Title :
A 200-MHz quadrature digital synthesizer/mixer in 0.8-μm CMOS
Author :
Tan, Loke Kun ; Samueli, Henry
Author_Institution :
Broadband Telecom Inc., Los Angeles, CA, USA
Abstract :
A 200-MHz quadrature direct digital frequency synthesizer/complex mixer chip is presented. The chip synthesizes sine and cosine waveforms with a spectral purity of 84.3 dBc. The frequency resolution is 0.047 Hz with a corresponding switching speed of 5 ns with a tuning latency of 14 clock cycles. The chip is also capable of frequency, phase and quadrature amplitude modulation. These modulation capabilities operate up to the maximum clocking frequency. The chip provides the capability of parallel operation to achieve either 2 or 4 times the maximum frequency. The 0.8-μm triple level metal N-well CMOS chip has 52,000 transistors in a die area of 2.5×6.1 mm2. Power dissipation is 2 Watts at 200-MHz
Keywords :
CMOS digital integrated circuits; VLSI; digital signal processing chips; frequency modulation; mixers (circuits); phase modulation; quadrature amplitude modulation; 0.8-μm CMOS; 0.8-μm triple level metal N-well CMOS chip; 2 W; 200 MHz; 200-MHz quadrature digital synthesizer; 5 ns; clock cycles; complex mixer chip; cosine waveforms; frequency modulation; frequency resolution; maximum clocking frequency; parallel operation; phase modulation; power dissipation; quadrature amplitude modulation; quadrature digital mixer; sine waveforms; spectral purity; switching speed; tuning latency; Bandwidth; Clocks; Frequency synthesizers; Hardware; Phase modulation; Quadrature amplitude modulation; Read only memory; Switches; Table lookup; Throughput;
Conference_Titel :
Custom Integrated Circuits Conference, 1994., Proceedings of the IEEE 1994
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-1886-2
DOI :
10.1109/CICC.1994.379766
