Title :
A monolithic analog video comb filter in 1.2-μm CMOS
Author :
Nishimura, Ken A. ; Gray, Paul R.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fDate :
12/1/1993 12:00:00 AM
Abstract :
A fully integrated comb filter for luminance/chrominance (Y/C) separation of NTSC video signals is fabricated using a standard 1.2-μm 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 Gm-enhanced amplifier and techniques to improve the feedback factor. The 11.7 mm2 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
Keywords :
CMOS integrated circuits; active filters; analogue processing circuits; analogue storage; colour television receivers; delay lines; linear integrated circuits; random-access storage; switched capacitor filters; video equipment; video signals; 1.2 micron; 170 mW; 4.2 MHz; 5 V; 51 dB; Gm-enhanced amplifier; NTSC video signals; SC type; adjustment-free circuit; analog RAM structures; analog video comb filter; double-poly CMOS technology; feedback factor; luminance/chrominance (Y/C) separation; monolithic IC; parasitic dominated environment; serial data paths; switched-capacitor techniques; video line delays; Analog memory; CMOS technology; Circuit noise; Decoding; Delay lines; Filtering; Finite impulse response filter; Power dissipation; Read-write memory; Silicon;
Journal_Title :
Solid-State Circuits, IEEE Journal of
