Title :
A 200 MHz quadrature digital synthesizer/mixer in 0.8 μm CMOS
Author :
Loke Kun Tan ; Samueli, Henry
Author_Institution :
Broadcom Corp., Los Angeles, CA, USA
fDate :
3/1/1995 12:00:00 AM
Abstract :
A 200 MHz quadrature direct digital frequency synthesizer/complex mixer (QDDFSM) chip is presented. The chip synthesizes 12 b 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 and 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 of multiple chips with throughputs up to 800 MHz. The 0.8 μm triple level metal N-well CMOS chip has a complexity of 52000 transistors with a core area of 2.6×6.1 mm2. Power dissipation is 2 W at 200 MHz and 5 V
Keywords :
CMOS digital integrated circuits; VLSI; circuit tuning; digital communication; digital signal processing chips; direct digital synthesis; frequency modulation; frequency synthesizers; mixers (circuits); phase modulation; quadrature amplitude modulation; 0.8 micron; 2 W; 200 MHz; 5 V; 5 ns; 800 MHz; DDS; DSP chip; QAM; frequency modulation; n-well CMOS chip; parallel operation; phase modulation; quadrature amplitude modulation; quadrature digital synthesizer/mixer; triple level metal; Bandwidth; Clocks; Digital communication; Frequency control; Frequency synthesizers; Modems; Read only memory; Signal generators; Table lookup; Throughput;
Journal_Title :
Solid-State Circuits, IEEE Journal of
