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- W2895895182 abstract "The opamp in the integrators of a continuous-time delta-sigma modulator (CTDSM) has stringent noise and linearity requirements, which lead to large power dissipation. In this paper, a negative-R assisted integrator is proposed to mitigate the opamp's requirements including dc gain, unity gain bandwidth, thermal and 1/f noise, and linearity, thus enabling a drastic power reduction. We present two prototype CTDSMs using the negativeR assisted integrators that employ a single-bit and tri-level feedback digital-to-analog converter (DAC), respectively. The prototype CTDSMs were fabricated in 65-nm CMOS technology. The first CTDSM using a single-bit feedback DAC achieves dynamic range (DR)/signal to noise and distortion ratio (SNDR)/spuriousfree dynamic range (SFDR) of 93.1/88.5/100.5 dB in a 20-kHz bandwidth while dissipating only 55 μW from a 1.2-V supply. The second CTDSM, with a tri-level feedback DAC, achieves DR/SNDR/SFDR of 98.2/94.1/107 dB in a 24-kHz bandwidth while dissipating only 68 μW from a 1.2-V supply. The figures of merit of the two CTDSMs are 178.7 and 183.6 dB, respectively, which are the best energy efficiency among state-of-the-art works." @default.
- W2895895182 created "2018-10-26" @default.
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- W2895895182 date "2019-01-01" @default.
- W2895895182 modified "2023-10-16" @default.
- W2895895182 title "Analysis and Design of Low-Power Continuous-Time Delta-Sigma Modulator Using Negative-R Assisted Integrator" @default.
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- W2895895182 doi "https://doi.org/10.1109/jssc.2018.2871111" @default.
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