AN5693

ICs for TV AN5637 SECAM decoder IC s Overview The AN5637 is a chroma signal processing circuit for use in SECAM system. It outputs the color difference signal. 19.2±0.3 16 9 6.2±0.3 Unit : mm s Features Built-in bell filter, deemphasis circuit One point adjustment Small number of external components 1 8 3.55±0.05 SECAM system TV (0.71) Seating plane 2.54 0.5±0.1 1.22±0.25 1.10±0.25 3.05±0.25 s Applications 5.20±0.25 7.62±0.25 5° 3° to 1 +0.10 0.30 – 0.05 DIP016-P-0300D 1 2 Bell Ref. Killer Mon. Bell Mon. 11 2 7 B AN5637 s Block Diagram Limiter Amp. V V Inversion C-In Limiter Amp. B 16 Bell Filter IH FF ACC Amp. H.VBLK generation 15 SCP In B V ID discrimination ACC Det. (VBLK,BGP,Signal) Amp. V/I conversion Current shift B Reset pulse generation B BGP generation V Internal discrimination SECAM/Non-SECAM VBLK generation ID/fref 1 Limiter Amp. V/I conversion Phase Det. Loop Filter External discrimination SECAM/Non-SECAM ICO 14 N.C. Output Filter R−Y Amp. De-Emp. V Band Gap 13 N.C. 12 Output Filter B−Y Amp. N.C. 10 9 4 6 3 5 8 PLL Ref. VCC GND ICs for TV −(R−Y) Out −(B−Y) Out ICs for TV s Pin Descriptions Pin No. 1 Description Reference frequency signal/ Ident input pin 2 3 4 5 Bell filter output monitor pin Power supply pin Black level adjustment voltage input pin Black level adjustment reference voltage output pin 6 7 Grounding pin Bell filter automatic adjustment sample hold pin 9 10 11 12 13 14 15 16 Pin No. 8...