scholarly journals Combination of HP and LP filters for narrow band antialiasing filter

2021 ◽  
Vol 72 (4) ◽  
pp. 283-286
Author(s):  
Bohumil Brtník
Keyword(s):  
Signal Processing ◽  
Discrete Time ◽  
Operational Amplifier ◽  
Narrow Band ◽  
Time Signal ◽  
Spice Simulation ◽  
Output Resistance ◽  
High Frequencies ◽  
Filter Structure ◽  
Reconstruction Filter

Abstract The discrete time signal processing requires an anti-aliasing filter at the input and a reconstruction filter at output. Some filters of biquads structure are characterized by a decreasing of the attenuation at high frequencies, caused by the final value of the output resistance of the operational amplifier. In this paper we discuss a design of combined BP filter without mentioned decrease. The proposed filter structure was verified by SPICE simulation.

scholarly journals Comparison of Huelsmann Basic Biquad with View to the Decrease of the Attenuation over the Transient Frequency of the Operational Amplifier

2021 ◽  
Vol 19 ◽  
Keyword(s):  
Signal Processing ◽  
Discrete Time ◽  
Operational Amplifier ◽  
Circuit Simulator ◽  
Low Pass ◽  
Reconstruction Filter ◽  
Feedback Structure ◽  
Band Pass

The signal processing at discrete time requires an aliasing filter at the input and a reconstruction filter at its output. In this paper, selected basic structures of biquads are described and compared with a view to the decrease of the attenuation over the transient frequency of the operational amplifier. Concretely, low-pass and band-pass Huelsman (i.e. multi feedback) structure are confronted with the limits of a real operational amplifier. Firstly, the reasons of the decreasing of the attenuation are explained theoretically. Secondly, these conclusions are verified by simulations. These simulations were performed by spice-like circuit simulator MicroCap version 10.

Discrete-time signal processing

2017 ◽  
pp. 1-45
Author(s):  
Alexander D. Poularikas ◽  
Zayed M. Ramadan
Keyword(s):  
Signal Processing ◽  
Discrete Time ◽  
Time Signal

Discrete-Time Signal Processing with DNA

2013 ◽  
Vol 2 (5) ◽  
pp. 245-254 ◽  
Author(s):  
Hua Jiang ◽  
Sayed Ahmad Salehi ◽  
Marc D. Riedel ◽  
Keshab K. Parhi
Keyword(s):  
Signal Processing ◽  
Discrete Time ◽  
Time Signal
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