Σ-ΔADC动态可重构数字抽取滤波器面积优化OA

To meet the increasing demands for high precision and flexibility in communication,radar,and edge computing applications,this paper proposed a dynamically reconfigurable digital decimation filter based on a hybrid LUT-multiplier architecture.The design employed non-uniform coefficient quantization guided by frequency response sensitivity and noise analysis,combined with LUT compression technology to effectively reduce storage and computation overhead.A dynamic reconfiguration mechanism was introduced to realize real-time adjustment of filter coefficients and decimation factors(64,128,512),enabling switching between decimation factors to meet varying bandwidth and performance requirements.The filter consists of a five-stage cascaded integrator-comb(CIC)filter cascaded with a finite impulse response(FIR)compensator,exhibiting highly flexible performance reconfigurability.FPGA validation results showed that the filter could efficiently complete decimation and filtering tasks across multiple bandwidths.Implemented in a 0.18 μm CMOS process,the design underwent logic synthesis and layout design,occupying an area of 0.289 mm2,achieving a peak SNR of about 105 dB and an ENOB of 16.3 bit.Compared with conventional fixed-structure filter schemes,the chip area was reduced by approximately 20%.This dynamically reconfigurable design significantly enhances system adaptability and resource utilization efficiency,making it suitable for high-performance and multi-scenario application requirements.