P
Prabu Sankar
Researcher at Indian Institute of Technology Madras
Publications - 9
Citations - 372
Prabu Sankar is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Delta-sigma modulation & Operational amplifier. The author has an hindex of 7, co-authored 9 publications receiving 355 citations. Previous affiliations of Prabu Sankar include Indian Institutes of Technology.
Papers
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Journal ArticleDOI
A Power Optimized Continuous-Time $\Delta \Sigma $ ADC for Audio Applications
TL;DR: The converter, designed in a 0.18 mum CMOS technology, achieves a dynamic range of 93.5 dB in a 24 kHz bandwidth and dissipates 90 muW from a 1.8 V supply.
Journal ArticleDOI
Power Reduction in Continuous-Time Delta-Sigma Modulators Using the Assisted Opamp Technique
Shanthi Pavan,Prabu Sankar +1 more
TL;DR: The “assisted opamp” integrator is introduced, which is a way of achieving low distortion operation with low power consumption and circuit implementations of the technique for single-bit modulators using NRZ and switched-capacitor-resistor feedback DACs are presented.
Journal ArticleDOI
Active-RC Filters Using the Gm-Assisted OTA-RC Technique
TL;DR: The Gm-assisted OTA-RC technique is explored, which is a way of combining GM-C and active-RC integrators in a manner that enhances the linearity and speed of the latter, while adding negligible extra noise or power dissipation.
Journal ArticleDOI
Analysis of Integrator Nonlinearity in a Class of Continuous-Time Delta–Sigma Modulators
Prabu Sankar,Shanthi Pavan +1 more
TL;DR: It is shown that integrator nonlinearity results in an increased in-band noise (IBN) floor when a multibit quantizer is used in the loop, and analytical relations for the IBN spectral density for several opamp topologies are developed.
Proceedings ArticleDOI
A 110µW single bit audio continuous-time oversampled converter with 92.5 db dynamic range
Shanthi Pavan,Prabu Sankar +1 more
TL;DR: The assisted opamp integrator is introduced that addresses the problem of significant power consumption in a low pass continuous-time ΔΣ modulator and achieves 92.5 dB dynamic range in a 24 kHz bandwidth and dissipates 110 µW from a 1.8V supply.