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PHASE LOCKED LOOP APPLICATIONSSIGNETICS MONOLITHIC PHASE LOCKEDLOOPSDETAILED DESCRIPTION OF 5608, 5618 AND 5628The 560B, 561 Band 562B phase locked loops are allderived from the same monolithic die with different metalinterconnections. Each device contains the same vea,phase detector and voltage regulator stage and, hence, thebasic loop parameters are the same for all three circuits.The 560B is the most fundamental of the three circuits,having a block diagram equivalent to that shown inFigure 8-1. The actual circuit diagram is shown inFigure 8-19.SCHEMATIC DIAGRAM OF 5608VCC@).-----+--~-+-_o @f----I----_-t-----+---+----+---o@LOW PASSFIL TER®Qll.-----+----~------r---r---+---oQV~~i0) ~~~~~~b~TED...I----'~_+_--_+_------_O @ FM/RF INPUTVCOOUTPUT4V~---o@ DE-EMPHASIS7Vr---+-----1~--+-=-='='~"=+--+---+--+---o0VCO FINETUNE CONTROL~-I---.JVII\r--o@CRs8.2K1.2KO TRACKRANGEPHASECOMPARATOR-=- GNDGNDFigure 8-1930