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公开(公告)号：US20210263080A1
公开(公告)日：2021-08-26
申请号：US16796405
申请日：2020-02-20
申请人： Apple Inc.
发明人： Ramy A. Ahmed , Bruno W. Garlepp , Jafar Savoj
IPC分类号： G01R19/255 , H03K19/0175 , H03K21/08 , H03K3/03 , G01K7/00
摘要： A circuit for sensing local operating properties of an integrated circuit is disclosed. The circuit may include one or more sensor circuits configured to sense the local operating properties of the integrated circuit. The sensor circuits may receive a supply voltage with a magnitude in a limited range from a digital power supply that is different from the digital power supply that provides power to functional circuits in the integrated circuit. Level shifters may be coupled to the sensor circuits to shift output signals from the sensor circuits to levels that correspond to the digital power supply that provides power to functional circuits in the integrated circuit. Counters and a shift register may be coupled to the level shifters to receive the shifted output signals, the values of which may be used to determine the local operating properties of the integrated circuit as sensed by the sensor circuits.
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公开(公告)号：US09829948B2
公开(公告)日：2017-11-28
申请号：US14858035
申请日：2015-09-18
申请人： Apple Inc.
发明人： Joseph T. DiBene, II , Jafar Savoj , Inder M. Sodhi , Cyril de la Cropte de Chanterac , Sotirios Zogopoulos
CPC分类号： G06F1/28 , G01R19/2506 , G01R19/255 , G06F1/26 , G06F1/263
摘要： An apparatus for determining an average current through an inductor of a regulator circuit is disclosed. A counter unit may be configured to receive a control signal, which includes a plurality of pulses, from a Power Management Unit (PMU), and determine a number of pulses received during a predetermined period of time. A pulse sampler unit may determine a duration of a given pulse of the plurality of pulses. Circuitry may be configured to determine the average current through the inductor during the predetermined period of time dependent upon the number of pulses received during the predetermined period of time and the duration of the given pulse.
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公开(公告)号：US06963194B2
公开(公告)日：2005-11-08
申请号：US10733077
申请日：2003-12-11
申请人： Hsin-An Wu
发明人： Hsin-An Wu
IPC分类号： G01R19/255 , G01R19/00
CPC分类号： G01R19/255
摘要： An analog signal measuring device for measuring an analog signal includes a digital controller, a waveform converter and a comparator. The digital controller includes a PWM controller for outputting a pulse signal having an adjustable pulse width to the waveform converter, which converts the pulse signal into a sawtooth wave or a triangle wave for output as a carrier signal. Next, the comparator feeds a comparison pulse signal, which is obtained by comparing the carrier signal to the analog signal, to the digital controller, which enables or disables the counter to generate a count value corresponding to the comparison pulse signal. Since the count value depends on the comparison pulse signal and the type of the comparison pulse signal is directly related to the analog signal, the digital controller may get the analog signal according to the count value.
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公开(公告)号：US20050012511A1
公开(公告)日：2005-01-20
申请号：US10733077
申请日：2003-12-11
申请人： Hsin-An Wu
发明人： Hsin-An Wu
IPC分类号： G01R19/255 , G01R27/08
CPC分类号： G01R19/255
摘要： An analog signal measuring device for measuring an analog signal includes a digital controller, a waveform converter and a comparator. The digital controller includes a PWM controller for outputting a pulse signal having an adjustable pulse width to the waveform converter, which converts the pulse signal into a sawtooth wave or a triangle wave for output as a carrier signal. Next, the comparator feeds a comparison pulse signal, which is obtained by comparing the carrier signal to the analog signal, to the digital controller, which enables or disables the counter to generate a count value corresponding to the comparison pulse signal. Since the count value depends on the comparison pulse signal and the type of the comparison pulse signal is directly related to the analog signal, the digital controller may get the analog signal according to the count value.
摘要翻译： 用于测量模拟信号的模拟信号测量装置包括数字控制器，波形转换器和比较器。 数字控制器包括一个PWM控制器，用于向波形转换器输出具有可调脉冲宽度的脉冲信号，该脉冲信号将脉冲信号转换为锯齿波或三角波作为载波信号输出。 接下来，比较器将通过将载波信号与模拟信号进行比较而获得的比较脉冲信号馈送到数字控制器，该数字控制器使能或禁止计数器产生对应于比较脉冲信号的计数值。 由于计数值取决于比较脉冲信号，比较脉冲信号的类型与模拟信号直接相关，因此数字控制器可以根据计数值得到模拟信号。
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公开(公告)号：US4678345A
公开(公告)日：1987-07-07
申请号：US858424
申请日：1986-05-01
申请人： Agoston Agoston
发明人： Agoston Agoston
IPC分类号： G01R13/32 , G01R13/34 , G01R19/255 , G04F5/00 , G04F8/00
CPC分类号： G01R19/255 , G01R13/32 , G01R13/34 , G04F5/00
摘要： An equivalent time pseudorandom sampling system samples a repetitive waveform within each of several narrow acquisition windows bounding repetitive sections of the waveform in order to obtain equivalent time sample data characterizing the shape of the waveform included within the acquisition windows. The period between successive triggering events is measured and sampling is delayed following an initiating triggering event by delay time adjusted according to the measured period so as to maximize the probability that sampling will occur within an acquisition window. The time difference between samples and subsequent triggering event is measured with high accuracy and resolution utilizing a time interval measurement system based on a dual vernier interpolation.
摘要翻译： 等效时间伪随机采样系统在围绕波形的重复部分的几个窄采集窗口的每一个采样重复波形，以获得表征包含在采集窗口内的波形的形状的等效时间采样数据。 测量连续触发事件之间的周期，并且根据测量周期调整延迟时间后的起始触发事件之后采样被延迟，以便最大化在采集窗口内进行采样的概率。 使用基于双游标内插的时间间隔测量系统，以高精度和分辨率测量采样和后续触发事件之间的时间差。
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公开(公告)号：US4620148A
公开(公告)日：1986-10-28
申请号：US644242
申请日：1984-08-27
CPC分类号： G01R19/0092 , G01J3/36 , G01R19/0023 , G01R19/255 , G01J2003/2836
摘要： A precision current meter of wide dynamic range and sensitivity to low currents is disclosed. The precision current meter is particularly useful as a component for spectrochemical computations in spectrometers for the simultaneous multielement analysis of unknown samples in solution. The precision current meter comprises a source of input current, preferably a photomultiplier tube, an integrator having an integrating capacity for detecting the input current from the source, a source of reference currents including an offset current, a switch with a drain current coupled to the integrator. A clock is provided for generating clock signals for the current meter, including a series of pulses to actuate the switch and thereby to admit drain current segments to the integrator. A first counter is coupled to the output of the integrator to count the number of the series of actuating pulses during a predetermined time interval, and a second counter coupled to both the integrator output and the clock fixes the predetermined time interval. Preferably, both the integrator output and the switch are coupled via optical couplers to the counters.
摘要翻译： 公开了一种具有宽动态范围和对低电流灵敏度的精密电流表。 精密电流表特别适用于光谱仪中用于分析溶液中未知样品的同时多元素分析的光谱化学计算的组件。 精密电流表包括输入电流源，优选光电倍增管，具有用于检测来自源极的输入电流的积分能力的积分器，包括偏移电流的参考电流源，与漏极电流耦合的开关 集成商 提供用于产生电流表的时钟信号的时钟，包括用于致动开关的一系列脉冲，从而允许漏极电流段接收到积分器。 第一计数器耦合到积分器的输出以在预定时间间隔内对一系列致动脉冲的数量进行计数，并且耦合到积分器输出和时钟两者的第二计数器固定预定时间间隔。 优选地，积分器输出和开关都经由光耦合器耦合到计数器。
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公开(公告)号：US4595906A
公开(公告)日：1986-06-17
申请号：US407332
申请日：1982-08-12
申请人： David Bingham
发明人： David Bingham
IPC分类号： H03M1/52 , G01R19/255 , H03M1/00 , H03M1/10 , H03K13/20
CPC分类号： G01R19/255 , H03M1/52
摘要： An analog to digital converter is provided in which the converter output is scaled in accordance with the ratio of the clocking frequencies.
摘要翻译： 提供了一种模数转换器，其中转换器输出根据时钟频率的比例被缩放。
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公开(公告)号：US4339958A
公开(公告)日：1982-07-20
申请号：US123431
申请日：1980-02-21
申请人： Herbert A. Shauger
发明人： Herbert A. Shauger
IPC分类号： H03M1/52 , G01R19/255 , H03M1/00 , G01F1/00 , H03K13/02
摘要： An analog-to-digital converter for an electromagnetic flowmeter in which the fluid being metered passes through a flow tube to intersect a magnetic field, the voltage induced in the fluid being transferred to a pair of electrodes. The magnetic field is established by an electromagnet supplied with excitation current that is alternately turned "on" and "off" at a low frequency rate. The resultant flow-induced electrode signal is sampled for a predetermined interval in each "on" and "off" field state, successive differences therebetween serving to develop an analog signal representing the flow rate. Conversion is effected by integrating each sample to produce a sloped voltage whose polarity corresponds to that of the sample and whose peak level relative to a base level is determined by the amplitude of the sample, the sloped voltage being then de-integrated back to base level in a time slot whose duration is directly proportional to the average level of the sample. A burst of pulses is extracted from a stable high-frequency oscillator during this time slot, the pulse count of the burst being determined by the duration of the slot, thereby converting each sample to a digital value.
摘要翻译： 一种用于电磁流量计的模拟 - 数字转换器，其中待计量的流体通过流管以与磁场相交，在流体中感应的电压被传送到一对电极。 磁场由提供有以低频率交替地“开”和“关”的激励电流的电磁体建立。 所得到的流动感应电极信号在每个“接通”和“关闭”场状态中被采样预定间隔，其间的连续差异用于产生表示流量的模拟信号。 通过对每个样品进行积分以产生其极性对应于样品的倾斜电压并且其相对于基极电平的峰值水平由样品的振幅确定的倾斜电压来实现转换，然后将斜率电压反向集成回到基准电平 在其时间段的持续时间与样本的平均水平成正比。 在该时隙期间从稳定的高频振荡器提取脉冲串，脉冲串的脉冲计数由时隙的持续时间确定，从而将每个采样值转换为数字值。
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公开(公告)号：US4158809A
公开(公告)日：1979-06-19
申请号：US772628
申请日：1977-02-28
申请人： Harry A. Dellamano
发明人： Harry A. Dellamano
CPC分类号： G01R19/255 , G01R19/10
摘要： Method and apparatus for measuring the magnitude of a varying analog signal and for displaying a close approximation of a final stabilized value before the signal reaches stabilization. An analog-to-digital converter converts the analog signal to corresponding digital pulse signals and the digital pulse signals are displayed to an operator. Automatic display-hold circuitry determines the pulse count difference between successive pulse count signals separated by a predetermined time interval, compares the difference to predetermined value, and, when the predetermined value is reached, generates a control signal which locks the displayed value and prevents the display from updating as the analog signal continues to vary. The difference between pulse signals is taken by storing the first signal in an up/down counter and decrementing the counter in response to the second signal. The circuitry determines the pulse count difference and the sign of the difference between the two signals by counting either (1) the number of remaining pulses in the second signal after the counter decrements to zero or (2) the number of additional pulses required to decrement the counter to zero after termination of the second signal.
摘要翻译： 用于测量变化模拟信号的大小并用于在信号达到稳定之前显示最终稳定值的近似值的方法和装置。 模拟 - 数字转换器将模拟信号转换为相应的数字脉冲信号，数字脉冲信号显示给操作员。 自动显示保持电路确定以预定时间间隔分开的连续脉冲计数信号之间的脉冲计数差，将该差与预定值进行比较，并且当达到预定值时，产生锁定显示值的控制信号， 当模拟信号继续变化时，从更新显示。 通过将第一信号存储在上/下计数器中并且响应于第二信号递减计数器来获取脉冲信号之间的差异。 电路通过计数（1）计数器递减到零之后的第二信号中的剩余脉冲数，或（2）递减所需的附加脉冲数来确定脉冲计数差和两个信号之间的差的符号 在第二个信号终止后计数器为零。
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公开(公告)号：US3909729A
公开(公告)日：1975-09-30
申请号：US49844574
申请日：1974-08-19
发明人： FRY PETER WILLIAM
CPC分类号： G01R19/255 , G01R13/02 , H03K21/08 , H03M1/50
摘要： Output circuitry for a digital instrument includes a counter providing a binary coded digital number which represents a measured value of an electrical parameter and which is periodically updated. The binary coded number in the counter is transferred to an output store in response to periodic transfer pulses. Control means are provided to reduce flicker in a digital display driven from the store by preventing the transfer of the least significant digit of the digital number from the counter to the store in response to a transfer pulse if such digit represents a transition between oddness and evenness when compared with the corresponding digit of the number at the time of the immediately preceding transfer pulse. In a preferred embodiment, the control means is also operative to prevent the transfer of the entire digital number to the store in response to a transfer pulse if the least significant digit is ''''ZERO'''' or ''''NINE'''' and the transfer of the least significant digit is prevented.
摘要翻译： 用于数字仪器的输出电路包括提供二进制编码数字数字的计数器，其表示电参数的测量值并且周期性地更新。 响应于周期性传输脉冲，计数器中的二进制编码数字被传送到输出存储器。 提供控制装置以通过防止如果这样的数字表示奇数和均匀度之间的转换，则通过防止将数字数字的最低有效数字从存储器的计数器传送到存储器来减少从商店驱动的数字显示器中的闪烁 当与紧接在前的传送脉冲时的数字的相应数字进行比较时。 在优选实施例中，如果最低有效数字为“零”或“九”，则控制装置也可操作以防止整个数字数字响应于传送脉冲而转移到商店，并且传送最低有效数字 被阻止
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