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

Volume

28

Issue

12

fYear

1993

fDate

12/1/1993 12:00:00 AM

Firstpage

1331

Lastpage

1339

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 G_m-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; G_m-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;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.262007

Filename

262007