Sandeep Dhar

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The paper describes a closed-loop controller for adaptive voltage scaling (AVS) where the supply voltage to a standard-cell ASIC is dynamically adjusted to the minimum value required for the desired system speed. The controller includes a clock generator that provides a low-jitter clock to the ASIC at all steady-state operating points and through(More)
– The paper describes switched-capacitor dc-dc converters (charge pumps) suitable for on-chip, low-power applications. The proposed configurations are based on connecting two identical but opposite-phase SC converters in parallel, thus eliminating the need for separate bootstrap gate drivers. We focus on emerging very low-power VLSI applications such as(More)
This paper describes an adaptive power management architecture to reduce power consumption in digital filters. The proposed approach combines two low-power techniques which utilize supply voltage reduction. The first technique, multiple voltage distribution (MVD), attempts to reduce power consumption by assigning reduced supply voltages to circuit modules(More)
– The paper describes a switching regulator system for adaptive voltage scaling (AVS) where the supply voltage to a digital VLSI chip is dynamically adjusted to the minimum value required for the desired system speed. The control loop includes a variable-frequency Watkins-Johnson switching DC-DC converter and a model of the critical path delay of the(More)
Reverse body biasing (RBB) is often used to reduce the leakage power of a device. However, recent research has shown that if this applied RBB is too high, the leakage power can actually increase due to the contribution of Band-to-Band Tunneling (BTBT) currents. Hence, there exists an optimal RBB value at which the leakage is minimum. This optimum point can(More)
Pressure-actuated reed valves play an important role in the compression process of a refrigerator compressor. The material properties and geometrical parameters of the valve and geometrical properties of valve port determine the flow coefficient which in turn impacts the compressor efficiency. Also, the moving mass of the valve and its stiffness governs the(More)
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