电子工程专辑

PWM实现ADC采集电量原理

对于没有ADC的主控芯片来说，如果要实现ADC的功能，可以用两个GPIO和一个运算放大器解决该问题。对于某些国产芯片来说，其内部没有ADC，所以在有些方案上采用的是PWM电路进行模拟电压的测量。接下来逐步分析一下基本的原理与采集过程。 利用积分电路 ...
电子工程专辑

Microchip升级数字信号控制器（DSC）产品线，推出PWM分辨率和ADC速度 ...

不断演变的安全与功能安全需求，加之实时嵌入式应用日益复杂，正推动设计人员寻求能够实现更高精度、更高可靠性并符合行业标准的创新解决方案。为应对这些挑战，Microchip Technology Inc.（微芯科技公司）在其dsPIC33A DSC 产品线中新增dsPIC33AK512MPS512和 ...
EDN电子技术设计

PWM + R2R DAC，这个组合用好了性能惊人！

将PWM与一个小型R-2R梯形DAC相结合，既可大大减小PWM纹波，又能增加DAC分辨率，从而提高两方面的性能。本设计实例利用一个8电阻阵列和3个输出引脚对R-2R梯形DAC进行修改重构，修改的目的是将底部2R连接到PWM输出而不是将其接地。 将PWM和小型R-2R梯形DAC相结合 ...
Electronic Design

ADC Function Based on PWM Technique (.PDF Download)

Pulse-width modulation (PWM) is used in applications ranging from controlling valves or pumps to adjusting the brightness of LEDs. In this proposed design, a PWM waveform is the basis for an analog-to ...
Electronic Design

ADC Function Based on PWM Technique

This file type includes high resolution graphics and schematics when applicable. Pulse-width modulation (PWM) is used in applications ranging from controlling valves or pumps to adjusting the ...
Electronics Weekly

Microchip works with element14 to unlock Flowcode

Online distributor and design community element14 has teamed up with Microchip and Matrix to introduce the PIC18 Flowcode developers kit. The demonstration kit is designed to offer an entry-level ...
EDN

Negative time-constant and PWM program a versatile ADC front end

A variety of analog front-end functions typically assist ADCs to do their jobs. These include instrumentation amplifiers (INA), digitally programmable gain (DPG), and sample and holds (S&H). The ...