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    • 52. 发明申请
    • CALIBRATION CIRCUIT FOR AN ADJUSTABLE CAPACITANCE
    • 用于可调节电容的校准电路
    • US20090051401A1
    • 2009-02-26
    • US12035235
    • 2008-02-21
    • Pierangelo ConfalonieriRiccardo MartignoneGermano Nicollini
    • Pierangelo ConfalonieriRiccardo MartignoneGermano Nicollini
    • H03L5/00
    • H03H7/0153H03H1/02H03H2210/021H03H2210/043
    • A calibration circuit for calibrating an adjustable capacitance of a circuit having a time constant depending on the adjustable capacitance, the calibration circuit generating a calibration signal for calibrating the capacitance and including a calibration loop, suitable to carry out a calibration cycle in several sequential steps. The calibration circuit includes a controllable capacitance for receiving a control signal and including an array of switched capacitors selectively activated by the control signal to connect to a first common node that conducts a voltage value depending on the total capacitance value of the activated capacitors; an assessment unit for comparing this voltage value with a reference voltage to output a logic signal that can transition between first and second logic levels; a control and timing unit to receive the logic signal and change the control signal to carry out a subsequent calibration step that is provided at the end of the integration interval during a comparison interval of a preset duration, which allows a transition of the logic signal to occur prior to the beginning of the consecutive calibration step.
    • 一种用于校准具有取决于可调电容的时间常数的电路的可调电容的校准电路,所述校准电路产生用于校准电容的校准信号,并且包括适于在几个连续步骤中执行校准循环的校准环路。 校准电路包括用于接收控制信号并包括由控制信号选择性激活的开关电容阵列的可控电容,以连接到第一公共节点,该第一公共节点根据所激活的电容器的总电容值传导电压值; 评估单元,用于将该电压值与参考电压进行比较,以输出可在第一和第二逻辑电平之间转换的逻辑信号; 控制和定时单元,用于接收逻辑信号并改变控制信号,以执行在预设持续时间的比较间隔期间在积分间隔结束时提供的随后的校准步骤,这允许将逻辑信号转换为 在连续校准步骤开始之前发生。
    • 53. 发明授权
    • Clock-pulse generator circuit
    • 时钟脉冲发生器电路
    • US07283005B2
    • 2007-10-16
    • US11055539
    • 2005-02-09
    • Pierangelo ConfalonieriMarco ZamprognoAngelo Nagari
    • Pierangelo ConfalonieriMarco ZamprognoAngelo Nagari
    • H03K3/03
    • H03H11/26H03K5/04H03K5/133H03K2005/00071H03K2005/00123H03K2005/00143H03K2005/00156H03K2005/00195
    • The circuit comprises a first ring oscillator comprising an odd number of inverting elements, a delay element and an output terminal; the delay element responds to a pulse at its input with a predetermined time delay with respect to a predetermined edge of the input pulse and substantially without time delay with respect to the other edge of the input pulse. With a view to avoiding start-up transients and generating pulses with a duty cycle that can be easily modified, the circuit comprises a second ring oscillator, having an output terminal connected to the output terminal of the first oscillator, and a bistable logic circuit having an output terminal connected to the common output of the first and the second oscillator. At least one of the inverting elements of the first oscillator and at least one of the inverting elements of the second oscillator form part of the bistable logic circuit.
    • 电路包括第一环形振荡器,其包括奇数个反相元件,延迟元件和输出端子; 延迟元件相对于输入脉冲的预定边缘以相对于输入脉冲的另一边缘基本上没有时间延迟的预定时间延迟在其输入端响应脉冲。 为了避免启动瞬变并产生可以容易地修改的占空比的脉冲,该电路包括具有连接到第一振荡器的输出端的输出端的第二环形振荡器和具有连接到第一振荡器的输出端的双稳态逻辑电路, 连接到第一和第二振荡器的公共输出端的输出端子。 第一振荡器的反相元件和第二振荡器的反相元件中的至少一个的至少一个构成双稳态逻辑电路的一部分。
    • 55. 发明授权
    • Method of operating SAR-type ADC and an ADC using the method
    • 使用该方法操作SAR型ADC和ADC的方法
    • US06720903B2
    • 2004-04-13
    • US10172376
    • 2002-06-14
    • Pierangelo ConfalonieriMarco ZamprognoFrancesca Girardi
    • Pierangelo ConfalonieriMarco ZamprognoFrancesca Girardi
    • H03M112
    • H03M1/181H03M1/468
    • A method of operating an SAR-type analog-to-digital converter to match the dynamic range of an input voltage signal to be converted with the full scale range of the converter, the converter including at least one array of binary weighted capacitors. The method includes the step of obtaining a digital gain code that represents the ratio between the full scale range and the dynamic range of the voltage signal to be converted, applying the voltage signal to be converted to the capacitor array so as to charge with the voltage signal to be converted only those array capacitors having the same binary weights as the bits of the gain code that have a selected binary value, and selectively coupling the capacitors of the array to one of a first and second predetermined reference voltage terminals according to an SAR technique, to obtain an output digital code corresponding to the input voltage signal.
    • 一种操作SAR型模数转换器以匹配要转换的输入电压信号的动态范围与转换器的满量程范围的方法,所述转换器包括至少一个二进制加权电容器阵列。 该方法包括获得数字增益代码的步骤,该数字增益代码表示满量程范围和要转换的电压信号的动态范围之间的比率,将要转换的电压信号施加到电容器阵列,以便对电压进行充电 信号仅转换具有与具有选定二进制值的增益码的位相同的二进制权重的阵列电容器,并且根据SAR选择性地将阵列的电容器耦合到第一和第二预定参考电压端子之一 技术,以获得对应于输入电压信号的输出数字代码。
    • 56. 发明授权
    • High resolution, high speed, low power switched capacitor digital to analog converter
    • 高分辨率,高速度,低功耗开关电容数字到模拟转换器
    • US06600437B1
    • 2003-07-29
    • US10115272
    • 2002-04-01
    • Pierangelo ConfalonieriMarco ZamprognoAngelo Nagari
    • Pierangelo ConfalonieriMarco ZamprognoAngelo Nagari
    • H03M166
    • H03M1/68H03M1/468H03M1/804
    • A switched capacitor digital to analog converter includes first and second converter segments having respective first and second arrays of binary weighted capacitors. Each capacitor of the first segment has a first electrode connected to a first common node and a second electrode connected through respective switches to one of first and second reference voltage terminals. Each capacitor of the second segment has a first electrode connected to a second common node and a second electrode connected through respective switches to one of the first and second reference voltage terminals. The converter includes a coupling capacitor connected between the first and second common nodes and capacitance means connected between the first common node and a reference voltage terminal. The coupling capacitor and capacitance means have capacitances, Cs and CATT respectively, that substantially satisfy the relationship: (2p−1)·Cs−CATT=2p·C, where p is the number of bits coded in the first converter segment and C is the unit capacitance.
    • 开关电容器数模转换器包括具有相应的第二和第二二进制加权电容器阵列的第一和第二转换器段。 第一段的每个电容器具有连接到第一公共节点的第一电极和通过各个开关连接到第一和第二参考电压端子之一的第二电极。 第二段的每个电容器具有连接到第二公共节点的第一电极和通过各个开关连接到第一和第二参考电压端子之一的第二电极。 该转换器包括连接在第一和第二公共节点之间的耦合电容器和连接在第一公共节点和参考电压端子之间的电容装置。 耦合电容器和电容装置分别具有电容Cs和CATT,其基本上满足以下关系:(2p-1).C-CATT = 2p.C,其中p是在第一转换器段中编码的位数,C是 单位电容。