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—A passive 2 nd-order sigma-delta modulator based on a cascade of first-order lowpass filters was designed, fabricated, and tested. A lumped RC filter is added in the loop of a conventional 1 st-order passive sigma-delta modulator in order to improve the linearity of its transfer function. A low power edge-triggered comparator was designed and fabricated(More)
  • A. Roy
  • 2012
Employing a 90-nm CMOS process, this article presents a high-gain, low-power (9.2 mW), highly-linearized (IIP3: 8.5 dBm), buffered amplifier for satellite applications near the lower edge of K<sub>u</sub>-band (14.2 GHz). Over the frequencyband of interest (13.2-15.4 GHz), the amplifier achieves low noise contribution (&lt;;3.41 dB) and excellent(More)
  • A. Roy
  • 2012
In this paper, we present a K<sub>a</sub>-band (27GHz), lowpower (7.1mW), low-noise (3.5dB) amplifier built on a 1.2-V CMOS process. New impedance and noise matching techniques are introduced to the proposed architecture through reactive inter-stage gain boosting and coupling of input matching inductors. On a platform of 0.09-&#x03BC;m IBM CMOS technology,(More)
Hawking's argument about non-unitary evolution of black holes is often questioned on the ground that it doesn't acknowledge the quantum correlations in radiation process. However, recently it has been shown that adding `small' correction to leading order Hawking analysis, accounting for the correlations, doesn't help to restore unitarity. This paper(More)
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