NXP Semiconductors TDA9181
The TDA9181 is a an adaptive PAL/NTSC comb filter with two internal delay lines, filters, clock control and input clamps. The selected CVBS input signal is filtered to obtain a combed luminance output signal and a combed chrominance output signal.| Part No. | TDA9181 |
|---|---|
| Datasheet | TDA9181 Download |
| Manufacturer |  NXP Semiconductors |
| Description | Integrated multistandard comb filter |
| Buy | Stock & Price |
FEATURES
● One-chip multistandard adaptive comb filter● Cross luminance reduction
● Cross colour reduction
● No chroma trap, therefore sharper vertical luminance transients
● Analog discrete-time signal processing, therefore no quantization noise
● Anti-aliasing and reconstruction filters are included
● Input switch selects between two Y/CVBS inputs
● Output switch selects between combed CVBS and an external Y/C source
● fSC as well as 2 × fSC colour subcarrier signal may be applied
● Alignment free
● Few external components
● Low power.
GENERAL DESCRIPTION
TDA9181 Video standards PAL B, G, H, D, I, M and N and NTSC M are supported. Two CVBS input signals can be selected by means of an input switch. Switched capacitor circuit techniques are used, requiring an internal clock, locked on to the colour subcarrier frequency. The colour subcarrier frequency as well as twice the colour subcarrier frequency may be applied to the IC. In addition to the comb filter the circuit contains an output switch so that a selection can be made between the combed CVBS signal and an external Y/C signal.
