are also widely used in prototyping and development. Mixed-signal circuits Mixed-signal or hybrid circuits contain elements of both analog and digital circuits. Examples include comparators, timers, phase-locked loops, analog-to-digital converters, and digital-to-analog converters. Most modern radio and communications circuitry uses mixed signal circuits. For example, in a receiver, analog circuitry is used to amplify and frequency-convert signals so that they reach a suitable state to be converted into digital values, after which further signal processing can be performed in the digital domain. Design Prototyping References External links Electronics Circuits Textbook Electronics Fundamentals Electronic engineering Electricity es:Circuito electrónico hu:Áramkör