Question

Consider the square law detector using a non-linear device whose transfer function characteristics is defined by:

V₂(t) = a₁V₁(t) + a₂V₁² (t)

a₁ , a₂ = Constants

V₁ = Input

V₂ = Output

V₁(t) has the AM wave:

V₁(t) = A_C [1 + K_a m(t)] Cos (2πf_ct)

A) Evaluate V₂(t)

B) What are the conditions for which m(t) can be recovered from V₂(t)

C) Draw a block diagram of the system

Answer 1