Abstract
A 14-bit current-steering DAC utilizing parallel current memories operating as a deglitcher is presented. The high linearity of the current memories is based on a memory MOS transistor biased in the triode region and a bootstrapped sampling switch. The prototype circuit is implemented using a 0.35-μm BiCMOS (SiGe) technology and it occupies 5.7 mm2 of silicon area. According to measurements, THD is −66.8 dBc with a 9.1-MHz input signal and 30-MHz clock frequency. Two-tone test gives intermodulation levels below 68 dBFS at 40-MS/s sampling rate. The power dissipation is 370 mW from a 3-V supply.
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