Problem 5:In this problem, we study the idea of mixing in a super-heterodyne receiver. To bespecific, consider the block diagram of the mixer shown below.u1(t)s(t) ×Band-passfilteru2(t)cos(2π fl t)The demodulator consists of a product modulator with a local oscillator of variablefrequency fl followed by a band-pass filter. The input signal is an AM wave of bandwidth10 KHz and a carrier frequency that may lie anywhere in the rage 0.535-1.605 MHz; theseparameters are typical of AM radio broadcasti

An improved signal processing circuit design of heterodyne dual-frequency laser interference displacement measurement system