Electronically Tunable High Input Impedance Voltage-Mode Multifunction Filter

2008 ◽  
Vol E91-A (10) ◽  
pp. 3080-3083 ◽  
Author(s):  
H.-P. CHEN ◽  
W.-S. YANG
Keyword(s):  
Input Impedance ◽  
High Input ◽  
High Input Impedance ◽  
Voltage Mode ◽  
Multifunction Filter ◽  
Electronically Tunable

scholarly journals High-Input Impedance Voltage-Mode Multifunction Filter

2021 ◽  
Vol 11 (1) ◽  
pp. 387
Author(s):  
San-Fu Wang ◽  
Hua-Pin Chen ◽  
Yitsen Ku ◽  
Yi-Fang Li
Keyword(s):  
Input Impedance ◽  
Angular Frequency ◽  
High Input ◽  
High Input Impedance ◽  
Current Feedback ◽  
Circuit Performance ◽  
Voltage Mode ◽  
Biquad Filter ◽  
Low Pass ◽  
Multifunction Filter

This paper proposes a high-input impedance voltage-mode (VM) multifunction biquad filter which employs three current-feedback amplifiers (CFAs), three resistors, and two grounded capacitors. The proposed VM multifunction biquad filter has single-input and triple-output and can realize non-inverting low-pass (NLP), inverting band-pass (IBP), and non-inverting band-stop (NBS) voltage responses at the same time without increasing component selection. The proposed VM multifunction biquad filter enjoys the orthogonal tunability of angular frequency and quality factor and also provides the advantage of using only two grounded capacitors, high-input impedance and low active/passive sensitivity. The performance of the proposed VM multifunction biquad filter is verified through its hardware implementation and OrCAD PSpice simulation based on AD844-type CFAs. The circuit analysis, sensitivity analysis, and NLP, IBP, and NBS voltage responses are also shown in this paper. The paper presents a method to effectively reduce the active and passive components, maintain good circuit performance, and reduce circuit costs.

scholarly journals High-Input Impedance Voltage-Mode Multifunction Filter with Four Grounded Components and Only Two Plus-Type DDCCs

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Hua-Pin Chen
Keyword(s):  
Input Impedance ◽  
Current Conveyors ◽  
High Input ◽  
High Input Impedance ◽  
Voltage Mode ◽  
Biquadratic Filter ◽  
Multifunction Filter ◽  
Component Matching ◽  
Single Input ◽  
Passive Sensitivity

This paper introduces a novel voltage-mode multifunction biquadratic filter with single input and four outputs using two plus-type differential difference current conveyors (DDCCs) and four grounded passive components. The filter can realize inverting highpass, inverting bandpass, noninverting lowpass, and noninverting bandpass filter responses, simultaneously. It still maintains the following advantages: (i) using grounded capacitors attractive for integration and absorbing shunt parasitic capacitance, (ii) using grounded resistors at allXterminals of DDCCs suitable for the variations of filter parameters and absorbing series parasitic resistances at allXterminals of DDCCs, (iii) high-input impedance good for cascadability, (iv) no need to change the filter topology, (v) no need to component-matching conditions, (vi) low active and passive sensitivity performances, and (vii) simpler configuration due to the use of plus-type DDCCs only. HSPICE and MATLAB simulations results are provided to demonstrate the theoretical analysis.

scholarly journals Additional High Input Low Output Impedance Analog Networks

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Sudhanshu Maheshwari ◽  
Bhartendu Chaturvedi
Keyword(s):  
Sensitivity Analysis ◽  
Input Impedance ◽  
Second Order ◽  
Current Conveyor ◽  
Output Impedance ◽  
High Input ◽  
High Input Impedance ◽  
Pspice Simulations ◽  
Voltage Mode ◽  
Good Agreement

This paper presents some additional high input low output impedance analog networks realized using a recently introduced single Dual-X Current Conveyor with buffered output. The new circuits encompass several all-pass sections of first- and second-order. The voltage-mode proposals benefit from high input impedance and low output impedance. Nonideality and sensitivity analysis is also performed. The circuit performances are depicted through PSPICE simulations, which show good agreement with theory.

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