Abstract- In this work we present recent results on high-speed, multi-Nyquist Digital-to-Analog Converter (DAC) capable of RF signal generation well above 10GHz. The DAC is implemented Teledyne's InP double heterojunction bipolar transistor (DHBT) with 0.5im emitter width. The technology offers four level of gold interconnect with BCB dielectric, and thin-film resistor and MIM capacitor are available. Return-to-Zero (RZ) current switches are added to current steering DAC for high frequency wideband applications to achieve higher than 1GHz bandwidth. When clocked at 2.3GHz, the DAC output measures better than 60dB spurious-free dynamic range (SFDR) at 1GHz output frequency. With 2.7GHz data clock and 8.1GHz RZ clock, the measured performance is >50dBc SFDR at 8GHz output frequency. The chip measures 1450 x 2100im including bonding pads and dissipates 1.6 watt power.
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机译：摘要-在这项工作中，我们介绍了高速，多奈奎斯特数模转换器（DAC）的最新结果，该转换器能够产生远高于10GHz的RF信号。 DAC由Teledyne的InP双异质结双极晶体管（DHBT）实现，发射极宽度为0.5im。该技术提供了与BCB电介质的四级金互连，并提供了薄膜电阻器和MIM电容器。零归零（RZ）电流开关被添加到电流控制DAC中，用于高频宽带应用，以实现高于1GHz的带宽。当时钟频率为2.3GHz时，DAC输出在1GHz输出频率下的测量结果优于60dB的无杂散动态范围（SFDR）。使用2.7GHz数据时钟和8.1GHz RZ时钟，在8GHz输出频率下测得的性能> 50dBc SFDR。该芯片尺寸为1450 x 2100im（包括焊盘），耗散1.6瓦功率。
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