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    • 3. 发明授权
    • Parallel-process digital modulator structures and methods
    • 并行处理数字调制器结构和方法
    • US06621366B1
    • 2003-09-16
    • US10013131
    • 2001-12-07
    • Ken Gentile
    • Ken Gentile
    • H03C300
    • H03C3/40
    • In order to generate a carrier frequency Fc, a digital modulator must operate (to satisfy the Nyquist criteria) at a system sample rate Rs which is at least twice the carrier frequency Fc. However, digital modulator structures are provided herein that facilitate the use of M quadrature modulators which modulate, at a reduced modulation rate Rs/M, respective ones of M polyphase cosine elements and M polyphase sine elements with respective ones of interpolated I elements and interpolated Q elements to thereby form M polyphase modulated elements. The modulated elements are then sequentially selected in a multiplexer to form a modulated digital signal. The reduced modulation rate simplifies modulator design and lowers fabrication costs.
    • 为了产生载波频率Fc,数字调制器必须以至少是载波频率Fc的两倍的系统采样率Rs操作(以满足奈奎斯特准则)。 然而,本文提供的数字调制器结构有助于使用M个正交调制器,其以降低的调制速率Rs / M调制M个多相余弦元素和M个多相正弦元件中的相应内插I元素和内插Q 从而形成M多相调制元件。 然后在多路复用器中顺序选择调制元件以形成调制数字信号。 降低的调制速率简化了调制器设计并降低了制造成本。
    • 4. 发明授权
    • Voltage monitor for in-circuit testing
    • 用于在线测试的电压监视器
    • US4977530A
    • 1990-12-11
    • US189180
    • 1988-05-02
    • John ClineKen Gentile
    • John ClineKen Gentile
    • G01R31/28
    • G01R31/2834
    • In a circuit tester for applying test voltage to circuit components, a voltage monitor for detecting potentially destructive voltages being applied to one or more additional circuit components other than the components being tested, and in response generating an alarm signal for interrupting the circuit tester, thereby inhibiting generation of the destructive voltages. Monitored input voltages are compared to selectable positive and negative threshold voltages defining upper and lower polarity sensitive destructive voltage limits.
    • 在用于向电路部件施加测试电压的电路测试器中,用于检测潜在的破坏性电压的电压监视器被施加到除被测试部件之外的一个或多个附加电路部件,并且响应于产生用于中断电路测试器的报警信号,从而 抑制破坏性电压的产生。 将监控的输入电压与定义上限和下限极性敏感的破坏性电压限制的可选正和负阈值电压进行比较。
    • 7. 发明授权
    • Digitally-realized signal generators and methods
    • 数字实现的信号发生器和方法
    • US07034624B1
    • 2006-04-25
    • US10734391
    • 2003-12-11
    • Ken Gentile
    • Ken Gentile
    • H03L7/00
    • H03L7/183H03L2207/50
    • Signal generators are realized with combinations of a digital synthesizer (e.g., direct digital synthesizer), a frequency controller and a phase controller. The frequency controller receives a user-provided minimum count of a reference frequency wherein the minimum count is chosen to initially position a synthesizer signal within a selected frequency error of the reference frequency. In response, the frequency controller runs counters over a time sufficient to obtain the minimum count. The frequency controller then uses a difference count between the counts of the reference frequency and the synthesizer frequency to determine a controlled tuning word that properly positions the synthesizer signal. Subsequently, the phase controller detects phase differences between the reference signal and the synthesizer signal and applies phase correction signals to control the phase of the synthesizer signal.
    • 信号发生器通过数字合成器(例如,直接数字合成器),频率控制器和相位控制器的组合来实现。 频率控制器接收用户提供的参考频率的最小计数,其中选择最小计数以将合成器信号初始定位在参考频率的选定频率误差内。 作为响应,频率控制器运行计数器足够长的时间以获得最小计数。 然后,频率控制器使用参考频率和合成器频率的计数之间的差分计数来确定适当地定位合成器信号的受控调谐字。 随后,相位控制器检测参考信号和合成器信号之间的相位差,并施加相位校正信号以控制合成器信号的相位。
    • 8. 发明授权
    • Digital filter methods and structures for increased processing rates
    • 数字滤波方法和结构,用于提高处理速率
    • US07013319B1
    • 2006-03-14
    • US09989283
    • 2001-11-20
    • Ken Gentile
    • Ken Gentile
    • G06F17/10
    • H03H17/06H03H17/0223H03H2017/0247
    • Digital filters are provided that include a converter and a data processor. The converter converts successive strings of M successive data elements that occur at a system rate Fs in an input data stream Din to M parallel data elements that respectively occur at a substream rate Fs/M in M data substreams Dsbstrm. At a reduced substream rate Fs/M, the processor generates M convolutions of the filter's quantized impulse response with the M data substreams wherein each of the convolutions is arranged to generate a different one of M successive filtered output signals. Because the convolutions are conducted at the reduced substream rate Fs/M, the filters can operate at increased system rates. Preferably, the digital filter also includes a multiplexer that selects, at the system rate Fs, the M filtered output signals in successive order to thereby form a filtered output data stream Dout.
    • 提供了包括转换器和数据处理器的数字滤波器。 转换器将在中的输入数据流D 中以系统速率F S发生的M个连续数据元素的连续字符串转换为分别在子流中发生的M个并行数据元素 速率F S / S / M在M个数据子流D Sbstrm 中。 在减少的子流速率F N / M,处理器产生M个数据子流的滤波器的量化脉冲响应的M个卷积,其中每个卷积被布置成产生M个连续滤波输出中的不同的一个 信号。 由于卷积以降低的子流速率F N / M进行,滤波器可以以增加的系统速率工作。 优选地,数字滤波器还包括多路复用器,其以系统速率F S连续地选择M个经过滤波的输出信号,从而形成滤波后的输出数据流D
    • 10. 发明授权
    • Multiphase, interleaved direct digital synthesis methods and structures
    • 多相交错直接数字合成方法和结构
    • US06587863B1
    • 2003-07-01
    • US09605099
    • 2000-06-27
    • Ken GentileJohn Kornblum
    • Ken GentileJohn Kornblum
    • G06F102
    • G06F1/0328
    • Direct digital synthesis (DDS) methods and structures are provided that increase DDS output frequencies fout without requiring a corresponding increase in the rate fclk at which DDS structures must operate. An exemplary method generates a periodic stream of digital words at a clock frequency fclk wherein the words represent respective amplitudes of a predetermined periodic waveform, the periodic stream has a period P and the digital words are spaced by a phase step &phgr;s. This method comprises the steps of a) with a count capacity C, counting modulo n&phgr;s at a reduced clock frequency (1/n)fclk to thereby generate a primary substream of digital words, b) phase offsetting the primary substream to form n−1 secondary substreams of digital words wherein the primary and secondary substreams are phase spaced by the phase step &phgr;s, c) converting the digital words of each of the primary, and secondary substreams to converted digital words that represent respective amplitudes of the predetermined waveform, and d) interleaving the primary and secondary substreams to thereby form the periodic stream of digital words that occur at the clock frequency fclk.
    • 提供直接数字合成(DDS)方法和结构,其增加DDS输出频率fout,而不需要DDS结构必须操作的速率fclk的相应增加。 一种示例性方法在时钟频率fclk处产生数字字的周期性流,其中字表示预定周期波形的各个幅度,周期流具有周期P,数字字由相位步长隔开。 该方法包括以下步骤:a)具有计数能力C,以降低的时钟频率(1 / n)fclk对模数nphis进行计数,从而产生数字字的主子流,b)相位偏移主子流以形成n-1 数字字的二次子流,其中主和次级子流由相位步长相位相隔,c)将主和次级子流中的每一个的数字字转换成表示预定波形的各个幅度的转换数字字,d )对主流和次级流进行交织,从而形成在时钟频率fclk出现的数字字的周期流。