Midterm Exam 2 Solutions 08

B find the small signal parameters of the main

Info iconThis preview shows page 1. Sign up to view the full content.

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

Unformatted text preview: lifier. b) Find the small-signal parameters of the main amplifier transistor ( rπ , gm , r0 ). [3pts] Note 1. 1 mA 1 S 26 2.6 kΩ 50 kΩ c) Find the expression and the value of the voltage gain. [4pts] Note . 1 1 1 1 Page 4 1 0.975 d) Show all parasitic capacitances of the BJTs in the circuit diagram above. Simplify the capacitances (e.g., combine all capacitances in parallel, remove capacitances that are shorted). Redraw the circuit diagram below with the simplified capacitances. [Hint: a constant DC voltage is AC ground]. [5pts] Here’s the circuit with all parasitic capacitances: And the one with the capacitances simplified: Page 5 e) Find the input and output poles of this circuits. What is the dominant pole? Find the 3-dB bandwidth of this...
View Full Document

This note was uploaded on 01/24/2014 for the course EE 105 taught by Professor King-liu during the Spring '07 term at University of California, Berkeley.

Ask a homework question - tutors are online