Tham khảo tài liệu 'chapter 3: special diodes', kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Funda Integra JAMES COX 2iiđ edition OEl MAR ------ ------- TJ IOMSON It AHN R . CHAPTER 3 Special Diodes copyright 2002 Delmar Thomson Learning OBJECTIVES Describe and analyze the function and applications of surge protectors varactors switching diodes LEDs photodiodes trouble-shooting techniques for special diodes copyright 2002 Delmar Thomson Learning itd edition OFl IVIAR ---- -------- T1 lOM- .ON HAHN NG Funda Integra JAMES COX Zener Diodes A zener is a diode with a defined value of reverse breakdown voltage A zener is used in reverse breakdown mode The voltage across a zener is more or less independent of the current through it The function of a zener is to provide a voltage reference in a circuit copyright 2002 Delmar Thomson .