http://www.design-reuse.com/articles/14886/fully-digital-implemented-delta-sigma-analog-to-digital-converter.html by Dr. Michael  Gude & Gerriet MuellerCologne Chip AG, Koeln (Cologne), Germany Abstract One of the most challenging tasks in Analog to…

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://electronicdesign.com/digital-ics/digital-current-mode-control-challenges-analog-counterparts Digital Current-Mode Control Challenges Analog Counterparts Electronic Design Bryan Kris Thu, 2006-11-16 (All day) Switch-mode power supplies can use…

118. Digital Root time limit per test: 0.25 sec. memory limit per test: 4096 KB Let f(n) be a sum of digits for positive integer n. If f(n) is one-digit number then it is a digital root for n and otherwise digital root of n is equal to digital root o…

http://pdfserv.maximintegrated.com/en/an/AN818.pdf http://www.maximintegrated.com/app-notes/index.mvp/id/818 Digital Adjustment of DC-DC Converter Output Voltage in Portable Applications Abstract: This tutorial discusses methods for digitally adjusti…

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…

Low-cost, 8-bit, single-chip microcontrollers are stingy when it comes to on-chip PWM (pulse-width-modulation) resources. The use of a PWM resource often forces a designer to sacrifice a capture/compare or timer channel because the PWM channel shares…

1.水平梯度误差产生 sigma坐标系下,笛卡尔坐标内水平梯度项对应形式为 \[\begin{equation} \left. \frac{\partial }{\partial x} \right|_z = \left. \frac{\partial }{\partial x} \right|_{\sigma} + \frac{\partial }{\partial \sigma} \frac{\partial \sigma}{\partial x} \end{equation}\] 当采用数…

sigma 坐标变换 一般 \(\sigma\) 坐标转换方程为 \[\sigma = \frac{z-\eta}{D} = \frac{z-\eta}{H+\eta} \] 转换后水深 z 范围由原始的 \([-H, \eta]\) 变为 \(\sigma \in [-1,0]\),将这组坐标转换定义为 X = G(x),即 \[G(x,y,z) = (x^*, y^*, \sigma^*) \] \(\sigma\) 坐标转换后碰到最主要问题就是,在原始 z 坐标方程中各个微分项如何变化?…