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    • 91. 发明申请
    • Class AB digital to analog converter/line driver
    • AB类数模转换器/线路驱动器
    • US20040140830A1
    • 2004-07-22
    • US10720144
    • 2003-11-25
    • Broadcom Corporation
    • Jan MulderYee Ling Cheung
    • H03K005/22
    • H03K17/04106H03M1/146H03M1/204H03M1/365H03M1/742H04L25/026H04L25/0276
    • A differential line driver includes first, second, third and fourth cascode transistors connected in parallel, wherein drains of the first and third transistors are connected to a negative output of the differential line driver, and wherein drains of the second and fourth transistors are connected to a positive output of the differential line driver. First, second, third and fourth switching transistors are connected in series with corresponding first, second, third and fourth cascode transistors and driven by a data signal. First and second compound transistors inputting a class AB operation signal at their gates, wherein the first compound transistor is connected to sources of the first and second switching transistors, and wherein the second compound transistor is connected to sources of the third and fourth switching transistors.
    • 差分线路驱动器包括并联连接的第一,第二,第三和第四共源共栅晶体管,其中第一和第三晶体管的漏极连接到差分线路驱动器的负输出,并且其中第二和第四晶体管的漏极连接到 差分线路驱动器的正输出。 第一,第二,第三和第四开关晶体管与对应的第一,第二,第三和第四共源共栅晶体管串联连接并由数据信号驱动。 第一和第二复合晶体管在其栅极处输入AB类操作信号,其中第一复合晶体管连接到第一和第二开关晶体管的源极,并且其中第二复合晶体管连接到第三和第四开关晶体管的源极。
    • 93. 发明授权
    • High speed analog to digital converter
    • 高速模数转换器
    • US06674388B2
    • 2004-01-06
    • US10349073
    • 2003-01-23
    • Jan Mulder
    • Jan Mulder
    • H03M114
    • H03M1/0863H03K17/04106H03M1/146H03M1/204H03M1/36H03M1/365
    • An analog to digital converter includes a reference ladder, a track-and-hold amplifier tracking an input signal with its output signal during the phase &phgr;1 and holding a sampled value during, a coarse analog to digital converter having a plurality of coarse amplifiers each inputting a corresponding tap from the reference ladder and the output signal, a fine analog-to-digital converter having a plurality of fine amplifiers inputting corresponding taps from the reference ladder and the output signal, the taps selected based on outputs of the coarse amplifiers, a clock having phases &phgr;1 and &phgr;2, a circuit responsive to the clock that receives the output signal, the circuit substantially passing the output signal and the corresponding taps to the fine amplifiers during the phase &phgr;2 and substantially rejecting the output signal and the corresponding taps during the phase &phgr;1, and an encoder converting outputs of the coarse and fine amplifiers to an N-bit digital signal representing the input signal.
    • 模数转换器包括参考梯形图,跟踪和保持放大器,在相位phi1期间跟踪具有其输出信号的输入信号并保持采样值,粗略模数转换器具有多个粗放大器,每个粗放大器输入 来自参考梯形图和输出信号的对应抽头,具有多个精细放大器的精细模数转换器,该精细放大器从参考梯形图输入相应的抽头和输出信号,基于粗放大器的输出选择的抽头, 具有相位phi1和phi2的时钟,响应于接收输出信号的时钟的电路,电路在相位phi2期间基本上将输出信号和相应的抽头传递到精细放大器,并在该期间基本上拒绝输出信号和对应的抽头 相位phi1和将粗略和精细放大器的输出转换成表示th的N位数字信号的编码器 e输入信号。
    • 94. 发明申请
    • ANALOG-TO-DIGITAL CONVERTER
    • 模拟数字转换器
    • US20030234735A1
    • 2003-12-25
    • US10176695
    • 2002-06-20
    • Robert William Kressin
    • H03M001/12H03M001/34
    • H03M1/146H03M1/365
    • Disclosed herein is an analog-to-digital converter having first and second comparator stages, a voltage reference stage, a switching stage, and an encoder. The first comparator stage receives an analog signal and a threshold and outputs a control signal. The voltage reference stage receives the control signal and outputs one of two or more sets of reference voltages. The second comparator stage receives the analog signal, as well as the set of reference voltages output from the voltage reference stage, and outputs a thermometer code in response to comparisons of the analog signal to the reference voltages. The switching stage receives the control signal, and in response thereto, variously couples inputs of the encoder to: bits of the thermometer code output from the second comparator stage, a first potential, or a second potential. Methods for converting analog signals to digital signals are also disclosed.
    • 这里公开了具有第一和第二比较器级,电压基准级,开关级和编码器的模拟 - 数字转换器。 第一比较器级接收模拟信号和阈值并输出控制信号。 电压基准级接收控制信号并输出​​两组或更多组参考电压之一。 第二比较器级接收模拟信号以及从电压基准级输出的一组参考电压,并且响应于模拟信号与参考电压的比较而输出温度计代码。 开关级接收控制信号,并且响应于此,将编码器的输入端各种耦合到从第二比较器级输出的温度计代码的位,第一电位或第二电位。 还公开了将模拟信号转换为数字信号的方法。
    • 100. 发明授权
    • Sub-ranging analog-to-digital converter
    • 子范围模数转换器
    • US5459465A
    • 1995-10-17
    • US140675
    • 1993-10-21
    • Mark R. Kagey
    • Mark R. Kagey
    • H03M1/14H03M1/36H03M1/20
    • H03M1/146H03M1/365
    • The present invention provides a sub-ranging analog-to-digital (A/D) converter with improved speed and power consumption characteristics relative to known sub-ranging converters. The sub-ranging A/D converter utilizes information relating to the values of the bits determined in one stage to define the range of operation for a subsequent stage. In one embodiment, the subsequent stage utilizes three-input comparators in determining the value of a bit. Two of the inputs are used to receive signals representative of the upper and lower limits of the range of operation that has been determined by the prior stage and the other input is used to receive the analog signal. The three-input comparator operates to produce an output signal that is indicative of the relationship of the analog signal to a threshold level within the defined range of operation determined by the prior stage.
    • 本发明提供了一种相对于已知子范围转换器具有改进的速度和功耗特性的子范围模数(A / D)转换器。 子范围A / D转换器利用与一级中确定的位的值有关的信息来定义后续级的操作范围。 在一个实施例中,后续级利用三输入比较器来确定位的值。 两个输入用于接收表示由前一级确定的操作范围的上限和下限的信号,另一个输入用于接收模拟信号。 三输入比较器操作以产生一个输出信号,该输出信号指示模拟信号与在前一阶段确定的确定的操作范围内的阈值水平的关系。