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Chap 3. Simple Diode I-V Representation. V ON = 0.7v. Ideal. R Leak. R ON =ohms. Diode Symbols and Ckt Representation. Diode SPICE parameters. Simple Diode Rectifer. R Leak. R on =RS =10 ohms. Limiters/Clippers. R Leak. 10V. -8V. Limiters/Clippers Con’t Zeners. V  +V Z. V Z.

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slide2

Simple Diode I-V Representation

VON = 0.7v

Ideal

RLeak

RON =ohms

simple diode rectifer
Simple Diode Rectifer

RLeak

Ron =RS =10 ohms

slide7

Limiters/Clippers Con’t

Zeners

V+VZ

VZ

-V-VZ

VZ

3.3V

-VZ

3.3V+VZ

Vo = RDiode Vin/(RDiode+R)

zener regulation
Zener Regulation

Supplemental Material

full wave rectifier
Full Wave Rectifier

Supplemental Material

rfid doublers1
RFID Doublers

|RS + jXCB | <

|20xRL + JXCL|

“Short Ckt”

diode switching
Diode Switching

Supplemental Material

diode summary
Diode Summary

Forward bias:

Initially Qp is zero,all If goes to dQp/dt

In steady state ,

Supplemental Material

Charge Storage: The process of excess charge removal to undo the charge just built up.

Until the removal of Qp is complete, diode will continue to remain on with Vd  0.7V.

diode summary1
Diode Summary

Cuttoff: During this transient no substantial amount of excess holes is built up.

id = dQj/dt.

The applied current goes to charge Cj .A simple first order circuit.

Charging of Cj is confirmed by the spike in the current.

Supplemental Material

diode summary2
Diode Summary

Neagtive Ir should confirm

Charge at time t is given by

Supplemental Material

diode summary3
Diode Summary

Reverse recovery:

All of Qp has been swept , and the diode is back at the edge of conduction.

Retraces its initial turn on transient , but in reverse direction.

Id is negative , but is still governed by

Supplemental Material