{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# HH_15_2 - by passing it through a low-pass filter whose...

This preview shows page 1. Sign up to view the full content.

Problem HH15.2 The figure below shows a basic phase detector. An analog signal passes through a linear amplifier whose gain is reversed by a square- wave “reference” signal controlling an FET switch. The output signal passes through a low-pass filter, RC. Let’s assume we apply a signal E s cos( ω t + φ ) to the phase detector with transitions at the zeros of sin ω t, i.e. at t = 0, π / ω , 2 π / ω etc. Let us further assume that we average the output, V out , by passing it through a low-pass filter whose time constant is longer than
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: , by passing it through a low-pass filter whose time constant is longer than one period: τ = RC >> T = 2 π / ω Then the low pass filter output is E s cos( " t + # ) | \$ / % E s cos( t + ) | / 2 / where the brackets represent averages, and the minus sign comes from the gain reversal over alternate half cycles of V ref . Show that V out = " (2 E s / )sin by doing the integrals and assuming unity gain for the amplifier...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern