1. The phase shift between fi(t) and f:(1) in QAM is a. 90° b. 180° c. 270 d. 360
1. The phase shift between fi(t) and f:(1) in QAM is a. 90° b. 180° c. 270 d. 360
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Transcribed Image Text:1. The phase shift between fi(t) and fa(1) in QAM is
c. 270
a. 90°
b. 180°
d. 360°
2. In envelope detector circuit, the negative half signal of AM signal will
capacitor
the
a. discharge
b. charge
c. a&b
3. LPF has
a. One cutoff frequency
b. two cutoff frequency
c. a&b
4. The normal AM is
a. DSB-SC
b. DSB-LC
c. SSB
5. The transmission bandwidth in FDM must be
the signal to be combined.
a. equal to
the sum of the bandwidths of
b. less than
C. greater than
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