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1. 发明授权

US08775856B1 System and method for generating clock signal for a plurality of communication ports by selectively dividing a reference clock signal with a plurality of ratios 有权
标题翻译：通过选择性地划分具有多个比率的参考时钟信号来产生多个通信端口的时钟信号的系统和方法
公开(公告)号：US08775856B1
公开(公告)日：2014-07-08
申请号：US12721447
申请日：2010-03-10
申请人： Hongming An , Jun Ye , Christopher Thomas , CongQing Xiong
发明人： Hongming An , Jun Ye , Christopher Thomas , CongQing Xiong
IPC分类号： G06F1/00 , G06F1/12
CPC分类号： G06F1/06
摘要： Various techniques are provided to generate a plurality of reference clock signals using a single reference clock signal generator. In one example, a clock signal generation system includes a reference clock signal generator adapted to provide a reference clock signal. The system also includes a plurality of dividers adapted to divide the reference clock signal using different ratios to provide a plurality of communication port clock signals. The system also includes a plurality of different communication ports adapted to receive the communication port clock signals and adapted to operate in accordance with different communication protocols using the communication port clock signals.
摘要翻译：提供各种技术以使用单个参考时钟信号发生器产生多个参考时钟信号。在一个示例中，时钟信号产生系统包括适于提供参考时钟信号的参考时钟信号发生器。该系统还包括多个分频器，其适于使用不同的比率划分参考时钟信号以提供多个通信端口时钟信号。该系统还包括多个不同的通信端口，其适于接收通信端口时钟信号并且适于根据使用通信端口时钟信号的不同通信协议进行操作。

2. 发明授权

US07990296B1 High speed low power cell providing serial differential signals 有权
标题翻译：高速低功率电池提供串行差分信号
公开(公告)号：US07990296B1
公开(公告)日：2011-08-02
申请号：US12721418
申请日：2010-03-10
申请人： Heng Wang , Hongming An , CongQing Xiong
发明人： Heng Wang , Hongming An , CongQing Xiong
IPC分类号： H03M9/00
CPC分类号： H03M9/00
摘要： Techniques are provided to serialize and delay parallel input data signals and are particularly useful for low power applications. In one example, a device includes a plurality of data input ports adapted to receive N parallel single-ended input data signals, and a clock input port adapted to receive a clock signal substantially synchronized with the parallel single-ended input data signals. The device also includes a cell adapted to serialize the parallel single-ended input data signals to provide N/2 first serial differential output data signals in response to the clock signal, delay the parallel single-ended input data signals, and serialize the delayed parallel single-ended input data signals to provide N/2 delayed second serial differential output data signals in response to the clock signal. The delayed second serial differential output data signals are delayed relative to the first serial differential output data signals. The device also includes a plurality of output ports.
摘要翻译：提供技术来串行化和延迟并行输入数据信号，并且对于低功率应用特别有用。在一个示例中，设备包括适于接收N个并行单端输入数据信号的多个数据输入端口和适于接收与并行单端输入数据信号基本同步的时钟信号的时钟输入端口。该器件还包括适用于串行化并行单端输入数据信号的单元，以响应于时钟信号提供N / 2个第一串行差分输出数据信号，延迟并行单端输入数据信号，并串行化延迟并联单端输入数据信号，以响应于时钟信号提供N / 2延迟的第二串行差分输出数据信号。延迟的第二串行差分输出数据信号相对于第一串行差分输出数据信号被延迟。该设备还包括多个输出端口。

3. 发明授权

US08391420B1 Low frequency communication signal state detection 有权
标题翻译：低频通信信号状态检测
公开(公告)号：US08391420B1
公开(公告)日：2013-03-05
申请号：US12721365
申请日：2010-03-10
申请人： Hongming An , Wei Fu , CongQing Xiong , James Ho
发明人： Hongming An , Wei Fu , CongQing Xiong , James Ho
IPC分类号： H04L27/00 , H04L27/10 , H02P11/00
CPC分类号： H04L25/0272 , H04L25/0292
摘要： Various techniques are provided to detect a state of a communication signal. In one example, a method of detecting a state of a signal includes receiving a differential communication signal comprising a positive portion and a complementary negative portion. The method also includes filtering the positive portion of the communication signal through a first low pass filter to provide a filtered positive portion of the communication signal. The method also includes filtering the negative portion of the communication signal through a second low pass filter to provide a filtered negative portion of the communication signal. The method also includes comparing the filtered positive portion of the communication signal with an internal reference voltage. The method also includes comparing the filtered negative portion of the communication signal with the internal reference voltage. The method also includes generating a low frequency detect signal in response to the comparing operations to indicate whether the communication signal is in a low frequency state.
摘要翻译：提供各种技术来检测通信信号的状态。在一个示例中，检测信号状态的方法包括接收包括正部分和互补负部分的差分通信信号。该方法还包括通过第一低通滤波器对通信信号的正部分进行滤波，以提供经过滤波的通信信号的正部分。该方法还包括通过第二低通滤波器对通信信号的负部分进行滤波，以提供经过滤波的通信信号的负部分。该方法还包括将通信信号的经滤波的正部分与内参考电压进行比较。该方法还包括将通信信号的滤波后的负部分与内部基准电压进行比较。该方法还包括响应于比较操作产生低频检测信号，以指示通信信号是否处于低频状态。

4. 发明授权

US08432981B1 High frequency and idle communication signal state detection 有权
标题翻译：高频和空闲通信信号状态检测
公开(公告)号：US08432981B1
公开(公告)日：2013-04-30
申请号：US12721333
申请日：2010-03-10
申请人： Hongming An , Wei Fu , CongQing Xiong , James Ho
发明人： Hongming An , Wei Fu , CongQing Xiong , James Ho
IPC分类号： H04K1/10 , H04M1/64 , H04M1/00
CPC分类号： H04K3/22 , H04K3/45 , H04K3/822
摘要： Various techniques are provided to detect a state of a communication signal. In one example, a method of detecting a state of a signal includes receiving a differential communication signal comprising a positive portion and a complementary negative portion. The method also includes generating a common mode voltage signal from the positive portion and the negative portion of the communication signal. The method also includes rectifying the positive portion and the negative portion of the communication signal to provide a rectified signal. The method also includes comparing the common mode voltage, signal with the rectified signal. The method also includes generating a high frequency detect signal in response to the comparing. The method also includes determining whether the communication signal is in an idle state or a high frequency state based on the high frequency detect signal.
摘要翻译：提供各种技术来检测通信信号的状态。在一个示例中，检测信号状态的方法包括接收包括正部分和互补负部分的差分通信信号。该方法还包括从通信信号的正部分和负部分产生共模电压信号。该方法还包括校正通信信号的正部分和负部分以提供整流信号。该方法还包括将共模电压，信号与整流信号进行比较。该方法还包括响应于比较产生高频检测信号。该方法还包括基于高频检测信号确定通信信号是处于空闲状态还是高频状态。

5. 发明授权

US08489781B1 Detection system and methods 有权
标题翻译：检测系统和方法
公开(公告)号：US08489781B1
公开(公告)日：2013-07-16
申请号：US12721268
申请日：2010-03-10
申请人： Hongming An , CongQing Xiong , Heng Wang
发明人： Hongming An , CongQing Xiong , Heng Wang
IPC分类号： G06F3/00 , H02J7/00
CPC分类号： G06F13/4295 , H02J7/0036 , H02J2007/0062
摘要： Various techniques are provided to facilitate a detection system to detect a presence of an externally coupled receiver device, such as a universal serial bus (USB) device. In one example, the system generates a reference current and passes the reference current via a conductor to a shared buffer circuit. The shared buffer circuit is adapted to selectively pass the reference current or a communication signal to the externally coupled receiver device. The system switches between a detect mode where the reference current is provided to the externally coupled receiver device and between a communicate mode where the reference current is blocked and the communication signal is provided to the externally coupled receiver device. The system monitors a voltage value of the conductor and the system monitors a time for the voltage value to reach a pre-determined threshold value in response to the reference current. The system detects a presence of the externally coupled receiver device based on the monitored time.
摘要翻译：提供各种技术以便于检测系统检测诸如通用串行总线（USB）设备之类的外部耦合的接收机设备的存在。在一个示例中，系统产生参考电流并且经由导体将参考电流传递到共享缓冲器电路。共享缓冲电路适于选择性地将参考电流或通信信号传递到外部耦合的接收机设备。系统在提供参考电流的检测模式与外部耦合的接收机设备之间以及在参考电流被阻挡的通信模式与通信信号提供给外部耦合的接收机设备之间切换。该系统监视导体的电压值，并且系统监视响应于参考电流的电压值达到预定阈值的时间。该系统基于所监视的时间来检测外部耦合的接收机设备的存在。

6. 发明授权

US06492845B1 Low voltage current sense amplifier circuit 有权
标题翻译：低电压电流检测放大电路
公开(公告)号：US06492845B1
公开(公告)日：2002-12-10
申请号：US10034393
申请日：2001-12-27
申请人： Weiguo Ge , Congqing Xiong
发明人： Weiguo Ge , Congqing Xiong
IPC分类号： G06G712
CPC分类号： H03F1/22 , H03F1/223
摘要： A current sense amplifier including a transconductance amplifier to measure a current passing through a sense resistor and generate a reference current indicative of the measured current. A current mirror circuit is connected to the transconductance amplifier and receives the reference current for amplification to generate an amplified output current. A cascode circuit is connected serially to the current mirror circuit to boost an output impedance for the amplifier at the output of the generated amplified output current. The current mirror circuit and cascode circuit of the current sense amplifier are each formed from a pair of transistors sharing a common control node, with the transistors realized using with bipolar or MOS technology.
摘要翻译：一种包括跨导放大器的电流检测放大器，用于测量通过检测电阻器的电流并产生指示测量电流的参考电流。电流镜电路连接到跨导放大器，并接收用于放大的参考电流以产生放大的输出电流。共源共栅电路串联连接到电流镜电路，以在产生的放大输出电流的输出端提升放大器的输出阻抗。电流检测放大器的电流镜电路和共源共栅电路各自由共享公共控制节点的一对晶体管形成，晶体管采用双极或MOS技术实现。

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