Title :
A CMOS continuous-time NTSC-to-color-difference decoder
Author :
Parker, James F. ; Current, K. Wayne ; Lewis, Stephen H.
Author_Institution :
Solid-State Circuits Res. Lab., California Univ., Davis, CA, USA
fDate :
12/1/1995 12:00:00 AM
Abstract :
A continuous-time NTSC-to-color-difference decoder has been fabricated in a 2-μm CMOS process. The 9-mm2 decoder includes the chrominance IF filter, automatic gain control, timing recovery, 90° phase shift, demodulators, hue and saturation controls. The 90° phase-shift circuit is based on peak detection and is used for tuning the chrominance IF filter and demodulation of the R-Y signal. The total power dissipation is 45 mW on ±2.5-V supplies. All circuits are fully differential. This allows the timing-recovery outputs to achieve a differential phase of 0.1° over a horizontal-line interval. For a standard NTSC 1 Vp-p color-bar input, the R-Y and B-Y outputs exhibit maximum phase and gain errors of 1.1° and 1.5°, respectively
Keywords :
CMOS analogue integrated circuits; analogue processing circuits; automatic gain control; circuit tuning; continuous time systems; decoding; demodulation; timing; video coding; video equipment; 2 micron; 2.5 V; 45 mW; 90° phase shift circuit; AGC; CMOS continuous-time decoder; CMOS process; NTSC-to-color-difference decoder; R-Y signal demodulation; automatic gain control; chrominance IF filter; demodulators; fully differential circuits; hue control; peak detection; saturation control; timing recovery; tuning; Automatic control; CMOS process; Circuit optimization; Decoding; Demodulation; Filters; Gain control; Phase detection; Power dissipation; Timing;
Journal_Title :
Solid-State Circuits, IEEE Journal of
