A 20 GS/sec analog-to-digital sigma-delta modulator in SiGe HBT technology

Conference PaperinProceedings of the Custom Integrated Circuits Conference · October 2006with12 Reads
DOI: 10.1109/CICC.2006.320909 · Source: IEEE Xplore
Conference: Custom Integrated Circuits Conference, 2006. CICC '06. IEEE


    This paper presents a monolithic continuous-time 2<sup>nd</sup>-order analog-to-digital sigma-delta modulator implemented in third-generation, 200 GHz SiGe HBT technology. The modulator can operate at a sampling rate of 20 GS/sec with SNRs of 30.5 dB over a signal band from DC to 312.5 MHz, and 51 dB over 1 MHz bandwidth. Operating off a +3.5 V power supply, the modulator dissipates a total of 490 mW. The die occupies an area of 1.58 times 1.7 mm<sup>2</sup>