DESCRIPTION The DG449 is a dual supply single-pole/double-throw (SPDT) switches. On resistance is 38  and flatness is 2.6  max over the specified analog signal range. These analog switches were designed to provide high speed, low error switching of…

Voltage Translation for Analog to Digital Interface 孕龙逻辑分析仪 ZeroPlus Logic Analyzer How to modify analog output range of Arduino Due In today's microcontroller market, most of the Analog to Digital converters are only able to accept voltages from the…

http://www.freelabs.com/~whitis/electronics/jtag/ One of the big issues in making a JTAG pod is level translation. The state of level translation ICs leaves a LOT to be desired. You would think that there would be a lot of chips that you could apply…

how to generate an analog output from a in-built pwm of Atmega 32AVR microcontrloller? you need a resistor, a capacitor and an opamp. opamp is not really necessary when you are driving a mosfet, but will make life a bit easier. just be aware, that th…

Voltage Translation for Analog to Digital Interface ADC How to modify analog output range of Arduino Due Arduino Due does not have an analog output voltage from 0 V to Vref, but from 1/6 to 5/6 of the reference voltage, that is, 0.55 V and 2.75V with…

Symbol: switch A,B:等效于一个电阻; C,D:等效于控制开关(CD间的控制电压控制AB的断开或闭合); open switch resistance:开关断开状态下的等效电阻(AB之间); close switch resistance:开关闭合状态下的等效电阻(AB之间); open voltage:断开开关所需的电压值(CD间电压低于该值,则AB间处于断开状态); closed voltage:闭合开关所需的电压值(CD间电压高于该值,则AB间处于闭合状态); 有W标记的是…

Sound card based RFID sniffer/emulator (Too tired after recon.cx to do draw the schematics better than that :) Stay tuned for the next version including Tag emulation.) baudline FFT signal analyzer for sniffing LF RFID tags using our sound card based…

RFID读写器的工作原理 RFID的数据采集以读写器为主导,RFID读写器是一种通过无线通信,实现对标签识别和内存数据的读出和写入操作的装置. 读写器又称为阅读器或读头(Reader).查询器(Interrogator).读出装置(Reading Device). 扫描器(Scanner).通信器(Communicator).编程/编码器(Programmer)等等. 读写器工作原理 RFID读写器的基本原理是利用射频信号与空间耦合传输特性,使电子标签与阅读器的耦合元件在射频耦合通道内进行能量传…

http://e2e.ti.com/blogs_/b/analogwire/archive/tags/DAC%2bEssentials DAC Essentials: A new blog series A digital-to-analog converter, or DAC, performs the opposite function of an analog-to-digital converter, or ADC. Duh, right? But, have you ever wond…

Transistor Tutorial Summary Transistor Tutorial Summary Bipolar Junction Transistor Tutorial We can summarise this transistors tutorial section as follows: The Bipolar Junction Transistor (BJT) is a three layer device constructed form two semiconduct…