{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Electrical Engineering 105 - Fall 1992 - Howe - Midterm 2

# Electrical Engineering 105 - Fall 1992 - Howe - Midterm 2

This preview shows pages 1–2. Sign up to view the full content.

EE 105, Midterm #2, Fall 1992 EE 105, Fall 1992 Midterm #2 professor Howe Closed book and notes; one formula sheet(both sides) Do all work on exam pages You have 50 min; use your time wisely Problem #1 Bipolar Amplifier Given: npn: ß n =100, Early voltage V A n =100V pnp: ß p =20, Early voltage V A p =50V The voltage V IN is adjusted so that the DC output voltage level V OUT =0V. The resistances roc of the current sources are infinite. The various small-signal resistances referred to in parts(b)-(d) are defined on the schematic. If you do not have time to find numerical values, leave the answer in symbolic form-be sure to include subscripts to identify which transistor the parameter is for. (a) (3 pts) Find the DC values of V CE 1 , V EC 2 , and V CE 3 . You can neglect base currents. (b) (3 pts) Find the numerical value of the input resistance Ri. (c) (4 pts) Find the numerical value of the output resistance of the first stage, Ro1. (d) (4 pts) Find the numerical value of the output resistance Ro. Given: the output resistance of the second stage is Ro2=500KOhm.

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.

{[ snackBarMessage ]}

### Page1 / 3

Electrical Engineering 105 - Fall 1992 - Howe - Midterm 2

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online