公开(公告)号：US06529355B1

公开(公告)日：2003-03-04

申请号：US09605139

申请日：2000-06-27

申请人： Al Becker ,  Bakul Damle

发明人： Al Becker ,  Bakul Damle

IPC分类号： H02H900

CPC分类号： H02H9/025 ,  G01R1/36

摘要： A circuit that protects a current shunt or any analog measuring circuit without the implementation of fuses. In a particular embodiment, a circuit comprises a current shunt and a plurality of transistors that may be configured to function as a fuse. One of the transistors may be deactivated once the input voltage exceeds a negative threshold voltage. The other transistor may be deactivated once the input voltage exceeds a positive threshold voltage. By deactivating the transistors once the input voltage exceeds a negative or a positive threshold voltage, the transistors are configured to function as a fuse and provide input protection for a current shunt or for any analog measuring circuit. In another particular embodiment, a circuit provides protection for a first and second current shunt where the second current shunt is less in resistance than the first current shunt. The circuit further comprises a plurality of transistors that may be configured to function as a fuse. The circuit further comprises a current limiter to protect the second current shunt at a second range and a voltage limiter to protect the current limiter at a first range, where the second range is smaller than the first range. The voltage limiter operates to deactivate the transistors once the input voltage exceeds a negative or positive voltage threshold of the first range. The current limiter operates to limit the current flowing through the transistors once the input voltage exceeds a negative or positive voltage threshold of the second range.

摘要翻译： 保护电流分流器或任何模拟测量电路而不实施保险丝的电路。 在特定实施例中，电路包括电流分流器和可被配置为用作保险丝的多个晶体管。 一旦输入电压超过负阈值电压，晶体管中的一个可以被去激活。 一旦输入电压超过正阈值电压，另一个晶体管可以被去激活。 一旦输入电压超过负阈值电压或正阈值电压，晶体管就被激活，因此晶体管被配置为用作保险丝并为电流分路或任何模拟测量电路提供输入保护。 在另一个具体实施例中，电路为第一和第二电流分路提供保护，其中第二电流分流器的电阻小于第一电流分流器。 电路还包括可被配置为用作保险丝的多个晶体管。 电路还包括限流器，用于保护在第二范围的第二电流分流器和电压限制器，以在第二范围小于第一范围的第一范围内保护限流器。 一旦输入电压超过第一范围的负电压或正电压阈值，电压限制器就操作来去激活晶体管。 一旦输入电压超过第二范围的负电压或正电压阈值，电流限制器操作来限制流过晶体管的电流。

公开(公告)号：US07016796B2

公开(公告)日：2006-03-21

申请号：US10452743

申请日：2003-06-02

申请人： Bakul Damle ,  Christopher G. Regier ,  Scott Borisch

发明人： Bakul Damle ,  Christopher G. Regier ,  Scott Borisch

IPC分类号： G06F15/00

CPC分类号： G01R19/02 ,  G01R19/2506

摘要： A small microcontroller or a DSP may be used to process digital signals representative of a measurement. Furthermore, special RMS AC measurement or DC noise rejection algorithms may have to be run on the microcontroller or the DSP. Other implementations may use custom digital logic, such as FPGAs, to process the digital signals. The DSP may not have enough capacity to store and process all data at the same time. Certain physical limitations are inherent to the DSP architectures, such as the trade-off of on-board memory size vs. speed, power consumption, and physical chip size. As a result, the RMS AC Measurement and the DC Noise rejection algorithms enable computational devices such as DSP's to perform sophisticated and accurate RMS measurements for waveforms ranging from DC to high frequency. The RMS AC Measurement and the DC Noise rejection algorithms uses on the on-the-fly computation of interpolated window values. As a result, the RMS AC Measurement and the DC Noise rejection algorithms can use any window, rather than being constrained to computationally efficient sincN windows.

摘要翻译： 可以使用小型微控制器或DSP来处理表示测量的数字信号。 此外，特殊RMS交流测量或直流噪声抑制算法可能必须在微控制器或DSP上运行。 其他实现可以使用诸如FPGA之类的定制数字逻辑来处理数字信号。 DSP可能没有足够的能力同时存储和处理所有数据。 某些物理限制是DSP架构固有的，例如板载内存大小与速度，功耗和物理芯片尺寸的权衡。 因此，RMS交流测量和直流噪声抑制算法使诸如DSP之类的计算设备可以对从DC到高频的波形执行复杂而精确的RMS测量。 RMS AC测量和DC噪声抑制算法在内插窗口值的实时计算中使用。 因此，RMS AC测量和DC噪声抑制算法可以使用任何窗口，而不是被限制在计算上有效的SIN N N / O窗口。