Paulos, John, Dr.2018-10-152018-10-1519961996Paulos, J. (1996). Instrumentations circuits : lecture 20. North Carolina University, United Stateshttp://196.43.179.3:8080/xmlui/handle/123456789/149Lecture 20 discusses phase comparator, loop filter and VCO - in detail the instructor provide detailed illustrations that demostrate an electronic circuit for comparing two electrical signals; and standards for comparison. Further looks at phase-locked loop and how they are implemented.en-USPhase comparatorLoop filterVCOPhase-locked loopVideo