Arun Paidimarri, Duixian Liu, et al.
ECTC 2023
An 8-bit digital intensive time-based ADC implemented in 5-nm CMOS is presented in this letter. It proposes a bipolar ramp-based voltage-to-time converter (BVTC) to eliminate the reference voltage and to allow a wide input swing of 0.75 Vpp,diff. A redundancy scheme for the input polarity decision taken for 1-bit voltage domain folding is introduced against wrong decisions which eliminates comparator calibration in analog domain and allows a more efficient design. Sense amplifier latch (SAL) interpolation technique is presented which reduces the power and area consumption when phase interpolating the time-to-digital converter (TDC) signals. The ADC reaches 1 GS/s sampling rate with 0.7-V supply and 1.25 GS/s with 0.8-V supply and achieves 16.6 and 20.3 fJ/conv-step Walden FoM, respectively. The total active area is 313μ m2.
Arun Paidimarri, Duixian Liu, et al.
ECTC 2023
Curtis Durfee, Ivo Otto, et al.
SSDM 2023
Duixian Liu, Xiaoxiong Gu, et al.
ECTC 2023
Pavlos Maniotis, Nicolas Dupuis, et al.
OECC/PSC 2022