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 ...

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 ...

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 ...

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 ...

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 ...