A Fully Synthesizable Dynamic Latched Comparator with Reduced Kickback Noise

Li, Min; Wang, Jue; Cheng, Xu; Zeng, Xiaoyang

doi:10.1109/iscas48785.2022.9937495

Cited by 1 publication

(1 citation statement)

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“…The usual approach to design standard-cell-based latched comparators starts from a NAND-based [3,[6][7][8]46] or NOR-based latch [50,51], and several designs have been presented in the literature to optimize different performances for applications in ADCs and LDOs [9,10,49,[52][53][54][55][56][57]. However, such applications typically focus on different performance parameters, hence proposed designs are not always easy to compare.…”

Section: Introductionmentioning

confidence: 99%

Standard-Cell-Based Comparators for Ultra-Low Voltage Applications: Analysis and Comparisons

Della Sala,

Centurelli,

Scotti

et al. 2023

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This work is focused on the performance of three different standard-cell-based comparator topologies, considering ultra-low-voltage (ULV) operation. The main application scenarios in which standard-cell-based comparators can be exploited are considered, and a set of figures of merit (FoM) to allow an in-depth comparison among the different topologies is introduced. Then, a set of simulation testbenches are defined in order to simulate and compare the considered topologies implemented in both a 130 nm technology and a 28 nm FDSOI CMOS process. Propagation delay, power consumption and power–delay product are evaluated for different values of the input common mode voltage, as a function of input differential amplitude, and in different supply voltage and temperature conditions. Monte Carlo simulations to evaluate the input offset voltage under mismatch variations are also provided. Simulation results show that the performances of the different comparator topologies are strongly dependent on the input common mode voltage, and that the best values for all the performance figures of merit are achieved by the comparator based on three-input NAND gates, with the only limitation being its non-rail-to-rail input common mode range (ICMR). The performances of the considered comparator topologies have also been simulated for different values of the supply voltage, ranging from 0.3 V to 1.2 V, showing that, even if standard-cell-based comparators can be operated at higher supply voltages by scaling their performances accordingly, the best values of the FoMs are achieved for VDD = 0.3 V.

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