Tracking properties of a gradient-based second-order adaptive IIR notch filter with constrained poles and zeros

2002 ◽  
Vol 50 (4) ◽  
pp. 878-888 ◽  
Author(s):  
Yegui Xiao ◽  
Y. Takeshita ◽  
K. Shida
Keyword(s):  
Notch Filter ◽  
Second Order ◽  
Gradient Based ◽  
Poles And Zeros

Unbiased plain gradient algorithm for a second-order adaptive IIR notch filter with constrained poles and zeros

2010 ◽  
Vol 90 (8) ◽  
pp. 2513-2520 ◽  
Author(s):  
W. Loetwassana ◽  
R. Punchalard ◽  
J. Koseeyaporn ◽  
P. Wardkein
Keyword(s):  
Notch Filter ◽  
Second Order ◽  
Gradient Algorithm ◽  
Poles And Zeros

Arctangent Gradient Based Adaptive Algorithm for a Second-Order Adaptive IIR Notch Filter

2015 ◽  
Vol 781 ◽  
pp. 535-538
Author(s):  
Rachu Punchalard
Keyword(s):  
Adaptive Algorithm ◽  
Unbiased Estimator ◽  
Frequency Estimation ◽  
Notch Filter ◽  
Second Order ◽  
Filter Parameter ◽  
Adaptive Notch Filter ◽  
Slow Adaptation ◽  
Gradient Based

Frequency estimation based on adaptive notch filter is very attractive due to simplicity and economy. This paper presents an arctangent gradient (AG) based adaptive algorithm for a second-order constrained adaptive IIR notch filter (ANF). The motivation is to use an arctangent value of the gradient signal to adjust the filter parameter. It is revealed that for slow adaptation, the AG can be considered as an unbiased estimator. The quantitative simulations have been conducted to support the superior of the proposed AG algorithm.

scholarly journals Novel Grounded Capacitor All-Pass and Notch Filters Using Current Conveyors and Differential Amplifier

2003 ◽  
Vol 26 (3) ◽  
pp. 167-170 ◽  
Author(s):  
R. Saraswat ◽  
K. Pal ◽  
S. Rana
Keyword(s):  
Input Impedance ◽  
Transfer Functions ◽  
Notch Filter ◽  
Second Order ◽  
Differential Amplifier ◽  
Current Conveyors ◽  
Output Impedance ◽  
High Input ◽  
Notch Filters ◽  
High Input Impedance

Three circuits each realizing second-order all-pass/notch filter transfer functions are reported. All circuits use grounded capacitors and are suitable for IC implementation. These circuits offer the advantages of high input impedance and low output impedance and are superior to all earlier realisations.

scholarly journals New Current-Mode Notch and Allpass Filters with Single Current Difference Amplifier

1996 ◽  
Vol 19 (1) ◽  
pp. 25-32 ◽  
Author(s):  
Muhammad Taher Abuelma'atti
Keyword(s):  
Notch Filter ◽  
Current Mode ◽  
Second Order ◽  
Experimental Results ◽  
Allpass Filters ◽  
Current Difference

A new configuration for realization of current-mode notch and allpass filters is presented. It can synthesize second-order notch and allpass filters using a single current difference (Norton) amplifier and at most eight passive RC one port elements. Experimental results obtained from a notch filter realization are presented.

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