Eleventh  Week - April 2-6

Lecture:

Return Midterm Exam #2. We will move from device models to circuits. The two big important ideas are 1) how the magnitude of the bias, transistor W/L and resistors can also be adjusted to improve performance, and 2) how the connection of the devices gives advantageous performance as voltage amplifiers, current amplifiers and voltage followers. The techniques are similar for Bipolar and MOS devices. Providing a bias current with a current supply and using dual power supplies also help. 

Discussion Sections: 

Supplement Lecture by presentation of important circuits from Chapter 8 that will only be overviewed in class: 1) Common source MOS with current source bias in Example 8.5 pp 487,  2) finding the output resistance for the common emitter amplifier with an emitter degeneration resistor pp. 504-505,, and 3) common gate MOS amplifier pp 513-518.

Laboratories: 

Experiment #8: Single- Stage Amplifiers with Passive Loads - BJT. This week you measure D.C. and small-signal parameters of a simple amplifier biased two ways. Prelab is the large- signal and small-signal analysis of the Bipolar amplifier. See the Prelab information on the lab news web page under updates.

Office Hours:

Due to a trip east on Monday/Tuesday and the Graduate Student Visit day on Thursday, Professor Neureuther's Office Hours this week will be Monday 11:00-11:15, Tuesday None, Wednesday 11-12 and 2-3, Thursday 2-3 (although busy with prospective Graduate Students), Friday 11-12.

Homework:

To jump-start (and not wait 12 days), there will be a very- short (30% of normal) and quick turn-around Problem Set 10 out on Monday April 2 and due on Friday April 6th. This will get us back in phase for Problem Set 11 which will be out on April 4th and due on Friday April 13th. Problem Set 10 is on improving the common-emitter amplifier from the Midterm with a current source bias and dual power supplies and finding the two-port parameters. Problems Set 11 covers the different amplifier configurations and their advantages from Chapter 8. 

Schedule and Assignments:
4/2

Lecture 27 - Brief recap of two-ports and methods of calculating parameters. Common emitter amplifier through extension of Midterm #2 Problem II to a current source bias and dual power supplies. Biasing, Rin, Rout, Gain, effect of bias current and clipping.
Reading - 8.1, 8.2, 8.4, 8.6 

Homework Set 10 circulated.

4/6

Lecture 28 - Highlights of Common-source amplifier. Biasing, Rin, Rout, Gain, effect of bias current, W/L and clipping. Common-emitter amplifier with emitter degeneration resistor.

Reading - 8.3,8.5, 8.7
Homework Set 11 circulated.

4/8

Lecture 29 - Complete Rin and Gm of CE with Re.  Common base amplifier.

Reading - 8.8 

Homework #10 is due in box outside of 277 Cory on way into the classroom at start of class.


Designed and maintained by William Holtz
Version PM04/01/01