产品型号:VK2C21A/B/C/D 产品品牌:VINKA/永嘉微/永嘉微电 封装形式:SOP28/24/20/16 裸片:DICE(邦定COB)/COG(邦定玻璃用) 产品年份:新年份 联 系 人:许硕 Q Q:191 888 5898 联系手机:18898582398(信) 原厂直销,工程服务,技术支持,价格最具优势!QT459 VK2C21A/B/C/D概述: VK2C21是一个点阵式存储映射的LCD驱动器,可支持最大80点(20SEGx4COM)或者最大128点(16SEGx8COM)的LCD屏。单片机可通过I2C接口配置显示参数和读写显示数据,也可通过指令进入省电模式。其高抗干扰,低功耗的特性适用于水电气表以及工控仪表类产品。 特点: ★ 工作电压 2.4-5.5V ★ 内置32 kHz RC振荡器 ★ 偏置电压(BIAS)可配置为1/3、1/4 ★ COM周期(DUTY)可配置为1/4、1/8 ★ 内置显示RAM为20x4位、16x8位 ★ 帧频可配置为80Hz、160Hz ★ 省电模式(通过关显示和关振荡器进入)
标签: VK2C21 VK2C21A VK2C21B VK2C21C VK2C21D LCD抗干扰段码屏驱动 段码屏驱动抗干扰
上传时间: 2022-06-09
上传用户:2937735731
描述了NTC使用B值计算出实际温度与输出的电压之间的关系。
标签: ntc计算
上传时间: 2022-06-15
上传用户:
BC20-TE-B NB-Iot 评估板评估板原厂原理图V1.2。完整对应实物装置。
上传时间: 2022-06-17
上传用户:
ASR M08-B设置软件 V3.2 arduino 2560+ASRM08-B测试程序 arduino UNO+ASRM08-B测试程序语音控制台灯电路图及C51源码(不带校验码) 继电器模块设置。 ASR M08-B是一款语音识别模块。首先对模块添加一些关键字,对着该模块说出关键字,串口会返回三位的数,如果是返回特定的三位数字,还会引起ASR M08-B的相关引脚电平的变化。【测试】①打开“ASR M08-B设置软件 V3.2.exe”。②选择“串口号”、“打开串口”、点选“十六进制显示”。③将USB转串口模块连接到语音识别模块上。接线方法如下:语音模块TXD --> USB模块RXD语音模块RXD --> USB模块TXD语音模块GND --> USB模块GND语音模块3V3 --> USB模块3V3(此端为3.3V电源供电端。)④将模块的开关拨到“A”端,最好再按一次上面的大按钮(按一次即可,为了确保模块工作在正确的模式)。⑤对着模块说“开灯”、“关灯”模块会返回“0B”、“0A”,表示正常(注意:0B对应返回值010,0B对应返回值010,返回是16进制显示的嘛,设置的时候是10进制设置的)。
标签: ASR M08-B
上传时间: 2022-07-06
上传用户:aben
IEEE Std 1180-1990. IEEE Standard Specifications for the Implementations of 8x8 Inverse Discrete Cosine Transform, specifies the numerical characteristics of the 8x8 inverse discrete cosine transform (IDCT) for use in visual telephony and similar applications where the 8x8 IDCT results are used in a reconstruction loop. The specifications ensure the compatibility between different implementations of the IDCT.
标签: IEEE Implementations Specifications Discrete
上传时间: 2016-01-31
上传用户:guanliya
用Fourier变换求取信号的功率谱---周期图法 用Fourier变换求取信号的功率谱---分段周期图法 用Fourier变换求取信号的功率谱---welch方法 功率谱估计----多窗口法(multitaper method ,MTM法) 功率谱估计----最大熵法(maxmum entmpy method,MEM法) 功率谱估计----多信号分类法(multiple signal classification,music法)Fourier transform to strike a signal to the power spectrum - the cycle of plans Fourier transform to strike a signal to the power spectrum - Sub-cycle Method Fourier transform to strike a signal to the power spectrum --- welch method Power spectrum estimated more than window ---- Law (multitaper method, MTM) ---- Power spectrum estimate of maximum entropy (maxmum entmpy method, MEM) ---- More than the estimated power spectrum signal classification (multiple signal classification, music)
上传时间: 2016-07-16
上传用户:wqxstar
A stability analysis is presented for staggered schemes for the governing equations of compressible flow. The method is based on Fourier analysis. The approximate nature of pressure-correction solution methods is taken into account. 2001 IMACS. Published by Elsevier Science B.V. All rights reserved
标签: compressible stability for equations
上传时间: 2016-12-02
上传用户:yph853211
为保证网络信息传输的安全性,提出一种视频图像加密方法。该方法引入混沌系统中的Logistic映射和 Baker映射,结合H·264视频压缩编码特点,利用Baker映射对DCT (Discrete Cosine Transform)变换量化后 的块进行位置置乱,
标签: Baker Logistic Discrete 映射
上传时间: 2017-02-06
上传用户:zhliu007
为保证网络信息传输的安全性,提出一种视频图像加密方法。该方法引入混沌系统中的Logistic映射和 Baker映射,结合H·264视频压缩编码特点,利用Baker映射对DCT (Discrete Cosine Transform)变换量化后 的块进行位置置乱,
标签: Baker Logistic Discrete 映射
上传时间: 2014-11-26
上传用户:mpquest
In this paper we revisit hybrid analog-digital precoding systems with emphasis on their modelling and radio-frequency (RF) losses, to realistically evaluate their benefits in 5G system implementations. For this, we decompose the analog beamforming networks (ABFN) as a bank of commonly used RF components and formulate realistic model constraints based on their S-parameters. Specifically, we concentrate on fully-connected ABFN (FC-ABFN) and Butler networks for implementing the discrete Fourier transform (DFT) in the RF domain. The results presented in this paper reveal that the performance and energy efficiency of hybrid precoding systems are severely affected, once practical factors are considered in the overall design. In this context, we also show that Butler RF networks are capable of providing better performances than FC-ABFN for systems with a large number of RF chains.
标签: Analog-Digital Precoding Hybrid
上传时间: 2020-05-27
上传用户:shancjb