Discover Circuits includes circuit schematics, descriptions and some have parts lists.   Included are circuits designed
by David A. Johnson and  links to other circuits. Discover Circuits has more than 4500 carefully categorized electronic 
circuit schematics. New circuits and/or links are added regularly. 
OPERATIONAL AMPLIFIERS
The operational amplifier is arguably 
the most useful single device in analog electronic circuitry. With only a handful 
of external components, it can be made
to perform a wide variety of analog 
signal processing tasks. ................
Operational Amplifiers
The term operational amplifier or "op-amp" refers to a class of high-gain DC coupled amplifiers with two inputs and a single output. The modern integrated circuit version is typified 
by the famous 741 op-amp. Some of 
the general characteristics of the IC version are...................
Teoría de la fibra óptica
TUTORIAL DE ELECTRÓNICA DE POTENCIA
En este tutorial encontrará los circuitos más representativos de la asignatura Electrónica 
de Potencia II correspondiente a la carrera de Ingeniería Técnica Industrial, especialidad Electrónica, impartida en la Universidad 
Politécnica de Cartagena.
Realización de Filtros Digitales
Electrónica, Automática e Informática Industrial (Universidad Politécnica de Madrid) Welcome to Ake's Tubedata - This site is dedicated to Electron Tubes of all kinds.
Although tubes are considered being an obsolete device this site is under continuous development.
COLLECTION OF CATHODE RAY AND PHOTO TUBES Filtros Activos
National Semiconductors Sallen - Key Filters
Active Filters Motores paso a paso
Tiristores Seminario interactivo de electrónica de potencia (iPES). Rectificador controlado de tiristores, con carga resistiva e inductiva
Rectificadores Controlados SIMBOLOGIA GENERAL
Circuitos Electrónicos - Ing. Adrián Darío Rosa< Sitio Web de Electrónica Unicrom
Power Inverters Tunnel Diode
Bienvenido a eya.swin.net, la web dedicada a proporcionar información al ingeniero/técnico electrónico.  Infineon Technologies AG - Silicon Power Diodes
INDUSTRIAL ELECTRICAL AND MAINTENANCE  Variadores de velocidad y arrancadores electrónicos