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Design of a Low Power, Variable-Resolution Flash ADC

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4 Author(s)
Veeramachanen, S. ; Centre for VLSI & Embedded Syst. Technol., Int. Inst. of Inf. Technol., Hyderabad ; Kumar, A.M. ; Tummala, V. ; Srinivas, M.B.

In this paper, a low power and variable resolution (adaptive) flash ADC is proposed. The ADC enables exponential power reduction while the reduction in resolution is linear. In the proposed design, unused parallel voltage comparators are switched to standby mode leading to consumption of only the leakage power. The ADC, capable of operating at 4-bit, 5-bit, and 6-bit precision, dissipates 6 mW at 4-bit and 12 mW at 6-bit, and operates at a sampling frequency of 1 to 2 GSPS. The ADC has been designed and simulated in standard 65nm CMOS technology using Cadence tools.

Published in:

VLSI Design, 2009 22nd International Conference on

Date of Conference:

5-9 Jan. 2009