A 200-MHZ QUADRATURE DIGITAL SYNTHESIZER MIXER IN 0.8-MU-M CMOS

A 200 MHz quadrature direct digital frequency synthesizer/complex mixe r (QDDFSM) chip is presented. The chip synthesizes 12 b sine and cosin e waveforms with a spectral purity of -84.3 dBc, The frequency resolut ion is 0.047 Hz with a corresponding switching speed of 5 ns and a tun ing latency of 14 clock cycles, The chip is also capable of frequency, phase, and quadrature amplitude modulation, These modulation capabili ties operate up to the maximum clocking frequency, The chip provides t he capability of parallel operation of multiple chips with throughputs up to 800 MHz, The 0.8 mu m triple level metal N-well CMOS chip has a complexity of 52000 transistors with a core area of 2.6 x 6.1 mm(2). Power dissipation is 2 W at 200 MHz and 5 V.