This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: H . Answer 221MHz ECSE-2050 Spring 2007 Introduction to Electronics Problem 3 The BJT in the circuit shown below has β=150, C μ =3.5pF and C π = 110.5pF. Assume that the collector current is 5mA and R 1 //R 2 = 2KΩ. Estimate the upper and lower 3dB frequencies. Answers : 378 Hz, 2.2 MHz ECSE-2050 Spring 2007 Introduction to Electronics Problem 4 Problem 6.122, (a) and (b). Hints; The parameter C je is not used in the solution. Also, if you use the formula sheet for the amplifier configurations, you will need to include the effect of r o . Finally, the arrows point to voltage supplies which are small-signal grounds. Answer : Rin=2.49MΩ, A M =-3994, f H =108 KHz....
View Full Document
- Spring '08
- Hertz, lower 3dB frequency