Efficient design and synthesis of decimation filters for wideband delta-sigma ADCs

Abstract

Abstract-A design methodology for synthesizing poweroptimized decimation filters for wideband Delta Sigma ( Σ ) analog-to-digital converters (ADCs) for next-generation wireless standards is presented. The decimation filter is designed to filter the out-of-band quantization noise from a fifth-order continuoustime Σ modulator, with 20 MHz signal bandwidth and 14-bits resolution. The modulator employs an oversampling ratio (OSR) of 16 with a clock rate of 640 MHz. Retiming, pipelining, Canonical Signed Digits (CSD) encoding has been utilized along with an optimized halfband filter to realize the power savings in the overall decimation filter. A process flow to rapidly design the optimized filters in MATLAB, generate the hardware description language (HDL) code and then automatically synthesize the design using standard cells has been presented. The decimation filter is implemented using standard cells in a 45nm CMOS technology occupies a layout area of 0.12 mm 2 and consumes 8 mW power from the 1.1V supply.

Heuristic Generation of Multispectral Labeled Point Cloud Datasets for Deep Learning Models

“…Automatic point cloud labelling to subtract environment features such as trees, road components, … is a challenging task because it does not require hand-crafted features, which are widely used in existing methods like Koppula (2011), Yo koyama (2013) and Song et al (2014). Point cloud labelling is an important task in computer vision and object recognition (Jing Huang et al, 2016).…”

Design and Implementation of Decimation Filter for 13-bit Sigma-Delta ADC Based on FPGA

“…Analog-to-digital converters are categorized into two types namely Nyquist rate converters and oversampling converters depending on the sampling rate. Sigma-delta ADCs come in oversampling converters group [3,4].…”

“…The modulator samples the input signal at an oversampling rate, generating a one bit output stream and decimator is a digital filter or down sampler where the actual digital signal processing is done [6]. The modulator can be realized using analog technique to produce a single bit stream and a digital Decimation filter to achieve a multi bit digital output thus completing the process of analog to digital conversion [4,6].…”