A monolithic analog video comb filter in a 1.2 mu m CMOS

A fully integrated comb filter for luminance/chrominance (Y/C) separation of NTSC video signals is fabricated using a standard 1.2- mu m double-poly CMOS technology. This paper demonstrates its use of analog RAM structures in the realization of video line delays. Information is stored and retrieved using switched-capacitor techniques optimized for operation in a parasitic dominated environment. Fixed pattern noise is avoided through the use of serial data paths whenever possible, necessitating the use of a G/sub m/-enhanced amplifier and techniques to improve the feedback factor. The 11.7 mm/sup 2/ adjustment-free circuit, which requires a single clock and reference current, dissipates 170 mW at 5 V and yields an SNR of 51 dB and frequency response flat within 1.1 dB to 4.2 MHz. >

[1]  L.C. Sood,et al.  A fast 8Kx8 CMOS SRAM with internal power down design techniques , 1985, IEEE Journal of Solid-State Circuits.

[2]  R. I. Kung,et al.  A 21-ns 32 K/spl times/8 CMOS static RAM with a selectively pumped p-well array , 1987 .

[3]  K. Matsui,et al.  CMOS video filters using switched capacitor 14 MHz circuits , 1985 .

[4]  Joseph Roizen,et al.  Improving NTSC to Achieve Near-RGB Performance , 1987 .

[5]  H. Moriyama,et al.  A CCD TV signal processor , 1984, 1984 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.

[6]  Gabor C. Temes,et al.  Narrow-band switched-capacitor bandpass filters , 1982 .

[7]  R. I. Kung,et al.  Two-13 ns-64K CMOS SRAM's with very low active power and improved asynchronous circuit techniques , 1986 .

[8]  D. Sauer,et al.  A CCD comb filter IC for TV receivers , 1980, 1980 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.

[9]  Roberto Guerrieri,et al.  Random Access Analog Memory for Early Vision , 1991, ESSCIRC '91: Proceedings - Seventeenth European Solid-State Circuits Conference.

[10]  Germano Nicollini,et al.  A fully differential sample-and-hold circuit for high-speed applications , 1989 .

[11]  David A. Hostetler.  A digital CMOS 2H adaptive comb filter IC , 1989, International 1989 Conference on Consumer Electronics.