2026-09-20T07:47:38Zhttps://digital.lib.washington.edu/server/oai/request

oai:digital.lib.washington.edu:1773/484222026-02-16T02:19:28Zcom_1773_4888col_1773_49166

Rudell, Jacques C Zhao, Ivan 2022-04-19T23:41:39Z 2022-04-19T23:41:39Z 2022-04-19 2021 Zhao_washington_0250O_22700.pdf http://hdl.handle.net/1773/48422 Thesis (Master's)--University of Washington, 2021 The movement towards higher data rates has placed pressure on A/D converter systems to achieve a higher sample rate and bandwidth. This thesis aims to explore and implement a nascent idea of using a reconfigurable, oversampled 1-bit converter to achieve a high signal bandwidth and lower power consumption for future use in mm-Wave 5G radios or phased array systems. The following sections introduces the design process and architecture of a multi-stage Delta-Sigma ADC using a 2x interleaved 1-bit converter that is used in a 50-58GHz 2x2 phased-array (RX) for 5G communication system designed in TSMC 28nm CMOS. The overall phased-array system is given along with a breakdown of the ADC’s system functionality with an open-loop 1-bit interleaved comparator and the closed-loop operation of a Delta-Sigma ADC. The clock rate for the implemented chip is 4GHz with an effective sample rate of 8Gs/s with the interleaved comparators. The interface between the ADC and the digital systems has an 8x polyphase decimation filter to down sample the output of the ADC bit stream by a factor of 8. The maximum achievable SNDR for the Delta-Sigma stage was 24.7dB with a dynamic range of 27dB. This ADC prototype aims to demonstrate the feasibility of using low-resolution ADCs for digital beamforming for future systems to save on power, area, and complexity for future applications in mm-Wave radios for faster data rates. application/pdf en_US CC BY 5G ADC Data Converters delta sigma millimeter wave phased array Electrical engineering Custom High-Speed ADC for mmWave Digital Beamformers Thesis Open Access open.access