Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

Browse

Filters

20184

Settings

Author: search.filters.author.Laxminidhi, L.Has files: No

Search Results

Now showing 1 - 4 of 4
  • No Thumbnail Available
    Item
    A Novel Zero Blind Zone Phase Frequency Detector for Fast Acquisition in Phase Locked Loops
    (IEEE Computer Society help@computer.org, 2018) Kuncham, S.S.; Gadiyar, M.; Sushmitha Din, K.; Lad, K.K.; Laxminidhi, L.
    The inability to sense the transitions in the input by conventional phase frequency detector (PFD) during the reset operation leads to blind zone, which reduces the acquisition speed and the detection range. The pull down network in proposed design is modified so as to eliminate the reset pulse for phase difference beyond the dead zone in order to have a full detection range and less cycle slippage. As the design gives the right polarity for phase differences close to ±2π, the acquisition time is reduced substantially. The Transfer characteristic of the PFD manifests an identical response. The PFD design is implemented in 180nm CMOS technology and consumes 1.36mW at an operating frequency of 1GHz. © 2018 IEEE.
  • No Thumbnail Available
    Item
    Single inductor dual output buck converter for low power applications and its stability analysis
    (IEEE Computer Society help@computer.org, 2018) Sankaranarayanan, S.; Vinod, K.C.; Sreekumar, A.; Laxminidhi, L.; Singhal, V.; Chauhan, R.
    The applications like sensor nodes and wearables, which run on coin/button cell and/or harvested energy source need small form factor and very low power consumption. A single inductor multiple output (SIMO) converter provides saving on inductor count and hence becomes a right choice for such applications. This paper presents a single inductor dual output (SIDO) buck converter targeting light load applications. The architecture uses discontinuous conduction mode (DCM) with pulse frequency modulation (PFM) control and the switching scheme ensures almost zero cross-regulation. The proposed converter is simulated in 180 nm CMOS technology showing zero cross-regulation. An efficiency of above 88% is achieved considering inductor and package losses in load range of micro-Amperes to a few milli-Amperes. This paper also presents a detailed stability analysis and model for the selected SIMO architecture along with some interesting observations and inferences derived from this analysis. © 2018 IEEE.
  • No Thumbnail Available
    Item
    Human Muscle Energy Harvesting: Models and Application for Low Power Loads
    (IEEE Computer Society help@computer.org, 2018) Shenoy, B.B.; Laxminidhi, L.; Shripathi Acharya, U.S.; Mitra, J.
    This paper presents models for human muscle power which can be harvested and utilized for low power applications. The low power application considered in this paper is the case of off-grid rural electrification, where a person in a rural area uses a bicycle-based human power generating system to charge a battery for the purpose of lighting his home with a few low-wattage LED lamps during periods of necessity. In this regard, two methods to convert energy from human muscle activity into useful electricity by utilizing the commonly available bicycle are proposed and presented with hardware results. The presented hardware results prove that power of the order of 50 W can be successfully generated using these methods. Another important feature is that, the methodology involved in generating useful electricity is carbon-free and power can be generated at any given point of time regardless of location or the associated climatic condition. © 2018 IEEE.
  • No Thumbnail Available
    Item
    91dB dynamic range 9.5nW low pass filter for bio-medical applications
    (IEEE Computer Society help@computer.org, 2018) Jayaram Reddy, M.K.; Polineni, S.; Laxminidhi, L.
    This paper presents a second order, fully differential, low pass filter. The filter has a tunable bandwidth in the range 4 Hz to 100 Hz and offers a dynamic range of 91 dB. The filter is based on the source-follower biquad operating in the sub-Threshold region. The main idea is to exploit the strengths of sub-Threshold source follower circuit, like low noise, low output impedance, high linearity and low power. The filter design has been validated in UMC 0.18 um CMOS process. The filter consumes only 9.5 nW of power at 1.8 V supply, making it suitable for bio-medical applications. In terms of noise and dynamic range the reported filter is better than previous works found from the literature. © 2018 IEEE.