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This paper presents a 12 GHz direct digital synthesizer (DDS) MMIC with 9-bit phase and 8-bit amplitude resolution implemented in a 0.18 mum SiGe BiCMOS technology. Composed of a 9-bit pipeline accumulator and an 8-bit sine-weighted current-steering DAC, the DDS is capable of synthesizing sinusoidal waveforms up to 5.93 GHz. The maximum clock frequency of the DDS MMIC is measured as 11.9 GHz at the...
This paper presents a low power SiGe DDS MMIC with 9-bit phase and 8-bit amplitude resolution. Using more than 9600 transistors, the active area of the DDS is 2.3 × 0.7 mm2. The maximum clock frequency was measured at 9.6 GHz with 4.8 GHz Nyquist output. The DDS MMIC consumes 1.9 W power consumption under 3.3 V/4.0 V dual power supplies. The DDS achieves the best reported power efficiency figure of...
This paper describes a 9-bit, 6.3GHz low power quadrature DDS implemented in a 0.18mum SiGe BiCMOS technology. With a 9-bit accumulator and two sine-weighted DACs, this DDS is capable of generating quadrature sinusoidal waveforms up to 3.15GHz. The quadrature DDS MMIC occupies an active area of 2.3x2.5mm2 and consumes a total 2.5W power.
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