专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20090261999A1 DEVICE AND METHOD FOR TESTING OF DIGITAL-TO-ANALOG CONVERTER 有权
标题翻译：用于测试数字到模拟转换器的设备和方法
公开(公告)号：US20090261999A1
公开(公告)日：2009-10-22
申请号：US12107502
申请日：2008-04-22
申请人： Ravi Ramaswami , Michael A. Bourland , Feng Zhao
发明人： Ravi Ramaswami , Michael A. Bourland , Feng Zhao
IPC分类号： H03M1/10
CPC分类号： H03M1/1095 , H03M1/742
摘要： A current-steering digital-to-analog converter (DAC) is tested using a test component having a relaxation oscillator with an oscillation frequency based on the output current of the DAC. A series of test values is provided in sequence to the DAC for conversion to an output current with a magnitude that varies with the test values. The test component counts the number of oscillations (“the oscillation count”) of the relaxation oscillator over a fixed duration that is substantially equal for each test value. As the number of oscillations over the fixed duration depends on the oscillation frequency of the relaxation oscillator, which in turn is based on the magnitude of the output current, the oscillation count can be used as a relative measure of the magnitude of the output current for the corresponding test value. Accordingly, the oscillation counts for the test values can be used to determine operational characteristics of the DAC.
摘要翻译：使用具有基于DAC的输出电流的振荡频率的张弛振荡器的测试部件来测试电流导向数模转换器（DAC）。一系列测试值依次提供给DAC，用于转换为具有随测试值变化的幅度的输出电流。测试组件对固定持续时间计数弛豫振荡器的振荡次数（“振荡计数”），其对于每个测试值基本相等。由于在固定持续时间内的振荡次数取决于张弛振荡器的振荡频率，而振荡器的振荡频率又依赖于输出电流的大小，所以振荡计数可以用作输出电流幅值的相对量度相应的测试值。因此，可以使用测试值的振荡计数来确定DAC的工作特性。

2. 发明授权

US07236014B1 Circuit and method for peak detection of an analog signal 有权
标题翻译：用于模拟信号峰值检测的电路和方法
公开(公告)号：US07236014B1
公开(公告)日：2007-06-26
申请号：US11297191
申请日：2005-12-07
申请人： Dale J. McQuirk , Michael A. Bourland
发明人： Dale J. McQuirk , Michael A. Bourland
IPC分类号： G01R19/00 , H03K5/153
CPC分类号： H03K5/003 , H03K5/1532
摘要： A fully differential peak detection circuit includes programmable sensitivity and an autozero function. The peak detector has a fully differential charge-coupled analog signal path. The entire analog signal path is autozeroed upon enable and/or in response to sensing a logic zero at the output, where the logic zero follows a logic one. The peak detector includes a differential gain stage for receiving an analog input signal. The differential gain stage includes offset error compensation. The offset error compensation is selected upon enable and/or in response to an output signal of the peak detection circuit and automatically zeros an offset error voltage in response to a predetermined logic state of the output signal. The output of the gain stage is provided to a comparator stage. A plurality of capacitors coupled to the comparator stage stores a predetermined voltage for setting a sensitivity of the peak detector. The sensitivity is programmable during an autozero sequence by applying a predetermined voltage to the plurality of capacitors.
摘要翻译：全差分峰值检测电路包括可编程灵敏度和自动归零功能。峰值检测器具有完全差分的电荷耦合模拟信号路径。在使能和/或响应于在输出处感测到逻辑零时，整个模拟信号路径被自动归零，其中逻辑0跟随逻辑1。峰值检测器包括用于接收模拟输入信号的差分增益级。差分增益级包括偏移误差补偿。在使能和/或响应于峰值检测电路的输出信号时选择偏移误差补偿，并响应于输出信号的预定逻辑状态自动将偏移误差电压置零。增益级的输出提供给比较器级。耦合到比较器级的多个电容器存储用于设置峰值检测器的灵敏度的预定电压。通过对多个电容器施加预定的电压，灵敏度可以在自动调零序列期间被编程。

3. 发明授权

US07609190B1 Device and method for testing of digital-to-analog converter 有权
标题翻译：数模转换器测试装置及方法
公开(公告)号：US07609190B1
公开(公告)日：2009-10-27
申请号：US12107502
申请日：2008-04-22
申请人： Ravi Ramaswami , Michael A. Bourland , Feng Zhao
发明人： Ravi Ramaswami , Michael A. Bourland , Feng Zhao
IPC分类号： H03M1/66
CPC分类号： H03M1/1095 , H03M1/742
摘要： A current-steering digital-to-analog converter (DAC) is tested using a test component having a relaxation oscillator with an oscillation frequency based on the output current of the DAC. A series of test values is provided in sequence to the DAC for conversion to an output current with a magnitude that varies with the test values. The test component counts the number of oscillations (“the oscillation count”) of the relaxation oscillator over a fixed duration that is substantially equal for each test value. As the number of oscillations over the fixed duration depends on the oscillation frequency of the relaxation oscillator, which in turn is based on the magnitude of the output current, the oscillation count can be used as a relative measure of the magnitude of the output current for the corresponding test value. Accordingly, the oscillation counts for the test values can be used to determine operational characteristics of the DAC.
摘要翻译：使用具有基于DAC的输出电流的振荡频率的张弛振荡器的测试部件来测试电流导向数模转换器（DAC）。一系列测试值依次提供给DAC，用于转换为具有随测试值变化的幅度的输出电流。测试组件对固定持续时间计数弛豫振荡器的振荡次数（“振荡计数”），其对于每个测试值基本相等。由于在固定持续时间内的振荡次数取决于张弛振荡器的振荡频率，而振荡器的振荡频率又依赖于输出电流的大小，所以振荡计数可以用作输出电流幅值的相对量度相应的测试值。因此，可以使用测试值的振荡计数来确定DAC的工作特性。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式