In the equation x(t) = a(t)cos[2πFct+θ(t) ], Which of the following relations between a(t) and x(t), θ(t) and x(t) are true?
A. a(t), θ(t) are called the Phases of x(t)
B. a(t) is the Phase of x(t), θ(t) is called the Envelope of x(t)
C. a(t) is the Envelope of x(t), θ(t) is called the Phase of x(t)
D. None of the mentioned
Answer:A
In the equation x(t) = a(t)cos[2πFct+θ(t) ], Which of the following relations between a(t) and x(t), θ(t) and x(t) are true?
A. a(t), θ(t) are called the Phases of x(t) B. a(t) is the Phase of x(t), θ(t) is called the Envelope of x(t) C. a(t) is the Envelope of x(t), θ(t) is called the Phase of x(t) D. None of the mentioned
Explanation: In the equation x(t) = a(t) cos[2πFct+θ(t) ], the signal a(t) is called the Envelope of x(t), and θ(t) is called the phase of x(t)