Improved PWM A/D conversion technique: working principle and model validation

• Author(s): Pereira, José Miguel Costa Dias
• Date: 2020
• Persistent ID: http://hdl.handle.net/10400.26/34582
• Origin: Instituto Politécnico de Setúbal
• Document Type: Book part
• Language: English
• Contributor(s): Repositório Comum

Description

Analog-to-digital conversion plays a central role in any application of digital sensors and sensor systems that require an interface between analog devices, namely analog sensors, and digital devices, namely, microprocessors, digital signal processors or microcontrollers. With the advent of smart sensing, the integration of signal conditioning, analog-to-digital and digital data processing in single hardware devices became a reality. Moreover, the usage of low-cost discrete A/D conversion techniques for applications that are not critic in terms of accuracy, resolution or conversion rate, are considering increasingly mixed hardware and software A/D solutions tailored for specific application demands. In this context, this chapter presents a discrete low-cost A/D conversion solution based on pulse width modulation particularly suited for microcontrollers' integration with smart sensing devices.