Lecture_25

# Lecture_25 - 6 kΩ 50 kΩ 12 V 1.2 V EE 310 Lecture 25...

This preview shows pages 1–7. Sign up to view the full content.

EE 310 Lecture 25 Basic Transistor Applications Switching OFF State: ON State: Lecture 25 Page 1

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Switching Example V BE (on) = 0.7 V, β = 50, V CE (sat) = 0.2 V, V γ LED = 1.5 V Choose values for R and R B to give a forward current, I C , of 12 mA when V I = 5V. Design for a base current overdrive factor of 2.5 Calculate the power dissipated in the transistor. I C I B EE 310 Lecture 25 Lecture 25 Page 2
Basics of Amplification V BE (on) = 0.7 V, β = 120 EE 310 Lecture 25 Lecture 25 Page 3

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
AC Amplification Illustrated V BE (on) = 0.7 V, β = 100, V CC = 12 V, V BB = 1.2 V Illustrate the current and voltage waveforms for this circuit with v s = 250 sin ( ωt ) mV.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 6 kΩ 50 kΩ +12 V +1.2 V EE 310 Lecture 25 Lecture 25 Page 4 Modeling Bipolar Transistor Amplifiers What is r π ? What is g m ? What is r o ? EE 310 Lecture 25 Lecture 25 Page 5 Derivation of Model Parameters -g m Transistor Equation: Expand into DC + AC terms: Taylor Series Approximation: ... ! 3 ) ( ! 2 ) ( 1 3 2 ax ax ax e ax EE 310 Lecture 25 Lecture 25 Page 6 Derivation of Model Parameters -r π and r o Find the input resistance of the model: Find the output resistance of the model: EE 310 Lecture 25 Lecture 25 Page 7...
View Full Document

{[ snackBarMessage ]}

### Page1 / 7

Lecture_25 - 6 kΩ 50 kΩ 12 V 1.2 V EE 310 Lecture 25...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online