https://books.google.com.pe/books?id=Ewaumr4SaG8C&pg=PA274&lpg=PA274&dq=17.1+diagramas+de+bloques+de+un+amplificador+de+audio&source=bl&ots=FXyls6XMe6&sig=JRM4HE9NcrVz92FIqKhip3wYmec&hl=es-419&sa=X&ved=0CBoQ6AEwAGoVChMIzdqP5bTcyAIVyUomCh2LfgTK#v=onepage&q=17.1%20diagramas%20de%20bloques%20de%20un%20amplificador%20de%20audio&f=false

https://apuntesdeelectronica.wordpress.com/electronica-analogica/

http://tonayitofriend.tripod.com/practica2_archivos/practica3.html

http://cvb.ehu.es/open_course_ware/castellano/tecnicas/electro_gen/teoria/tema-5-teoria.pdf

http://www.backyardbrains.cl/experiments/transistorDesign

http://www.monografias.com/trabajos89/conceptos-electronica-teoria-circuitos/conceptos-electronica-teoria-circuitos2.shtml