VERSATILE UNIVERSAL CURRENT-MODE AND TRANSRESISTANCE-MODE BIQUADRATIC FILTER USING TWO MOCCIIS AND GROUNDED PASSIVE COMPONENTS

2013 ◽  
Vol 22 (01) ◽  
pp. 1250077 ◽  
Author(s):  
CHEN-NONG LEE
Keyword(s):  
Current Mode ◽  
Current Conveyors ◽  
Passive Components ◽  
Current Output ◽  
Output Terminal ◽  
Biquad Filter ◽  
Voltage Output ◽  
Input Signals ◽  
Biquadratic Filter ◽  
High Output Impedance

This paper presents a versatile universal current-mode and transresistance-mode biquadratic filter using only two multiple outputs second-generation current conveyors (MOCCIIs), two grounded capacitors, and three grounded resistors. The proposed configuration can realize all five standard filtering functions from one current-output terminal and one voltage-output terminal, and also provide all these filtering functions from different current-output and voltage-output terminals without changing the filter topology. Moreover, the proposed biquad filter still achieves many advantages like the employment of all grounded passive components, and the minimum number of active component counts, in addition to having no need of inverting-type input signals or double-type input signals for the use of special input signals, high output impedance and low sensitivity performance. H-Spice simulation results confirm the theory.

THREE-INPUTS-ONE-OUTPUT CURRENT-MODE UNIVERSAL BIQUAD USING TWO CURRENT CONVEYORS

2013 ◽  
Vol 22 (09) ◽  
pp. 1340001 ◽  
Author(s):  
JIUN-WEI HORNG ◽  
TO-YAO CHIU ◽  
CHING-PAO HSIAO ◽  
GUANG-TING HUANG
Keyword(s):  
Integrated Circuit ◽  
Current Mode ◽  
Current Conveyors ◽  
Output Terminal ◽  
Biquadratic Filter ◽  
Component Matching ◽  
High Output Impedance ◽  
Very High ◽  
A Current ◽  
High Output

A current-mode universal biquadratic filter with three input terminals and one output terminal is presented. The architecture uses two current conveyors (CCs), two grounded capacitors and two grounded resistors; and can realize all standard second-order filter functions — highpass, bandpass, lowpass, notch and allpass. Moreover, the circuit still offers the following advantage features: very low active and passive sensitivities, using of grounded capacitors and resistors which is ideal for integrated circuit implementation, without requirements for critical component matching conditions and very high output impedance. The workability of the proposed circuit has been verified via HSPICE simulations using TSMC 0.18 μm, level 49 MOSFET technology.

scholarly journals Versatile Tunable Current-Mode Universal Biquadratic Filter Using MO-DVCCs and MOSFET-Based Electronic Resistors

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Hua-Pin Chen
Keyword(s):  
Current Mode ◽  
Angular Frequency ◽  
Input Current ◽  
Current Conveyors ◽  
Output Impedance ◽  
Output Circuit ◽  
Single Output ◽  
Biquadratic Filter ◽  
High Output Impedance ◽  
High Output

This paper presents a versatile tunable current-mode universal biquadratic filter with four-input and three-output employing only two multioutput differential voltage current conveyors (MO-DVCCs), two grounded capacitors, and a well-known method for replacement of three grounded resistors by MOSFET-based electronic resistors. The proposed configuration exhibits high-output impedance which is important for easy cascading in the current-mode operations. The proposed circuit can be used as either a two-input three-output circuit or a three-input single-output circuit. In the operation of two-input three-output circuit, the bandpass, highpass, and bandreject filtering responses can be realized simultaneously while the allpass filtering response can be easily obtained by connecting appropriated output current directly without using additional stages. In the operation of three-input single-output circuit, all five generic filtering functions can be easily realized by selecting different three-input current signals. The filter permits orthogonal controllability of the quality factor and resonance angular frequency, and no inverting-type input current signals are imposed. All the passive and active sensitivities are low. Postlayout simulations were carried out to verify the functionality of the design.

FULLY CASCADABLE MIXED-MODE UNIVERSAL FILTER BIQUAD USING DDCCS AND GROUNDED PASSIVE COMPONENTS

2011 ◽  
Vol 20 (04) ◽  
pp. 607-620 ◽  
Author(s):  
CHEN-NONG LEE
Keyword(s):  
Mixed Mode ◽  
Current Conveyors ◽  
Output Impedance ◽  
Universal Filter ◽  
Spice Simulation ◽  
Passive Components ◽  
Current Output ◽  
Current Voltage ◽  
Input Signals ◽  
Analytical Synthesis

A fully cascadable (i.e., low/high input impedance for current/voltage input signals and high/low output impedance for current/voltage output signals) mixed-mode (input and output signals can be voltage or current) universal filter biquad by using three differential difference current conveyors (DDCCs), three grounded resistors, and two grounded capacitors is presented in this paper. The proposed biquad can realize the inverting, non-inverting, and differential types universal filtering responses (lowpass, highpass, bandpass, notch, and allpass) from the voltage and current output terminals without changing the filter topology. The proposed circuit is suitable for cascading in all the four possible modes (i.e., voltage, current, transresistance, and transconductance modes). Moreover, the proposed mixed-mode biquad still enjoys (i) using only grounded passive components, (ii) no need of extra inverting and non-inverting amplifiers for special input signals, and (iii) low active and passive sensitivities. This paper also shows how analytical synthesis can be used to produce the proposed mixed-mode filter circuit. H-Spice simulation results confirm the theory.

ALL GROUNDED PASSIVE ELEMENTS CURRENT-MODE ALL-PASS FILTER

2009 ◽  
Vol 18 (01) ◽  
pp. 31-43 ◽  
Author(s):  
SHAHRAM MINAEI ◽  
ERKAN YUCE
Keyword(s):  
Current Mode ◽  
Current Conveyors ◽  
Output Impedance ◽  
Spice Simulation ◽  
Passive Components ◽  
Pass Filter ◽  
Variable Voltage ◽  
Minimum Number ◽  
High Output Impedance ◽  
High Output

In this paper, a new current-mode (CM) all-pass filter employing two Dual-Output Second-Generation Current Conveyors (DO–CCIIs), one grounded resistor and one grounded capacitor is presented. The proposed circuit exhibits low input impedance and high output impedance, which makes it suitable for cascading. Moreover, adding two extra resistors to the proposed circuit, a new gain-variable voltage-mode (VM) all-pass filter is obtained. A quadrature oscillator employing minimum number of grounded passive components is derived from the developed CM filter as an application of the first-order all-pass filter. Both of the proposed all-pass filters do not require matching of passive components. The effects of the parasitic impedances of the DO–CCIIs on the transfer function (TF) of the proposed CM filter as an example are investigated. In addition, the proposed CM all-pass filter and oscillator circuit are simulated using SPICE simulation program to confirm the theory.

ELECTRONICALLY TUNABLE CURRENT-MODE UNIVERSAL BIQUAD FILTER USING DUAL-X CURRENT CONVEYORS

2009 ◽  
Vol 18 (04) ◽  
pp. 665-680 ◽  
Author(s):  
SHAHRAM MINAEI
Keyword(s):  
Current Mode ◽  
Current Conveyors ◽  
Biquad Filter ◽  
Low Pass ◽  
Band Pass ◽  
High Output Impedance ◽  
Electronically Tunable ◽  
High Pass ◽  
Theoretical Analyses ◽  
High Output

In this paper, an electronically tunable current-mode (CM) universal biquad filter is proposed. The proposed filter employs three dual-X second-generation current conveyors (DXCCIIs), two grounded capacitors and four NMOS transistors acting as resistors. The proposed filter simultaneously realizes standard filter functions such as low-pass (LP), band-pass (BP), and high-pass (HP) responses. The notch (NH) and all-pass (AP) functions can also be obtained by connecting appropriate output currents directly without using additional active elements. The output signals are obtained at high output impedance terminals, which is important for easy cascading in CM operation. SPICE simulation results are given to verify the theoretical analyses.

New electronically tunable current-mode universal biquad filter using translinear current conveyors

2010 ◽  
Vol 97 (5) ◽  
pp. 511-523 ◽  
Author(s):  
Montree Kumngern ◽  
Wirote Jongchanachavawat ◽  
Kobchai Dejhan
Keyword(s):  
Current Mode ◽  
Current Conveyors ◽  
Biquad Filter ◽  
Electronically Tunable

scholarly journals Novel Current-Conveyor-Based Universal Current-Mode Biquad Filter with Three Inputs and One Output

1998 ◽  
Vol 20 (4) ◽  
pp. 235-240 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Hussain Abdullah Al-Zaher
Keyword(s):  
Second Generation ◽  
Current Mode ◽  
Current Conveyor ◽  
Current Conveyors ◽  
Independent Control ◽  
Biquad Filter

A novel universal current-mode filter with three inputs and one high imedance output is presented. The proposed circuit uses four plus-type second-generation current-conveyors, grounded resistors and grounded capacitors. The proposed circuit enjoys low active and passive sensitivities and independent control of the parametersω0/Q0using grounded resistors.

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