The design and fabrication results of a 4-port digital isolator based on an on-chip transformer for galvanic isolation are presented. An ON–OFF keying modulation scheme is used to transmit the digital signal. The pro...The design and fabrication results of a 4-port digital isolator based on an on-chip transformer for galvanic isolation are presented. An ON–OFF keying modulation scheme is used to transmit the digital signal. The proposed digital isolator is fabricated by the 0.18 μm CMOS process. A test chip can achieve a 1 MHz signal bandwidth, a 40 ns propagation delay, a 35.5 mW input power and a 50 mA drive output current. The proposed digital isolator is pin-compatible, of small volume and low power replacement for the common 4-port optocoupler.展开更多
三线同步串口传输方式具有简单可靠、实现容易、占用线缆少等优点,为了适应线阵CCD双端输出的高速成像模式需求,本文引入了DDR(Double Data Rate,双数据速率)读写方式,对三线同步串口进行改造,探讨如何在较低时钟频率下达到较高的传输带...三线同步串口传输方式具有简单可靠、实现容易、占用线缆少等优点,为了适应线阵CCD双端输出的高速成像模式需求,本文引入了DDR(Double Data Rate,双数据速率)读写方式,对三线同步串口进行改造,探讨如何在较低时钟频率下达到较高的传输带宽,提出了基于DDR的四线同步串口设计,当同步帧使能信号有效时,同时传输两组具有固定时延的数据,在接收端设计合适的缓存协议,实现了图像高速串行传输。该设计的程序编码比较简单,不过多增加传输线缆的负担,易于软硬件实现和工程应用。展开更多
文摘The design and fabrication results of a 4-port digital isolator based on an on-chip transformer for galvanic isolation are presented. An ON–OFF keying modulation scheme is used to transmit the digital signal. The proposed digital isolator is fabricated by the 0.18 μm CMOS process. A test chip can achieve a 1 MHz signal bandwidth, a 40 ns propagation delay, a 35.5 mW input power and a 50 mA drive output current. The proposed digital isolator is pin-compatible, of small volume and low power replacement for the common 4-port optocoupler.
文摘三线同步串口传输方式具有简单可靠、实现容易、占用线缆少等优点,为了适应线阵CCD双端输出的高速成像模式需求,本文引入了DDR(Double Data Rate,双数据速率)读写方式,对三线同步串口进行改造,探讨如何在较低时钟频率下达到较高的传输带宽,提出了基于DDR的四线同步串口设计,当同步帧使能信号有效时,同时传输两组具有固定时延的数据,在接收端设计合适的缓存协议,实现了图像高速串行传输。该设计的程序编码比较简单,不过多增加传输线缆的负担,易于软硬件实现和工程应用。
