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公开(公告)号：US4924227A
公开(公告)日：1990-05-08
申请号：US283791
申请日：1988-12-13
Applicant: Christopher W. Mangelsdorf
Inventor： Christopher W. Mangelsdorf
Abstract: The apparatus comprises a parallel analog-to-digital converter comprising a matrix of differentially coupled transistor pairs wherein the base of one transistor of each differential pair is coupled to a reference voltage and the base of the other transistor of each differential pair is coupled to the input voltage through a specified offset. In each row of differential pairs, the collectors of the transistors are alternately coupled to first and second row output points. The first and second row output points of each row are coupled to the inverting and non-inverting inputs, respectively of a comparator. Additional comparators are provided for comparing the second row output of each row with the first row output of the succeeding row. The matrix is arranged such that the combination of the comparator outputs is unique for each possible digital level in the full scale range of the converter. Logic circuitry is coupled to the comparator outputs to produce a computer usable code therefrom.
Abstract translation: 该装置包括并行模数转换器，其包括差分耦合晶体管对的矩阵，其中每个差分对的一个晶体管的基极耦合到参考电压，并且每个差分对的另一个晶体管的基极耦合到 输入电压通过指定的偏移。 在每行差分对中，晶体管的集电极交替耦合到第一和第二行输出点。 每行的第一和第二行输出点分别耦合到比较器的反相和非反相输入。 提供了其他比较器，用于将每行的第二行输出与后续行的第一行输出进行比较。 矩阵被布置成使得比较器输出的组合对于转换器的满量程范围内的每个可能的数字电平是唯一的。 逻辑电路被耦合到比较器输出端以从其产生计算机可用代码。
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公开(公告)号：US4897647A
公开(公告)日：1990-01-30
申请号：US251377
申请日：1988-09-13
Applicant: Keiji Sakamoto , Akihito Nakayama
Inventor： Keiji Sakamoto , Akihito Nakayama
CPC classification number: H03M1/206 , G01D5/24404 , H03M1/303
Abstract: There are provided a method and an apparatus for absolute position detection, in which position detection is performed with high accuracy by interpolation between feedback pulses generated as an object of position detection moves, and the power-on command displacement can be calculated with high accuracy, the method and the apparatus entailing only small electric power consumption. A stored value in an absolute counter (2), which is indicative of an approximate absolute position of an object of position detection, is updated each time a feedback pulse is generated from a feedback pulse generating circuit (1), and is retentively stored in the counter even after the power is turned off. As the object of position detection moves, moreover, the count value of interpolation pulses, generated during the time interval which elapses from the instant that the power is turned on again until the first one of the feedback pulses is generated, is temporarily stored in a correction counter (5). The power-on absolute position of the object of position detection is calculated by means of a numerical control unit (20), in accordance with the stored value, the count value, and the moving direction designated by a movement command delivered when the power is turned on. Further, the apparatus calculates the command displacement on the basis of the calculated absolute position and a command target position.
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公开(公告)号：US4823000A
公开(公告)日：1989-04-18
申请号：US100020
申请日：1987-09-23
Applicant: Peter D. Onyon
Inventor： Peter D. Onyon
Abstract: In a position encoder an interpolator derives from quadrature input signals a series of sine waves equispaced in phase. These are applied to respective comparators which output a binary zero or a binary one according to whether the respective sine wave is above or below the zero crossing point. Interpolation is achieved by identifying an adjacent pair of said sine waves of which one has a value above and the other a value below zero and a counter stores a number indicative of this pair of signals.
Abstract translation: 在位置编码器中，内插器从正交输入信号中产生一系列相位相等的正弦波。 这些被应用于根据相应的正弦波是否在过零点之上或之下输出二进制零或二进制的相应比较器。 插值是通过识别一个相邻的正弦波对，其中一个具有高于上述值的值，另一个值低于零，并且计数器存储指示该对信号对的数字。
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