公开(公告)号：US09178552B1

公开(公告)日：2015-11-03

申请号：US14547394

申请日：2014-11-19

Applicant: Xilinx, Inc.

Inventor： Patrick Satarzadeh ,  Hongtao Zhang ,  Geoffrey Zhang ,  Zhaoyin D. Wu

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159 ,  H04B1/16 ,  H04L25/03

CPC classification number: H04L25/03885 ,  H04B1/16 ,  H04L25/03057 ,  H04L2025/03547

Abstract: In a method for channel adaptation, an analog input signal is received with a bimodal receiver via a communications channel. The analog input signal is converted to a digital input signal with an analog-to-digital converter of a digital receiver of the bimodal receiver. Channel coefficients are detected for the digital input signal associated with the communications channel. The channel coefficients indicate a number of post-cursor taps of the bimodal receiver to be used to provide an equalized digital output signal from the digital input signal. It is determined whether the number of post-cursor taps or a value associated therewith is equal to or less than a threshold number. A switch from the receiving of the analog input signal by the digital receiver to an analog receiver of the bimodal receiver is made to provide the equalized digital output signal for the analog input signal.

Abstract translation: 在一种用于信道适配的方法中，通过通信信道用双模接收机接收模拟输入信号。 模拟输入信号通过双模接收器的数字接收器的模数转换器转换为数字输入信号。 检测与通信信道相关联的数字输入信号的信道系数。 信道系数指示用于从数字输入信号提供均衡的数字输出信号的双模接收机的多个后置光标抽头。 确定后视标抽头的数量或与其相关联的值是否等于或小于阈值数。 使得从数字接收机将模拟输入信号接收到双模接收机的模拟接收机的切换是为模拟输入信号提供均衡的数字输出信号。

公开(公告)号：US09882795B1

公开(公告)日：2018-01-30

申请号：US14689327

申请日：2015-04-17

Applicant: Xilinx, Inc.

Inventor： Hongtao Zhang ,  Geoffrey Zhang ,  Yu Xu ,  Patrick Satarzadeh ,  Zhaoyin D. Wu

IPC: H04L12/26 ,  H04L25/03 ,  H04L7/00

CPC classification number: H04L43/0811 ,  H04L7/0087 ,  H04L25/03057

Abstract: In an example, an apparatus for detecting signal loss on a serial communication channel coupled to a receiver includes an input, a detector, and an output circuit. The input is configured to receive decisions generated by sampling the serial communication channel using multiplexed decision paths in a decision feedback equalizer (DFE). The detector is coupled to the input and configured to monitor the decisions for at least one pattern generated by the multiplexed decision paths in response to absence of a serial data signal on the serial communication channel. The output circuit is coupled to the detector and configured to assert loss-of-signal in response detection of the at least one pattern by the detector.

公开(公告)号：US09237047B1

公开(公告)日：2016-01-12

申请号：US14689294

申请日：2015-04-17

Applicant: Xilinx, Inc.

Inventor： Hongtao Zhang ,  Geoffrey Zhang ,  Patrick Satarzadeh ,  Zhaoyin D. Wu

IPC: H04L27/06 ,  H04B1/12

CPC classification number: H04L27/06 ,  H04L25/061

Abstract: A circuit for receiving data in an integrated circuit is described. The circuit comprises a receiver configured to receive an input signal and to generate output data based upon the input signal, the receiver having a level detection circuit coupled to receive the input signal; and a calibration circuit coupled to the receiver, the calibration circuit having an input for receiving the input signal; an error detection circuit coupled to the input, the error detection circuit coupled to receive the input signal, a first reference voltage and a second reference voltage; and a control circuit coupled to an output of the error detection circuit, wherein the control circuit selectively generates either an offset control signal or an amplitude control signal based upon comparisons of the input signal to the first reference voltage and the second reference voltage. A method of receiving data is also disclosed.

Abstract translation: 描述了用于在集成电路中接收数据的电路。 该电路包括接收器，配置为接收输入信号并基于输入信号产生输出数据，接收器具有耦合以接收输入信号的电平检测电路; 以及校准电路，其耦合到所述接收器，所述校准电路具有用于接收所述输入信号的输入; 耦合到所述输入端的误差检测电路，所述误差检测电路被耦合以接收所述输入信号，第一参考电压和第二参考电压; 以及耦合到所述误差检测电路的输出的控制电路，其中所述控制电路基于所述输入信号与所述第一参考电压和所述第二参考电压的比较来选择性地产生偏移控制信号或幅度控制信号。 还公开了接收数据的方法。