公开(公告)号：US5093654A

公开(公告)日：1992-03-03

申请号：US353102

申请日：1989-05-17

Applicant: Steven D. Swift ,  Roger E. Baker

Inventor： Steven D. Swift ,  Roger E. Baker

IPC: G05F1/46 ,  G09G3/30 ,  H02M3/337

CPC classification number: H02M3/3378 ,  G05F1/468 ,  G09G3/30 ,  G09G2320/0204 ,  G09G2320/043 ,  G09G2320/0606 ,  G09G2320/0626

Abstract: A power supply system for controlling the drive voltages applied to a thin film electroluminescent (TFEL) display panel is disclosed. The system includes a power supply that generates the drive voltages to the TFEL display panel and causes it to emit light. A replaceable or resettable display voltage memory located adjacent the display panel provides the power supply with voltage information specific to the display panel. A feedback circuit measures the light emitted from the display panel. A balancing circuit controls multiple display voltages so that they have the proper relationship with respect to each other. The information from the display voltage memory and the feedback circuit is used by the power supply to control the output of the display voltages.

Abstract translation: 公开了一种用于控制施加到薄膜电致发光（TFEL）显示面板的驱动电压的电源系统。 该系统包括一个向TFEL显示面板产生驱动电压并使其发光的电源。 位于显示面板附近的可更换或可重置的显示电压存储器为电源提供特定于显示面板的电压信息。 反馈电路测量从显示面板发出的光。 平衡电路控制多个显示电压，使得它们彼此之间具有适当的关系。 电源使用来自显示电压存储器和反馈电路的信息来控制显示电压的输出。

公开(公告)号：US5930745A

公开(公告)日：1999-07-27

申请号：US840086

申请日：1997-04-09

Applicant: Steven D. Swift

Inventor： Steven D. Swift

IPC: G01R19/00 ,  G01R19/25 ,  G01D3/00

CPC classification number: G01R19/2509 ,  G01R19/2503

Abstract: A front-end architecture is provided for a measurement instrument having a single path for the input signal for conversion into digital samples. A signal conditioner may be coupled via a pair of test leads across a voltage source, current source, or component to develop an input signal. The input signal is provided to a sampling system, which comprises a sigma-delta converter followed by a decimation filter, which over-samples the input signal to produce a continuous stream of digital samples. The digital samples are provided to a set of digital extraction filters, each digital extraction filter having a structure and transfer function adapted for extracting a measurement parameter from the stream of digital samples. Parameter extraction is performed on a continuous basis so that the digital samples and the resulting digital measurement values arrive in a continuous stream. Extracted parameters include the d.c. value of the input signal, the rms value of the input signal, the waveform parameters of the input signal, and the peak min/max values of the input signal.

Abstract translation: 为测量仪器提供了前端架构，该测量仪器具有用于转换为数字采样的输入信号的单一路径。 信号调节器可以经由跨越电压源，电流源或组件的一对测试引线耦合以形成输入信号。 输入信号被提供给采样系统，该采样系统包括一个Σ-Δ转换器，随后是抽取滤波器，该滤波器对输入信号进行过采样以产生连续的数字样本流。 将数字样本提供给一组数字提取滤波器，每个数字提取滤波器具有适于从数字样本流中提取测量参数的结构和传递函数。 在连续的基础上执行参数提取，使得数字样本和所得到的数字测量值以连续的流到达。 提取的参数包括d.c. 输入信号的值，输入信号的有效值，输入信号的波形参数以及输入信号的峰值最小/最大值。

公开(公告)号：US5698984A

公开(公告)日：1997-12-16

申请号：US594065

申请日：1996-01-30

Applicant: Erik R. Little ,  Steven D. Swift ,  Greg S. Gibson

Inventor： Erik R. Little ,  Steven D. Swift ,  Greg S. Gibson

IPC: G01R1/28 ,  G01R15/12 ,  G01R19/25 ,  G01R35/00 ,  H03H17/02 ,  H03H17/06 ,  H03H21/00

CPC classification number: H03H21/0012 ,  G01R1/28 ,  G01R15/125 ,  G01R35/005

Abstract: An adaptive digital filter is provided to obtain improved measurement accuracy in an electronic instrument which has a front-end circuit for coupling to an input signal to be measured. An analog to digital converter converts the input signal received through the front-end circuit into a stream of measurement values during the measurement phase. The stream of measurement values are then provided to the adaptive digital filter which mathematically operates on them to remove the frequency response effects of the front-end circuit in a process of convolution in the time domain using a set of digital filter values obtained during the calibration phase. Because the frequency response requirements of the front-end circuit have been eased with the addition of the adaptive digital filter, a simpler front-end circuit with fewer components and with no need for manual adjustment may be employed in electronic instruments.

Abstract translation: 提供了一种自适应数字滤波器，以在电子仪器中获得改进的测量精度，该电子仪器具有用于耦合到待测量的输入信号的前端电路。 模数转换器在测量阶段将通过前端电路接收的输入信号转换为测量值流。 然后将测量值流提供给数学上对其进行操作的自适应数字滤波器，以使用在校准期间获得的一组数字滤波器值在时域中卷积的过程中去除前端电路的频率响应效应 相。 由于通过增加自适应数字滤波器，前端电路的频率响应要求得到了缓解，因此可以在电子仪器中采用具有较少元件的更简单的前端电路，而不需要手动调整。

公开(公告)号：US5418464A

公开(公告)日：1995-05-23

申请号：US97439

申请日：1993-07-26

Applicant: Steven D. Swift

Inventor： Steven D. Swift

IPC: G01P15/00 ,  G01D21/00 ,  G01K7/02 ,  G01R31/00 ,  G01R31/02 ,  G08C25/00

CPC classification number: G01K7/026

Abstract: An improved open circuit detector for testing a thermocouple for an open circuit condition. The detector includes a generator for providing and sourcing a tone signal to the thermocouple, wherein the tone signal has a known frequency and amplitude. A monitor analyzes the amplitude of a particular frequency component of a tone signal across the thermocouple. If the amplitude of the particular frequency component exceeds a predetermined threshold, an output is provided for indicating an open circuit condition for the thermocouple.

Abstract translation: 一种改进的开路检测器，用于测试开路条件下的热电偶。 检测器包括用于向热电偶提供和提取音调信号的发生器，其中音调信号具有已知的频率和幅度。 监视器分析跨过热电偶的音调信号的特定频率分量的振幅。 如果特定频率分量的幅度超过预定阈值，则提供用于指示热电偶的开路状态的输出。

公开(公告)号：US4445111A

公开(公告)日：1984-04-24

申请号：US187442

申请日：1980-09-15

Applicant: Steven D. Swift ,  Jonathan J. Parle ,  David A. Gunderson

Inventor： Steven D. Swift ,  Jonathan J. Parle ,  David A. Gunderson

IPC: H03M1/00 ,  H03K13/02

CPC classification number: H03M1/02

Abstract: Bi-polar electronic signal converters, such as analog-to-digital or digital-to-analog converters, with a single polarity accurate reference source are disclosed. In one polarity direction, the accurate reference source is used in a conventional manner to transform the signal to be converted from one form (e.g., analog) to the other form (e.g., digital). In the other polarity direction, an inaccurate reference source is used in a similar conventional manner to convert the signal from one form to the other form. Periodically, the accurate and the inaccurate reference sources are compared to determine a correction multiplier. The correction multiplier is used during conversions using the inaccurate reference source to compensate for the inaccuracy of the inaccurate reference source.

Abstract translation: 公开了具有单极性精确参考源的双极性电子信号转换器，例如模拟数字或数模转换器。 在一个极性方向上，以常规方式使用精确参考源，以将要转换的信号从一种形式（例如，模拟）转换成另一种形式（例如，数字）。 在另一极性方向上，以相似的常规方式使用不准确的参考源，以将信号从一种形式转换成另一种形式。 周期性地比较精确和不精确的参考源以确定校正乘数。 使用不准确的参考源在转换期间使用校正乘数来补偿不准确的参考源的不准确性。