First-Order Current-Mode Fully Cascadable All-Pass Frequency Selective Structure, Its Higher-Order Extension and Tunable Transformation Possibilities

2021 ◽  
pp. 2250030
Author(s):  
Bhartendu Chaturvedi ◽  
Jitendra Mohan ◽  
Jitender
Keyword(s):  
Current Mode ◽  
Matching Condition ◽  
Quality Performance ◽  
Passive Components ◽  
First Order ◽  
Component Matching ◽  
Frequency Selective ◽  
High Output Impedance ◽  
Theoretical Analyses ◽  
High Output

An extra-X second-generation current conveyor (EXCCII) based first-order current-mode all-pass frequency selective structure is presented through this paper. A grounded resistor and a grounded capacitor are used as passive components. Single active element based realization directly correlates with the circuit’s simplicity. The grounded nature of passive components is advantageous from IC fabrication aspects. The proposed circuit offers cascadability support through low input impedance and high output impedance. The ability of the presented idea to deliver the desired output without meeting any stringent component matching condition further simplifies the circuit’s operation. Sensitivity performance of the proposed circuit is good. The quality performance at high frequency is another value addition to the circuit’s signal processing attributes. Analyses showing the circuit’s behavior under non-ideal conditions are also described in detail. Validation of theoretical analyses is supported by simulations carried out on PSPICE at 0.25[Formula: see text][Formula: see text]m technology.

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.

High output impedance current-mode first-order allpass networks with four grounded components and two CCIIs

2006 ◽  
Vol 93 (9) ◽  
pp. 613-621 ◽  
Author(s):  
J.-W. Horng ◽  
C.-L. Hou ◽  
C.-M. Chang ◽  
W.-Y. Chung ◽  
H.-L. Liu ◽  
...  
Keyword(s):  
Current Mode ◽  
Output Impedance ◽  
First Order ◽  
High Output Impedance ◽  
High Output

GROUNDED CAPACITOR CM-APS WITH HIGH OUTPUT IMPEDANCE

2007 ◽  
Vol 16 (04) ◽  
pp. 567-576 ◽  
Author(s):  
SUDHANSHU MAHESHWARI
Keyword(s):  
Current Mode ◽  
Bias Current ◽  
Output Impedance ◽  
Quadrature Oscillator ◽  
Pspice Simulations ◽  
First Order ◽  
External Bias ◽  
High Output Impedance ◽  
High Output

This paper presents a new first order current mode all-pass section (CM-APS) with a grounded capacitor and employing a modified current controlled conveyor. The new circuit with high output impedance is ideal for current-mode cascading and is tunable through an external bias current. The proposed circuit is unique due to its features, not exhibited by any of the available works on the topic. An application of the circuit in realizing a quadrature oscillator is also given. The theory is validated through PSPICE simulations using real device transistors.

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.

CCCIIs-Based First-Order All-Pass Filter and Quadrature Oscillators

2017 ◽  
Vol 26 (06) ◽  
pp. 1750094 ◽  
Author(s):  
Phatsagul Thitimahatthanagusol ◽  
Charinsak Saetiaw ◽  
Thanaset Thosdeekoraphat ◽  
Chanchai Thongsopa ◽  
Saksit Summart
Keyword(s):  
Integrated Circuit ◽  
Current Mode ◽  
Pass Filter ◽  
First Order ◽  
Condition Of Oscillation ◽  
High Output Impedance ◽  
Quadrature Signals ◽  
Quadrature Oscillators ◽  
A Current ◽  
High Output

This paper introduces a current-mode first-order all-pass filter (APF) and its application in quadrature oscillator (QO) based on CCCII. The proposed filter can provide inverting and noninverting all-pass functions with a same circuit topology, it uses two CCCIIs and one grounded capacitor. Moreover, the first-order all-pass filter was applied in current-mode sinusoidal quadrature oscillators with the design based on block diagrams. The introduced oscillators can provide four phase-quadrature signals which independently control the condition of oscillation (CO) and frequency of oscillation (FO). The proposed oscillators consist of three CCCIIs and two grounded capacitors. The proposed APF and QOs have high output impedance which can directly drive load without additional current buffer. In addition, they use only grounded capacitors which are very appropriate to future development into an integrated circuit. The results of PSPICE simulation program correspond to the theoretical analysis.

scholarly journals Low Input and High Output Impedances Current-Mode First-Order Allpass Filter Employing Grounded Passive Components

2012 ◽  
Vol 03 (02) ◽  
pp. 176-179 ◽  
Author(s):  
Jiun-Wei Horng ◽  
Chun-Li Hou ◽  
Yi-Sing Guo ◽  
Chih-Hou Hsu ◽  
Dun-Yih Yang ◽  
...  
Keyword(s):  
Current Mode ◽  
Passive Components ◽  
Low Input ◽  
First Order ◽  
Allpass Filter ◽  
High Output

High Output Impedance Current-Mode Universal First-Order Filter With Three Inputs Using One DDCC

2019 ◽  
Vol 12 (3) ◽  
pp. 242-246 ◽  
Author(s):  
Jiun-Wei Horng
Keyword(s):  
Transfer Functions ◽  
Current Mode ◽  
Output Impedance ◽  
Filter Function ◽  
First Order ◽  
Output Terminal ◽  
Order Filter ◽  
High Output Impedance ◽  
A Current ◽  
High Output

Background: A current-mode universal first-order filter with three input terminals and one output terminal is presented. Methods: The proposed circuit uses one differential difference current conveyor (DDCC), one grounded capacitor and two resistors. Results: This circuit offers the following advantageous features: high output impedance, employing only one active component, using a grounded capacitor, the versatility to synthesize any type of first-order filter transfer functions. Conclusion: Each standard first-order filter function can be obtained by using only one current input signal from the proposed circuit.

Current-Mode First-Order Universal Filter and its Voltage-Mode Transformation

2019 ◽  
Vol 29 (09) ◽  
pp. 2050149 ◽  
Author(s):  
Bhartendu Chaturvedi ◽  
Jitendra Mohan ◽  
Atul Kumar ◽  
Kirat Pal
Keyword(s):  
Integrated Circuit ◽  
Current Mode ◽  
Matching Condition ◽  
Universal Filter ◽  
Circuit Realization ◽  
Passive Components ◽  
Mode Transformation ◽  
First Order ◽  
Voltage Mode ◽  
Circuit Technology

This paper deals with the realization of current-mode first-order universal filter based on multiple output second generation current conveyor (MO-CCII). Two MO-CCIIs, one resistor and one capacitor are used in the circuit realization. The proposed work includes additional features such as ease of cascadability, easily implementable in modern integrated circuit technology and no requirement of passive components matching condition. The additional beauty of the proposed filter structure is that all three responses can also be realized by interchanging the positions of passive components as well. Moreover, a possible transformation of the proposed current-mode type universal filter into a voltage-mode type universal filter using network transpose method is also explored. The possibility of mode transformation further expands the scope of proposed idea. The theoretical aspects are verified using cadence VIRTUOSO simulation results.

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