-
公开(公告)号：US08933745B2
公开(公告)日：2015-01-13
申请号：US13980355
申请日：2012-05-29
申请人： Jianhui Wu , Xiao Shi , Chao Chen , Zhilin Liu , Qiang Zhao , Junfeng Wen , Xudong Wang , Chunfeng Bai , Qian Tian
发明人： Jianhui Wu , Xiao Shi , Chao Chen , Zhilin Liu , Qiang Zhao , Junfeng Wen , Xudong Wang , Chunfeng Bai , Qian Tian
CPC分类号： H03H11/0466 , H03D7/1441 , H03D7/1466
摘要： A transconductance-enhancing passive frequency mixer comprises a transconductance amplification stage, a frequency mixing stage, and an output transresistance amplifier. The transconductance amplification stage has a pre-amplification transconductance-enhancing structure, so that the transconductance is greatly enhanced, thereby obtaining the same transconductance value at a lower bias current. A radio-frequency current is modulated by the frequency mixing stage to generate an output mid-frequency current signal. The mid-frequency current signal passes through the transresistance amplifier, to form voltage output, and finally obtain a mid-frequency voltage signal. The transresistance amplifier has a transconductance-enhancing structure, thereby further reducing input impedance, and improving current utilization efficiency and port isolation. The frequency mixer has the characteristics of low power consumption, high conversion gain, good port isolation, and the like.
摘要翻译： 跨导增强型无源混频器包括跨导放大级，频率混频级和输出跨阻放大器。 跨导放大级具有预放大跨导增强结构，使得跨导大大增强，从而在较低偏置电流下获得相同的跨导值。 射频电流由混频级调制以产生输出中频电流信号。 中频电流信号通过跨阻放大器，形成电压输出，最后得到中频电压信号。 跨阻放大器具有跨导增强结构，从而进一步降低输入阻抗，提高电流利用效率和端口隔离。 该混频器具有低功耗，高转换增益，良好的端口隔离等特点。
-
公开(公告)号：US20130285715A1
公开(公告)日：2013-10-31
申请号：US13980355
申请日：2012-05-29
申请人： Jianhui Wu , Xiao Shi , Chao Chen , Zhilin Liu , Qiang Zhao , Junfeng Wen , Xudong Wang , Chunfeng Bai , Qian Tian
发明人： Jianhui Wu , Xiao Shi , Chao Chen , Zhilin Liu , Qiang Zhao , Junfeng Wen , Xudong Wang , Chunfeng Bai , Qian Tian
IPC分类号： H03H11/04
CPC分类号： H03H11/0466 , H03D7/1441 , H03D7/1466
摘要： A transconductance-enhancing passive frequency mixer comprises a transconductance amplification stage, a frequency mixing stage, and an output transresistance amplifier. The transconductance amplification stage has a pre-amplification transconductance-enhancing structure, so that the transconductance is greatly enhanced, thereby obtaining the same transconductance value at a lower bias current. A radio-frequency current is modulated by the frequency mixing stage to generate an output mid-frequency current signal. The mid-frequency current signal passes through the transresistance amplifier, to form voltage output, and finally obtain a mid-frequency voltage signal. The transresistance amplifier has a transconductance-enhancing structure, thereby further reducing input impedance, and improving current utilization efficiency and port isolation. The frequency mixer has the characteristics of low power consumption, high conversion gain, good port isolation, and the like.
摘要翻译： 跨导增强型无源混频器包括跨导放大级，频率混频级和输出跨阻放大器。 跨导放大级具有预放大跨导增强结构，使得跨导大大增强，从而在较低偏置电流下获得相同的跨导值。 射频电流由混频级调制以产生输出中频电流信号。 中频电流信号通过跨阻放大器，形成电压输出，最后得到中频电压信号。 跨阻放大器具有跨导增强结构，从而进一步降低输入阻抗，提高电流利用效率和端口隔离。 该混频器具有低功耗，高转换增益，良好的端口隔离等特点。
-
公开(公告)号：US20130307711A1
公开(公告)日：2013-11-21
申请号：US13983297
申请日：2012-05-29
申请人： Jianhui Wu , Zixuan Wang , Xiao Shi , Meng Zhang , Cheng Huang , Chao Chen , Fuqing Huang , Xincun Ji , Ping Jiang
发明人： Jianhui Wu , Zixuan Wang , Xiao Shi , Meng Zhang , Cheng Huang , Chao Chen , Fuqing Huang , Xincun Ji , Ping Jiang
IPC分类号： H03M1/04
CPC分类号： H03M1/04 , G04F10/005
摘要： A stochastic time-digital converter (STDC) including an input switching circuit, an STDC array, and an encoder. A clock circuit inputs two clock signals into two input terminals of the input switching circuit; the input switching circuit transmits the two clock signals in a cyclic cross-transposition form to two input terminals of the STDC array, and simultaneously outputs a trigger control signal to the encoder; each comparator in the STDC array independently judges the speeds of the two clock signals and sends the judgement results to the encoder for collection and processing; and the encoder outputs the size and positivity or negativity of the phase difference of the two clock signals. The technical solution utilizes the stochastic characteristic of the STDC to double the number of the equivalent comparators in the STDC array, eliminating the effects on the circuitry of device mismatching and processes, power supply voltage, and temperature.
摘要翻译： 包括输入切换电路，STDC阵列和编码器的随机时间数字转换器（STDC）。 时钟电路将两个时钟信号输入到输入开关电路的两个输入端; 输入切换电路以循环交叉形式将两个时钟信号发送到STDC阵列的两个输入端，同时向编码器输出触发控制信号; STDC阵列中的每个比较器独立地判断两个时钟信号的速度，并将判断结果发送到编码器进行采集和处理; 并且编码器输出两个时钟信号的相位差的大小和积极性或消极性。 该技术解决方案利用STDC的随机特性将STDC阵列中的等效比较器的数量加倍，从而消除了器件不匹配和处理电路，电源电压和温度的影响。
-
公开(公告)号：US08810440B2
公开(公告)日：2014-08-19
申请号：US13983297
申请日：2012-05-29
申请人： Jianhui Wu , Zixuan Wang , Xiao Shi , Meng Zhang , Cheng Huang , Chao Chen , Fuqing Huang , Xincun Ji , Ping Jiang
发明人： Jianhui Wu , Zixuan Wang , Xiao Shi , Meng Zhang , Cheng Huang , Chao Chen , Fuqing Huang , Xincun Ji , Ping Jiang
CPC分类号： H03M1/04 , G04F10/005
摘要： A stochastic time-digital converter (STDC) including an input switching circuit, an STDC array, and an encoder. A clock circuit inputs two clock signals into two input terminals of the input switching circuit; the input switching circuit transmits the two clock signals in a cyclic cross-transposition form to two input terminals of the STDC array, and simultaneously outputs a trigger control signal to the encoder; each comparator in the STDC array independently judges the speeds of the two clock signals and sends the judgement results to the encoder for collection and processing; and the encoder outputs the size and positivity or negativity of the phase difference of the two clock signals. The technical solution utilizes the stochastic characteristic of the STDC to double the number of the equivalent comparators in the STDC array, eliminating the effects on the circuitry of device mismatching and processes, power supply voltage, and temperature.
摘要翻译： 包括输入切换电路，STDC阵列和编码器的随机时间数字转换器（STDC）。 时钟电路将两个时钟信号输入到输入开关电路的两个输入端; 输入切换电路以循环交叉形式将两个时钟信号发送到STDC阵列的两个输入端，同时向编码器输出触发控制信号; STDC阵列中的每个比较器独立地判断两个时钟信号的速度，并将判断结果发送到编码器进行采集和处理; 并且编码器输出两个时钟信号的相位差的大小和积极性或消极性。 该技术解决方案利用STDC的随机特性将STDC阵列中的等效比较器的数量加倍，从而消除了器件不匹配和处理电路，电源电压和温度的影响。
-
公开(公告)号：US20130300490A1
公开(公告)日：2013-11-14
申请号：US13978864
申请日：2011-08-18
申请人： Jianhui Wu , Chao Chen , Hong Li , Longxing Shi , Zixuan Wang , Jie Sun , Zhiyi Ye , Meng Zhang
发明人： Jianhui Wu , Chao Chen , Hong Li , Longxing Shi , Zixuan Wang , Jie Sun , Zhiyi Ye , Meng Zhang
IPC分类号： H03D7/14
CPC分类号： H03D7/1425
摘要： A return-type current-reuse mixer having a transconductance/amplification stage, a mixing stage, and a high-pass and a low-pass filter network. The transconductance/amplification stage has a current-reuse CMOS topology wherein an input frequency signal is converted into a frequency current, low-frequency components are removed from the frequency current by the high-pass filter network, the frequency current is fed into the mixing stage, modulation occurs in the mixing stage, and then an intermediate-frequency signal is generated and output. Once high-frequency components are removed from the intermediate-frequency signal by the low-pass filter network, the intermediate-frequency signal is sent again for input into the transconductance/amplification stage, then amplified in the transconductance/amplification stage and output. The mixer transconductance/amplification stage employs a current-reuse technique. The input frequency and the output intermediate-frequency signal share a common transconductance/amplification stage. The mixer reduces power consumption, simplifies the circuit topology, and provides high conversion gain.
摘要翻译： 具有跨导/放大级，混频级以及高通和低通滤波器网络的返回型电流再利用混频器。 跨导/放大级具有电流再利用CMOS拓扑，其中输入频率信号被转换成频率电流，低频分量由高通滤波器网络从频率电流中去除，频率电流被馈送到混频 在混合阶段发生调制，然后产生并输出中频信号。 一旦通过低通滤波器网络从中频信号中去除了高频分量，则再次发送中频信号以输入到跨导/放大级，然后在跨导/放大级中放大并输出。 混频器跨导/放大级采用电流复用技术。 输入频率和输出中频信号共用一个跨导/放大级。 混频器降低了功耗，简化了电路拓扑结构，并提供了高转换增益。
-
公开(公告)号：US08766698B2
公开(公告)日：2014-07-01
申请号：US13978864
申请日：2011-08-18
申请人： Jianhui Wu , Chao Chen , Hong Li , Longxing Shi , Zixuan Wang , Jie Sun , Zhiyi Ye , Meng Zhang
发明人： Jianhui Wu , Chao Chen , Hong Li , Longxing Shi , Zixuan Wang , Jie Sun , Zhiyi Ye , Meng Zhang
CPC分类号： H03D7/1425
摘要： A return-type current-reuse mixer having a transconductance/amplification stage, a mixing stage, and a high-pass and a low-pass filter network. The transconductance/amplification stage has a current-reuse CMOS topology wherein an input frequency signal is converted into a frequency current, low-frequency components are removed from the frequency current by the high-pass filter network, the frequency current is fed into the mixing stage, modulation occurs in the mixing stage, and then an intermediate-frequency signal is generated and output. Once high-frequency components are removed from the intermediate-frequency signal by the low-pass filter network, the intermediate-frequency signal is sent again for input into the transconductance/amplification stage, then amplified in the transconductance/amplification stage and output. The mixer transconductance/amplification stage employs a current-reuse technique. The input frequency and the output intermediate-frequency signal share a common transconductance/amplification stage. The mixer reduces power consumption, simplifies the circuit topology, and provides high conversion gain.
摘要翻译： 具有跨导/放大级，混频级以及高通和低通滤波器网络的返回型电流再利用混频器。 跨导/放大级具有电流再利用CMOS拓扑，其中输入频率信号被转换成频率电流，低频分量由高通滤波器网络从频率电流中去除，频率电流被馈送到混频 在混合阶段发生调制，然后产生并输出中频信号。 一旦通过低通滤波器网络从中频信号中去除了高频分量，则再次发送中频信号以输入到跨导/放大级，然后在跨导/放大级中放大并输出。 混频器跨导/放大级采用电流复用技术。 输入频率和输出中频信号共用一个跨导/放大级。 混频器降低了功耗，简化了电路拓扑结构，并提供了高转换增益。
-
公开(公告)号：US20210328564A1
公开(公告)日：2021-10-21
申请号：US17232088
申请日：2021-04-15
申请人： Chao Chen , Youn-Jae Kook , Jihee Lee , Kailiang Chen , Leung Kin Chiu , Joseph Lutsky , Nevada J. Sanchez , Sebastian Schaetz , Hamid Soleimani
发明人： Chao Chen , Youn-Jae Kook , Jihee Lee , Kailiang Chen , Leung Kin Chiu , Joseph Lutsky , Nevada J. Sanchez , Sebastian Schaetz , Hamid Soleimani
摘要： Aspects of the technology described herein relate to built-in self-testing (BIST) of circuitry (e.g., a pulser or receive circuitry) and/or transducers in an ultrasound device. A BIST circuit may include a transconductance amplifier coupled between a pulser and receive circuitry, a capacitor network coupled between a pulser and receive circuitry, and/or a current source couplable to the input terminal of receive circuitry to which a transducer is also couplable. The collapse voltages of transducers may be characterized using BIST circuitry, and a bias voltage may be applied to the membranes of the transducers based at least in part on their collapse voltages. The capacitances of transducers may also be measured using BIST circuitry and a notification may be generated based on the sets of measurements.
-
公开(公告)号：US20210325349A1
公开(公告)日：2021-10-21
申请号：US17232100
申请日：2021-04-15
申请人： Chao Chen , Youn-Jae Kook , Jihee Lee , Kailiang Chen , Leung Kin Chiu , Joseph Lutsky , Nevada J. Sanchez , Sebastian Schaetz , Hamid Soleimani
发明人： Chao Chen , Youn-Jae Kook , Jihee Lee , Kailiang Chen , Leung Kin Chiu , Joseph Lutsky , Nevada J. Sanchez , Sebastian Schaetz , Hamid Soleimani
摘要： Aspects of the technology described herein relate to built-in self-testing (BIST) of circuitry (e.g., a pulser or receive circuitry) and/or transducers in an ultrasound device. A BIST circuit may include a transconductance amplifier coupled between a pulser and receive circuitry, a capacitor network coupled between a pulser and receive circuitry, and/or a current source couplable to the input terminal of receive circuitry to which a transducer is also couplable. The collapse voltages of transducers may be characterized using BIST circuitry, and a bias voltage may be applied to the membranes of the transducers based at least in part on their collapse voltages. The capacitances of transducers may also be measured using BIST circuitry and a notification may be generated based on the sets of measurements.
-
公开(公告)号：US10074010B2
公开(公告)日：2018-09-11
申请号：US15211924
申请日：2016-07-15
CPC分类号： G06K9/00335 , G06K9/00375 , G06K9/48
摘要： An image processing method in accordance with this disclosure includes steps of obtaining an object image including an operating body, extracting the operating body from the object image, and calculating an orientation of the operating body in the object image. The method further includes determining whether the operating body is of an operator that operates an apparatus based on the orientation of the operation body.
-
公开(公告)号：US09082566B2
公开(公告)日：2015-07-14
申请号：US12874269
申请日：2010-09-02
申请人： Chao Chen
发明人： Chao Chen
CPC分类号： H01H13/83 , H01H2219/044 , H01H2219/056 , H01H2219/06 , H01H2219/062 , H01H2219/064
摘要： A backlighting assembly for use in a keypad assembly. The backlighting assembly includes at least one light emitting source configured to emit light; and a light guide assembly configured to receive the emitted light and direct the light toward the at least one key. The light guide assembly includes both a light guide film and a light guide frame for directing light from the light source toward the key(s).
摘要翻译： 用于键盘组件的背光组件。 背光组件包括配置成发光的至少一个发光源; 以及导光组件，其被配置为接收所发射的光并将光引向所述至少一个键。 光导组件包括导光膜和用于将光从光源引向键的导光框架。
-
-
-
-
-
-
-
-
-
搜索结果
243 条记录 (耗时 0.035 秒)