95&auml;&cedil;‹&auml;&iquest;&iexcl;&egrave;™Ÿ&egrave;ˆ‡&ccedil;&sup3;&raquo;&ccedil;&micro;&plusmn

# 95ä¸‹ä¿¡è™Ÿèˆ‡ç³»çµ±

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

Signals and Systems Final Exam 9:20a.m. ~ 11:20a.m., June 22, Fri., 2007 z Closed book, but open 1 sheet (both sides, 2 pages) of personal notes of A4 size z Total score: 120 z Total 3 pages in one B4 sheet 1. [12] A continuous-time LTI system with frequency response () Hj ω is constructed from two continuous-time LTI systems with frequency responses 1 and 2 , respectively. The straight-line approximations of the Bode magnitude plots of 1 and are shown in the following figure. All of the poles and zeros of 1 Hs and are on the real axis. a) [4] Specify 2 if 1 and 2 are connected in cascade form. b) [4] Specify 2 if 1 and 2 are connected in parallel form. c) [4] Specify 2 if 1 and 2 are connected in negative feedback form with 2 in the feedback loop. 2. [12] Figure (a) below shows a model of amplitude modulation system using a pulse-train carrier. a) [4] Let x t be a band-limited signal with ( ) 0 for / X jT ωω π =≥ , as shown above. Determine and sketch R j and Qj . b) [4] Find the maximum value of Δ such that wt xt = with an appropriate filter M j .

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.

## This note was uploaded on 02/21/2012 for the course EE 101 taught by Professor 張捷力 during the Spring '07 term at National Taiwan University.

### Page1 / 3

95ä¸‹ä¿¡è™Ÿèˆ‡ç³»çµ±

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

View Full Document
Ask a homework question - tutors are online