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A low-power 416-lag 1.5-b 0.5-TMAC correlator in 0.6-μm CMOS

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4 Author(s)
Edman, A. ; SwitchCore AB, Lund, Sweden ; Christensen, J. ; Emrich, A. ; Svensson, C.

The autocorrelation spectrometer is an important instrument for radio astronomy. In satellite-based spectrometers, low power consumption is essential. The correlator chip presented in this paper reduces the power consumption more than five times compared to other full-custom designs. This has been achieved by reducing the number of clocked transistors, using a compact layout of cells, which reduces wire lengths, and using parallel processing of data. Also, the low power performance is combined with a large number of lags and a high data throughput. The correlator performs 0.5-TMAC operations in 416 lags at a sample rate of 1.28-GSample/s with an input data precision of 1.5-b and a correlation period of one second. The chip is also designed to reduce noise generation by using multiple internal clock phases

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:36 ,  Issue: 2 )