Title :
A 20 MHz QAM chip with numerical controlled carrier generator for research in HDTV
Author :
Shumila, Michael
Author_Institution :
David Sarnoff Res. Center, Princeton, NJ, USA
Abstract :
The implementation of a digital quadrature amplitude modulator/synchronous demodulator with numerical controlled carrier generator for research on high-definition television applications is described. The chip will handle clock rates up to 20 MHz and provide carrier frequencies from 3.0 Hz to 10 MHz in 3 Hz increments using a numerical controlled oscillator (carrier generator). In addition, a +/-360 degree phase shift capability in 0.03 degree increments is also provided. The methodology used to construct this system is a standard cell library using a 1.5 μm CMOS process. Further enhancements on the chip are two compiled ROMs, two 8×8 Booth multipliers, and two FIR notch filters
Keywords :
CMOS integrated circuits; carrier communication; demodulators; digital communication systems; digital integrated circuits; high definition television; modulators; television equipment; 1.5 micron; 20 MHz; 3 Hz to 10 MHz; Booth multipliers; CMOS process; FIR notch filters; HDTV; QAM chip; compiled ROMs; digital quadrature amplitude modulator; high-definition television; numerical controlled carrier generator; numerical controlled oscillator; phase shift capability; standard cell library; synchronous demodulator; Amplitude modulation; Clocks; Demodulation; Digital modulation; Finite impulse response filter; Frequency; HDTV; Quadrature amplitude modulation; Synchronous generators; TV;
Conference_Titel :
Custom Integrated Circuits Conference, 1990., Proceedings of the IEEE 1990
Conference_Location :
Boston, MA
DOI :
10.1109/CICC.1990.124794
