545

EiInEtiEf, DESCRIPTION T h e N E 5 4 5 i s t h e m o n o l i t h i c i m p l e m e n t a t i o no f t h e D o l b y " B n o i s e r e d u c t i o n s y s t e m .T h i s c i r c u i t i s u s e d t o r e d u c et h e level of background noise introduced during recording and p l a y b a c ko f a u d i o s i g n a l s o n m a g n e t i ct a p e , a n d t o i m p r o v e t h e n o i s e l e v e l i n F M b r o a d c a s tr e c e p t i o n . T h i s c i r c u i t i s o f D o l b y L a b s . L i c e n s i n ga n d a v a i l a b l eo n l y t o l i c e n c e e s application information may be obtained from Dolby L a b s .L o n d o n o r N e w Y o r k . NOISE DOLBY.B PROCESSOR 545 INTEGRAIED LINEAR CIRCUITS ( T o pV i e w ) P I NC O N F I G U R A T I O N B PACKAGE Input Input By Pass Output By Pass Reference Reference lnput Input Output Output ABSOLUTE M A X IM U M R A T I N G S Supply Voltage O p e r a t i o nT e m p e r a t u r eR a n g e S t o r a g eT e m p e r a t u r eR a n g e L e a d T e m p e r a t u r e( S o l d e r i n g , 60 sec.) 24 Volts 9"6 1e+70"C 65"C to +i50"C +300"C O utput By Pass By Pass G rou nd Order Part No. NE545B BLOCK DIAGRAM D I R C U I II D O L B YA T Y P EI N T E G R A T E C S I G N E T I CN SE 5 4 5 A 15 J Free Datasheet http://www.datash R 545 D O L B Y - BN O I S E P R O C E S S O T SIGNETICS ELECTR I C A LC H A R A C T EIR STICS s therwise Noted) r e f e r e n c etd o 5 8 0 m V R M S ( 0 d B )a t P i n 3 , T A = + 2 5 " C( U...