MN3870S

CCD Delay Line Series MN3870S NTSC-Compatible CCD Comb Filter with Built-in 1 H Video Signal Delay Element Overview The MN3870S is a 4 fSC CMOS CCD comb filter with a built-in 4 fSC CMOS CCD signal delay element for video signal processing applications. It contains such components as a fourfold-frequency circuit, a shift register clock driver, a CCD analog shift register switchable between 911, 1 and 908 / 906 stages, and a resampling output amplifier. It samples the input using the supplied clock signal with a frequency of four times the color signal subcarrier frequency (3.58 MHz) and subtracts between the 911- and 1-stage CCD output signals to produce the color signal comb characteristics for the NTSC system. It also uses this fourfold frequency to drive a 908- or 906-stage CCD and samples the input to produce, after adding in the attached filter delay, a delay of 1 H (the horizontal scan period) when the SW pin is left open. Pin Assignment X1 VBB N.C. VGC1 VOC VINC N.C. N.C. VSS1 VDD1 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 PCOUT & VCOIN N.C. VSS3 VDD3 VDD2 VSS2 VGC2 SW VINY VOY Features Single 5.0 V power supply Low power consumption based on CMOS process Low EMI levels from clock during driving True comb filter produced by the subtraction of the through signal and the 1 H delay signal ( TOP VIEW ) SOP020-P-0300C Applications VCRs, Video cameras 1 MN3870S Block Diagram CCD Delay Line Series VGC1 16 V DD2 10 17 13 Clamp circuit Bias circuit ...