器上。测量第一电压和第二电压之间的差以确定集成电路的温度。

2. 发明授权

US06736540B1 Method for synchronized delta-VBE measurement for calculating die temperature 有权
标题翻译：用于计算模具温度的同步delta-VBE测量方法
公开(公告)号：US06736540B1
公开(公告)日：2004-05-18
申请号：US10375297
申请日：2003-02-26
申请人： Gary E. Sheehan , Jun Wan
发明人： Gary E. Sheehan , Jun Wan
IPC分类号： G01K701
CPC分类号： G01K7/01
摘要： A method for measuring a temperature of an integrated circuit is disclosed. The integrated circuit includes a temperature sensing element being excited by a first switched current and a second switched current. The method includes coupling a first capacitor to the temperature sensing element through a first switch and coupling a second capacitor to the temperature sensing element through a second switch. The first and second capacitors are external to the integrated circuit. The method further includes charging the first capacitor through the first switch to a first voltage when the temperature sensing element is being excited by the first switched current, charging the second capacitor through the second switch to a second voltage when the temperature sensing element is being excited by the second switched current, and measuring a difference between the first voltage and the second voltage to determine the temperature of the integrated circuit.
摘要翻译：公开了一种用于测量集成电路的温度的方法。集成电路包括由第一开关电流和第二开关电流激发的温度感测元件。该方法包括通过第一开关将第一电容器耦合到温度感测元件，并通过第二开关将第二电容器耦合到温度感测元件。第一和第二电容器在集成电路外部。该方法还包括当温度感测元件被第一开关电流激励时，将第一电容器通过第一开关充电到第一电压，当温度感测元件被激发时，通过第二开关将第二电容器充电到第二电压通过第二开关电流，并且测量第一电压和第二电压之间的差以确定集成电路的温度。

3. 发明授权

US07372392B1 Charge balancing method in a current input ADC 有权
标题翻译：电流输入ADC中的电荷平衡方法
公开(公告)号：US07372392B1
公开(公告)日：2008-05-13
申请号：US11679070
申请日：2007-02-26
申请人： Jun Wan , Peter R. Holloway
发明人： Jun Wan , Peter R. Holloway
IPC分类号： H03M1/12
CPC分类号： H03M1/0607 , H03F3/45179 , H03F3/45183 , H03F3/45475 , H03F3/45766 , H03F2200/264 , H03F2203/45136 , H03F2203/45212 , H03F2203/45342 , H03F2203/45352
摘要： A method for charge balancing in a current input ADC including maintaining a low capacitance value at the integrator output node where the capacitance value is independent of the integrator output voltage and operating conditions, generating a first voltage pedestal at a first active device switch at the end of the autozero phase having a first voltage polarity and a first magnitude, generating a second voltage pedestal at a second active device switch at the end of the integration phase having an opposite voltage polarity and the first magnitude, and summing the first voltage pedestal with the second voltage pedestal. The difference between the first voltage pedestal and the second voltage pedestal results in a net voltage error. The first and second voltage pedestals have the first magnitude under all operating conditions of the modulator and the two voltage pedestals cancel to yield a small net voltage error.
摘要翻译：一种用于电流输入ADC中的电荷平衡的方法，包括在积分器输出节点处维持低电容值，其中电容值与积分器输出电压和工作条件无关，在最终的第一有源器件开关处产生第一电压基座的自相位相具有第一电压极性和第一幅度，在具有相反电压极性和第一幅度的积分相位结束时在第二有源器件开关处产生第二电压基座，并且将第一电压基座与第二电压基座。第一电压基座和第二电压基座之间的差异导致净电压误差。第一和第二电压基座在调制器的所有工作条件下都具有第一幅度，并且两个电压基座取消以产生小的净电压误差。

4. 发明授权

US07119612B1 Dual-channel instrumentation amplifier 有权
标题翻译：双通道仪表放大器
公开(公告)号：US07119612B1
公开(公告)日：2006-10-10
申请号：US10954417
申请日：2004-09-29
申请人： Peter R. Holloway , Jun Wan
发明人： Peter R. Holloway , Jun Wan
IPC分类号： H03F1/02 , H03F3/45
CPC分类号： H03F1/02 , H03F3/45179 , H03F3/45188 , H03F3/45475 , H03F3/68 , H03F2200/261 , H03F2200/78 , H03F2203/45318 , H03F2203/45521
摘要： A dual-channel instrumentation amplifier includes two channels of PMOS transistor differential pairs which are configured in a Y-connection and cross-coupled to two diode-connected NMOS transistors. Each input channel has a non-linear voltage-current characteristic. But when the differential currents cancel at the NMOS transistor diodes, both input channels have the same differential input voltage, regardless of any non-linearity. As thus configured, a high accuracy instrumentation amplifier which operates in current mode is realized with excellent DC matching and high common mode rejection ratio. In one embodiment, the dual-channel instrumentation amplifier is used as input stage for the linear comparator to enable the linear comparator to operate at a high rate of speed with excellent channel matching.
摘要翻译：双通道仪表放大器包括两个PMOS晶体管差分对通道，它们被配置为Y形连接并交叉耦合到两个二极管连接的NMOS晶体管。每个输入通道具有非线性电压 - 电流特性。但是当NMOS晶体管二极管上的差分电流消失时，两个输入通道都具有相同的差分输入电压，无论任何非线性。如此配置，通过优异的直流匹配和高共模抑制比实现了以电流模式工作的高精度仪表放大器。在一个实施例中，双通道仪表放大器用作线性比较器的输入级，使得线性比较器能够以高速率运行，具有出色的通道匹配。

5. 发明授权

US07015744B1 Self-regulating low current watchdog current source 有权
标题翻译：自调节低电流看门狗电流源
公开(公告)号：US07015744B1
公开(公告)日：2006-03-21
申请号：US10860473
申请日：2004-06-02
申请人： Peter R. Holloway , Jun Wan
发明人： Peter R. Holloway , Jun Wan
IPC分类号： G05F1/10
CPC分类号： G05F3/262 , H03K17/223
摘要： A self-regulating current source is formed by a PMOS current mirror and an interconnected pair of NMOS transistors. The NMOS transistors are sized differently and forced to operate at similar currents. The difference of the Vgs voltages of the NMOS transistors is impressed across the resistor to develop a stable output current. In particular, the current source starts reliably at low supply voltages and operates to reliably generate a stable low output current at a well-controlled operating point. The self-regulating current source can be used effectively as the watchdog current source of a power-on reset circuit to ensure reliable and robust operation even at low Vdd voltage values.
摘要翻译：自调节电流源由PMOS电流镜和互连的一对NMOS晶体管形成。 NMOS晶体管的尺寸不同，并被迫在类似的电流下工作。 NMOS晶体管的Vgs电压差在电阻器上施加，以产生稳定的输出电流。特别地，电流源在低电源电压下可靠地启动，并且操作以在良好控制的工作点可靠地产生稳定的低输出电流。自调节电流源可以有效地用作上电复位电路的看门狗电流源，以确保即使在低Vdd电压值下也能稳定运行。

6. 发明授权

US06869216B1 Digitizing temperature measurement system 有权
标题翻译：数字化温度测量系统
公开(公告)号：US06869216B1
公开(公告)日：2005-03-22
申请号：US10402658
申请日：2003-03-27
申请人： Peter R. Holloway , Eric D. Blom , Jun Wan , Stuart H. Urie
发明人： Peter R. Holloway , Eric D. Blom , Jun Wan , Stuart H. Urie
IPC分类号： G01K1/02 , G01K7/01 , H03M3/02 , H03M3/00
CPC分类号： H03M3/324 , G01K1/028 , G01K7/01 , H03M3/43 , H03M3/456
摘要： A digitizing temperature measurement system for providing a digital temperature measurement includes an excitation source for providing switched excitation currents to two or three temperature sensing elements and an ADC circuit including a charge-balancing modulator and a digital post processing circuit. The system utilizes synchronous AC excitation of the temperature sensing elements and an AC coupled analog-to-digital converter input. The temperature measurement system also implements correlated double sampling for noise cancellation to provide low noise and highly accurate analog-to-digital conversions. The modulator receives a charge domain reference signal generated by a reference charge packet generator incorporating a charge based bandgap subsystem. Therefore, the temperature measurement system can be operated at very low supply voltages, such as 1.0 Vdc. A low noise and highly accurate temperature measurement system is thus realized where temperature measurements of very high resolutions (up to 16 bit) can be attained.
摘要翻译：用于提供数字温度测量的数字化温度测量系统包括用于向两个或三个温度感测元件提供开关激励电流的激励源和包括电荷平衡调制器和数字后处理电路的ADC电路。该系统利用温度感测元件的同步AC励磁和AC耦合模数转换器输入。温度测量系统还实现了噪声消除的相关双采样，以提供低噪声和高精度的模数转换。调制器接收由包含基于电荷的带隙子系统的参考电荷包发生器产生的电荷域参考信号。因此，温度测量系统可以在非常低的电源电压下工作，例如1.0 Vdc。因此，实现了可以获得非常高分辨率（高达16位）的温度测量的低噪声和高精度的温度测量系统。

7. 发明授权

US06750796B1 Low noise correlated double sampling modulation system 有权
标题翻译：低噪声相关双采样调制系统
公开(公告)号：US06750796B1
公开(公告)日：2004-06-15
申请号：US10401835
申请日：2003-03-27
申请人： Peter R. Holloway , Eric D. Blom , Jun Wan
发明人： Peter R. Holloway , Eric D. Blom , Jun Wan
IPC分类号： H03M300
CPC分类号： H03M3/494 , H03M3/342 , H03M3/39 , H03M3/43 , H03M3/456
摘要： A charge balancing modulation system for digitizing the output of a variable impedance sensor utilizes synchronous excitation of the input sensor and AC coupling of the analog input signal. The modulation system also implements correlated double sampling to provide low noise and highly accurate analog-to-digital conversions. In one embodiment, the modulation system includes an excitation source for providing a switched current to the input sensor and generating an input voltage step in response, and an integrator including an input capacitor, an amplifier and an accumulation capacitor. The input capacitor AC couples the analog input signal to the integrator. The integrator is controlled by switches operating in complementary state for enabling correlated double sampling operation or enabling data dependent charge accumulation operation. The modulation system generates an output data stream exhibiting a ones density proportional to the magnitude of the average input voltage step.
摘要翻译：用于数字化可变阻抗传感器的输出的电荷平衡调制系统利用输入传感器的同步激励和模拟输入信号的AC耦合。调制系统还实现相关的双采样，以提供低噪声和高精度的模数转换。在一个实施例中，调制系统包括用于向输入传感器提供开关电流并产生响应的输入电压阶跃的激励源，以及包括输入电容器，放大器和积累电容器的积分器。输入电容器AC将模拟输入信号耦合到积分器。积分器由在互补状态下工作的开关控制，以实现相关双采样操作或启用数据相关电荷积累操作。调制系统产生表现出与平均输入电压阶跃幅度成比例的一个密度的输出数据流。

8. 发明授权

US07385426B1 Low current offset integrator with signal independent low input capacitance buffer circuit 有权
标题翻译：低电流补偿积分器，具有信号独立的低输入电容缓冲电路
公开(公告)号：US07385426B1
公开(公告)日：2008-06-10
申请号：US11679053
申请日：2007-02-26
申请人： Jun Wan , Peter R. Holloway
发明人： Jun Wan , Peter R. Holloway
IPC分类号： H03K19/094 , H03H11/26
CPC分类号： H03F3/70 , H03F3/45179 , H03F3/45475 , H03F3/45766 , H03F2200/264 , H03F2203/45038 , H03F2203/45166 , H03F2203/45212 , H03F2203/45354
摘要： A buffer circuit (318) including a first half circuit and a second half circuit. Each half circuit includes a first MOS transistor (M4, M9) as the input device and a source follower, a second MOS transistor (M23, M22) as a transconductance amplifier device, and a third MOS transistor (M5, M8) as a folded cascode device. The first half circuit receives a buffer input voltage as the input voltage and the second half circuit receives a reference voltage as the input voltage. The first and second half circuits providing a pair of differential output signals indicative of the buffer input voltage. The buffer circuit has a very low input capacitance where the input capacitance does not vary with the buffer input voltage and other operating conditions, such as fabrication process, temperature and power supply voltage variations.
摘要翻译：一种包括第一半电路和第二半电路的缓冲电路（318）。每个半电路包括作为输入装置的第一MOS晶体管（M 4，M 9）和源极跟随器，作为跨导放大器装置的第二MOS晶体管（M23，M22）和第三MOS晶体管（M5， M 8）作为折叠共源共栅器件。前半部电路接收缓冲器输入电压作为输入电压，第二半电路接收参考电压作为输入电压。第一和第二半电路提供指示缓冲器输入电压的一对差分输出信号。缓冲电路具有非常低的输入电容，其中输入电容不随缓冲器输入电压和其他工作条件（例如制造工艺，温度和电源电压变化）而变化。

9. 发明授权

US06962436B1 Digitizing temperature measurement system and method of operation 有权
标题翻译：数字化温度测量系统及操作方法
公开(公告)号：US06962436B1
公开(公告)日：2005-11-08
申请号：US11083861
申请日：2005-03-17
申请人： Peter R. Holloway , Eric D. Blom , Jun Wan , Stuart H. Urie
发明人： Peter R. Holloway , Eric D. Blom , Jun Wan , Stuart H. Urie
IPC分类号： G01K1/02 , G01K7/01 , H03M3/02 , H03M3/00
CPC分类号： H03M3/324 , G01K1/028 , G01K7/01 , H03M3/43 , H03M3/456
摘要： A digitizing temperature measurement system for providing a digital temperature measurement includes an excitation source for providing switched excitation currents to two or three temperature sensing elements and an ADC circuit including a charge-balancing modulator and a digital post processing circuit. The system utilizes synchronous AC excitation of the temperature sensing elements and an AC coupled analog-to-digital converter input. The temperature measurement system also implements correlated double sampling for noise cancellation to provide low noise and highly accurate analog-to-digital conversions. The modulator receives a charge domain reference signal generated by a reference charge packet generator incorporating a charge based bandgap subsystem. Therefore, the temperature measurement system can be operated at very low supply voltages, such as 1.0 Vdc. A low noise and highly accurate temperature measurement system is thus realized where temperature measurements of very high resolutions (up to 16 bit) can be attained.
摘要翻译：用于提供数字温度测量的数字化温度测量系统包括用于向两个或三个温度感测元件提供开关激励电流的激励源和包括电荷平衡调制器和数字后处理电路的ADC电路。该系统利用温度感测元件的同步AC励磁和AC耦合模数转换器输入。温度测量系统还实现了噪声消除的相关双采样，以提供低噪声和高精度的模数转换。调制器接收由包含基于电荷的带隙子系统的参考电荷包发生器产生的电荷域参考信号。因此，温度测量系统可以在非常低的电源电压下工作，例如1.0 Vdc。因此，实现了可以获得非常高分辨率（高达16位）的温度测量的低噪声和高精度的温度测量系统。

10. 发明授权

US06903558B1 Digitizing ohmmeter system 有权
公开(公告)号：US06903558B1
公开(公告)日：2005-06-07
申请号：US10423355
申请日：2003-04-25
申请人： Eric D. Blom , Peter R. Holloway , Jun Wan , Stuart H. Urie
发明人： Eric D. Blom , Peter R. Holloway , Jun Wan , Stuart H. Urie
IPC分类号： G01R27/02 , G01R1/38
CPC分类号： G01R27/02
摘要： A digitizing ohmmeter system for providing a digital resistance measurement includes a current source for providing an excitation current to an impedance-varying input sensor and an ADC circuit including a charge-balancing modulator and a digital post processing circuit. The system utilizes synchronous AC excitation of the input sensor and an AC coupled analog-to-digital converter input. The digitizing ohmmeter system also implements correlated double sampling for noise cancellation to provide low noise and highly accurate analog-to-digital conversions. The ADC circuit includes a reference signal generator generating a resistance reference signal by time-sharing the excitation current with the input sensor. The digitizing ohmmeter system thereby realizes fully ratiometric operation such that neither a precise current source nor a precise voltage source is required for accurate resistance measurements.

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