U3660M-B

U3660M-B Baseband Delay Line (64 ms) Description The U3660M is an integrated baseband delay line circuit. It provides a delay of 64 ms for the color difference signals, ±(R-Y) and ±(B-Y), in multi-standard TVs. Features D One line delay time, addition of delayed and nondelayed output signals D Adjustment-free application, VCO without external components D Line-locked by the sandcastle pulse D No crosstalk between SECAM colour carriers (diaphoty) D Handles negative or positive colour-difference input signals D Comb filtering functions for NTSC colour-difference signals D Clamping of ac-coupled input signals [±(R-Y) and ±(B-Y)] D Correction of phase errors in the PAL system Block Diagram Ref 13 Bias "(B–Y) 14 "(R–Y) 16 Vref Clamping Line memory Shift register Clamping S+H S+H LPF + 12 "(B–Y) "(R–Y) Line memory Vref + 11 LPF 3 MHz fsc V DD2 GND2 1 SC detector Control 9 V DD1 GND1 Clock generator PLL 3 5 10 94 8223 SSC pulse Figure 1. Block diagram TELEFUNKEN Semiconductors Rev. A2, 13-Dec-96 1 (7) U3660M-B Pin Description VDD2 NC GND2 NC SC NC NC NC 1 2 3 4 5 6 7 8 95 11252 16 Vi(R-Y) 15 NC 14 Vi(B-Y) 13 Rref 12 VO(B-Y) 11 VO(R-Y) 10 GND1 9 VDD1 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol VDD2 NC GND2 NC SC NC NC NC VDD1 GND1 VO(R-Y) VO(B-Y) Rref Vi(B-Y) NC Vi(R-Y) Function Supply voltage for digital part Not connected Ground for digital part Not connected Sandcastle pulse input Not connected Not connected Not connected Supply voltage for ana...