公开(公告)号：US20160358617A1

公开(公告)日：2016-12-08

申请号：US15243154

申请日：2016-08-22

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO ,  Peter John FRITH ,  John Laurence PENNOCK

IPC: G10L19/16 ,  H04L25/49 ,  G10L19/002

CPC classification number: G10L19/167 ,  G10L19/002 ,  H04L25/49 ,  H04L25/4902 ,  H04L25/4904

Abstract: This application relates to methods and apparatus for transfer of multiple digital data streams, especially of digital audio data over a single communications link such as a single wire. The application describes audio interface circuitry comprising a pulse-length-modulation (PLM) modulator (204). The PLM is responsive to a plurality of data streams (PDM-R, PDM-L), to generate a series of data pulses (PLM) with a single data pulse having a rising and falling edge in each of a plurality of transfer periods defined by a first clock signal (TCLK). The timing of the rising and falling edge of each data pulse is dependent upon on a combination of the then current data samples from the plurality of data streams. The duration and position of the data pulse in the transfer window in effect defines a data symbol encoding the data. Circuitry for receiving and extracting the data is also disclosed. An interface receives the stream of data pulses (PLM) and data extraction circuitry (202) samples the data pulse to determine which of the possible data symbols the pulse represents and determines a data value for at least one received data stream.

Abstract translation: 本申请涉及用于通过单个通信链路（例如单线）传送多个数字数据流，特别是数字音频数据的方法和装置。 该应用描述了包括脉冲长度调制（PLM）调制器（204）的音频接口电路。 PLM响应于多个数据流（PDM-R，PDM-L），以产生一系列数据脉冲（PLM），其中单个数据脉冲具有在多个传输周期中的每一个中定义的上升沿和下降沿 通过第一时钟信号（TCLK）。 每个数据脉冲的上升沿和下降沿的定时取决于来自多个数据流的当前数据样本的组合。 传输窗口中的数据脉冲的持续时间和位置有效地定义了对数据进行编码的数据符号。 还公开了用于接收和提取数据的电路。 接口接收数据脉冲流（PLM），并且数据提取电路（202）对数据脉冲采样以确定脉冲表示哪些可能数据符号，并确定至少一个接收到的数据流的数据值。

公开(公告)号：US20200219522A1

公开(公告)日：2020-07-09

申请号：US16803703

申请日：2020-02-27

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO ,  Peter John FRITH ,  John Laurence PENNOCK

IPC: G10L19/16 ,  H04L25/49 ,  G10L19/002

Abstract: This application relates to methods and apparatus for transfer of multiple digital data streams, especially of digital audio data over a single communications link such as a single wire. The application describes audio interface circuitry comprising a pulse-length-modulation (PLM) modulator (204). The PLM is responsive to a plurality of data streams (PDM-R, PDM-L), to generate a series of data pulses (PLM) with a single data pulse having a rising and falling edge in each of a plurality of transfer periods defined by a first clock signal (TCLK). The timing of the rising and falling edge of each data pulse is dependent upon on a combination of the then current data samples from the plurality of data streams. The duration and position of the data pulse in the transfer window in effect defines a data symbol encoding the data. Circuitry for receiving and extracting the data is also disclosed. An interface receives the stream of data pulses (PLM) and data extraction circuitry (202) samples the data pulse to determine which of the possible data symbols the pulse represents and determines a data value for at least one received data stream.

公开(公告)号：US20220383882A1

公开(公告)日：2022-12-01

申请号：US17845703

申请日：2022-06-21

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul LESSO ,  Peter John FRITH ,  John Laurence PENNOCK

IPC: G10L19/008

Abstract: This application relates to methods and apparatus for transfer of multiple digital data streams, especially of digital audio data over a single communications link such as a single wire. The application describes audio interface circuitry comprising a pulse-length-modulation (PLM) modulator. The PLM is responsive to a plurality of data streams (PDM-R, PDM-L), to generate a series of data pulses (PLM) with a single data pulse having a rising and falling edge in each of a plurality of transfer periods defined by a first clock signal (TCLK). The timing of the rising and falling edge of each data pulse is dependent upon a combination of the then current data samples from the plurality of data streams. The duration and position of the data pulse in the transfer window in effect defines a data symbol encoding the data. Circuitry for receiving and extracting the data is also disclosed. An interface receives the stream of data pulses (PLM) and data extraction circuitry samples the data pulse to determine which of the possible data symbols the pulse represents and determines a data value for at least one received data stream.