Home> Schools> University of California, Berkeley> Electrical Engineering (ELENG)> ELENG 105> Lecture 38

Berkeley ELENG 105 - Lecture 38 (10 pages)

Previewing pages 1, 2, 3 of 10 page document View the full content.
View Full Document

Lecture 38



Previewing pages 1, 2, 3 of actual document.

View the full content.
View Full Document
View Full Document

Lecture 38

103 views


Pages:
10
School:
University of California, Berkeley
Course:
Eleng 105 - Microelectronic Devices and Circuits
Microelectronic Devices and Circuits Documents

Unformatted text preview:

EECS 105 Spring 2002 Lecture 38 R T Howe Lecture 38 Last time CMOS cascode transconductance amplifier design example Today BiCMOS voltage amplifier example of dissection technique for a complicated circuit Dept of EECS University of California at Berkeley EECS 105 Spring 2002 Lecture 38 R T Howe Multi Stage Voltage Amplifier Dept of EECS University of California at Berkeley EECS 105 Spring 2002 Lecture 38 R T Howe Cutting Through the Complexity Two Approaches 1 Eliminate background transistors to reduce clutter 2 Identify the signal path between the input and output Dept of EECS University of California at Berkeley EECS 105 Spring 2002 Lecture 38 R T Howe First Approach Find I V Sources Dept of EECS University of California at Berkeley EECS 105 Spring 2002 Lecture 38 R T Howe What s Left Voltage at base of Q2 is set by totem pole Dept of EECS University of California at Berkeley EECS 105 Spring 2002 Lecture 38 R T Howe Second Approach Find Signal Path Dept of EECS University of California at Berkeley EECS 105 Spring 2002 Lecture 38 R T Howe Identifying the Stages First stage or two stages CS CB cascode Second stage or two stages CD CC voltage buffer Why does this make sense for a voltage amplifier Dept of EECS University of California at Berkeley EECS 105 Spring 2002 Lecture 38 R T Howe Find Key Two Port Parameters Output resistance of cascode Rout CS CB roc ro 2 1 g m 2 r 2 RS 2 roc Rup ro 6 1 g m 6 RS 6 Dept of EECS University of California at Berkeley EECS 105 Spring 2002 Lecture 38 R T Howe Two Port Parameters Cont Dept of EECS University of California at Berkeley EECS 105 Spring 2002 Lecture 38 R T Howe Output Resistance and Voltage Gain Source resistance of the CC stage is the output resistance of the CD stage small Rout Rout CC RS CC 1 1 1 1 gm4 o g m 4 g m3 o g m 4 Open circuit voltage gain Av last two stages have nearly unity gain Av g m1 o ro 2 ro 6 1 g m 6 ro 7 Dept of EECS University of California at Berkeley


View Full Document

Popular Documents 

Lecture 11 Bipolar Amplifiers (Part 1)

Lecture 11 Bipolar Amplifiers (Part 1)

ELENG 105 (Berkeley)

Bipolar Junction Transistor Amplifiers – Frequency Response

Bipolar Junction Transistor Amplifiers –...

ELENG 105 (Berkeley)

Review, PN junctions, Fermi levels, forward bias

Review, PN junctions, Fermi levels, forw...

ELENG 105 (Berkeley)

Digital Multimeter

Digital Multimeter

ELENG 105 (Berkeley)

Lecture Notes

Lecture Notes

ELENG 105 (Berkeley)

Popular Course Packets 

Popular Flashcards 

Reviews

I found the perfect study guide and several practice exams to help me focus on what's important for the midterm.

-- Jessica S., UCLA

The best part of GradeBuddy is having the ability to understand coursework and study for exams based off other students' experiences.

-- Valerie A., USC

Through GradeBuddy Premium I discovered the best study resources I needed to do well on my exams.

-- Tim M., Texas A&M

Access the best Study Guides, Lecture Notes and Practice Exams

Please select your school

Login

Join to view Lecture 38 and access 3M+ class-specific study document.

Continue Continue
or
We will never post anything without your permission.
Don't have an account?

We couldn't create a GradeBuddy account using Facebook because there is no email address associated with your Facebook account.

Link an email address with your Facebook below or create a new account.

Sign Up

Join to view Lecture 38 and access 3M+ class-specific study document.

Continue Continue
or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?

We couldn't create a GradeBuddy account using Facebook because there is no email address associated with your Facebook account.

Link an email address with your Facebook below or create a new account.