Design of new selective CIC filter functions with passband‐droop compensation

2016 ◽  
Vol 52 (2) ◽  
pp. 115-117 ◽  
Author(s):  
B.P. Stošić ◽  
V.D. Pavlović
Keyword(s):  
Cic Filter ◽  
Passband Droop

scholarly journals Sampling Rate Optimization for Improving the Cascaded Integrator Comb Filter Characteristics

2021 ◽  
Vol 38 (1) ◽  
pp. 97-103
Author(s):  
Raouf Amrane ◽  
Youcef Brik ◽  
Samir Zeghlache ◽  
Mohamed Ladjal ◽  
Djamel Chicouche
Keyword(s):  
Signal Processing ◽  
Finite Impulse Response ◽  
Sampling Rate ◽  
Comb Filter ◽  
Existing Structures ◽  
High Sampling Rate ◽  
Cic Filter ◽  
Stopband Attenuation ◽  
Rate Optimization ◽  
Passband Droop

The cascaded integrator comb (CIC) filters are characterized by coefficient less and reduced hardware requirement, which make them an economical finite impulse response (FIR) class in many signal processing applications. They consist of an integrator section working at the high sampling rate and a comb section working at the low sampling rate. However, they don’t have well defined frequency response. To remedy this problem, several structures have been proposed but the performance is still unsatisfactory. Thence, this paper deals with the improvement of the CIC filter characteristics by optimizing its sampling rate. This solution increases the performance characteristics of CIC filters by improving the stopband attenuation and ripple as well as the passband droop. Also, this paper presents a comparison of the proposed method with some other existing structures such as the conventional CIC, the sharpened CIC, and the modified sharpened CIC filters, which has proven the effectiveness of the proposed method.

scholarly journals A Sigma-Delta ADC for Signal Conditioning IC of Automotive Piezo-Resistive Pressure Sensors with over 80 dB SNR

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4199 ◽  
Author(s):  
Behnam Samadpoor Rikan ◽  
Sang-Yun Kim ◽  
Nabeel Ahmad ◽  
Hamed Abbasizadeh ◽  
Muhammad Riaz Ur Rehman ◽  
...  
Keyword(s):  
Input Signal ◽  
Flicker Noise ◽  
Signal To Noise Ratio ◽  
Pressure Sensors ◽  
High Gain ◽  
Cmos Process ◽  
Signal Conditioning ◽  
Sigma Delta ◽  
Cic Filter ◽  
Decimation Filter

This paper presents a second-order discrete-time Sigma-Delta (SD) Analog-to-Digital Converter (ADC) with over 80 dB Signal to Noise Ratio (SNR), which is applied in a signal conditioning IC for automotive piezo-resistive pressure sensors. To reduce the flicker noise of the structure, choppers are used in every stage of the high gain amplifiers. Besides, to reduce the required area and power, only the CIC filter structure is adopted as a decimation filter. This filter has a configurable structure that can be applied to different data rates and input signal bandwidths. The proposed ADC was fabricated and measured in a 0.18-µm CMOS process. Due to the application of only a CIC filter, the total active area of the SD-ADC and reference generator is 0.49 mm2 where the area of the decimation filter is only 0.075 mm2. For the input signal bandwidth of 1.22 kHz, it achieved over 80 dB SNR in a 2.5 MHz sampling frequency while consuming 646 µW power.

scholarly journals Efficient sharpening CIC filter embedding fifth-order filter with coefficient optimisation algorithm

2020 ◽  
Vol 56 (23) ◽  
pp. 1241-1243
Author(s):  
Lin Zhibin ◽  
Gao Bo ◽  
Yin Ruotong ◽  
Gong Min
Keyword(s):  
Optimisation Algorithm ◽  
Order Filter ◽  
Cic Filter ◽  
Fifth Order

Comb Filters Characteristics and Current Applications

2018 ◽  
pp. 6007-6018
Author(s):  
Miriam Guadalupe Cruz-Jimenez ◽  
David Ernesto Troncoso Romero ◽  
Gordana Jovanovic Dolecek
Keyword(s):  
Comb Filter ◽  
Digital Audio ◽  
Linear Phase ◽  
Phase Filter ◽  
Comb Filters ◽  
Passband Droop

The comb filter is a very popular linear-phase filter due its simplicity, i.e. all its coefficients are equal to unity. As a consequence, it does not require multipliers or coefficients storage. This characteristic makes this filter attractive for many applications, as for example, in decimation, communications, digital audio, among others. However, the comb filter presents passband droop and a poor attenuation in the stopband region. In this proposal, the comb filter characteristics are reviewed and illustrated with one example. Additionally, the selected methods commonly used to improve the magnitude characteristics of a comb filter will be described and illustrated with examples.

Efficient digital IF architecture for wideband OFDM systems based on CIC filter

2014 ◽  
Author(s):  
Guixin Xuan ◽  
Yawei Han ◽  
Min Ren ◽  
Zhenyu Zhang ◽  
Fanxin Zeng
Keyword(s):  
Ofdm Systems ◽  
Cic Filter

Design of selective CIC filter functions

2014 ◽  
Vol 68 (12) ◽  
pp. 1231-1233 ◽  
Author(s):  
Biljana P. Stošić ◽  
Vlastimir D. Pavlović
Keyword(s):  
Cic Filter

High-speed sharpening of decimating CIC filter

2004 ◽  
Vol 40 (21) ◽  
pp. 1383 ◽  
Author(s):  
G. Stephen ◽  
R.W. Stewart
Keyword(s):  
High Speed ◽  
Cic Filter

Bifurcate repeated stop-band zeros of CIC filter

2016 ◽  
Author(s):  
Fredric J. Harris ◽  
Gordana Dolecek
Keyword(s):  
Stop Band ◽  
Cic Filter
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