Synthesis of Nonlinear Analog Functions

2017 ◽  
Vol 27 (03) ◽  
pp. 1850040 ◽  
Author(s):  
Mousumi Bhanja ◽  
Baidyanath Ray
Keyword(s):  
Current Mode ◽  
Nonlinear Functions ◽  
Spice Simulation ◽  
Essential Requirement ◽  
Analog Synthesis ◽  
Transconductance Amplifier ◽  
Polynomial Expression ◽  
Polynomial Series ◽  
Synthesis Methodology ◽  
Nonlinear Analog

In this paper, a systematic and hierarchical synthesis methodology is presented for nonlinear analog synthesis to meet the essential requirement for system automation. Behavior of nonlinear system, represented by polynomial expression, has been studied by decomposing it into linear and nonlinear sub-expression. Such sub-expressions are realized with basic building block like multiplier, adder, quadratic, etc., each of which can be represented as a network of the current mode device, operational transconductance amplifier (OTA). Polynomial series is used to represent various important functions in signal processing applications. Few nonlinear functions with their OTA representation are discussed as the applications of polynomial series. The response of all the circuits are studied through SPICE simulation validating the proposed methodology.

Modified current differencing transconductance amplifier – new versatile active element

2012 ◽  
Vol 60 (4) ◽  
pp. 739-750 ◽  
Author(s):  
A. Malcher
Keyword(s):  
Signal Processing ◽  
Active Element ◽  
Current Mode ◽  
Input Resistance ◽  
Analog Signal ◽  
Output Stage ◽  
Spice Simulation ◽  
Transconductance Amplifier ◽  
Simulation Results ◽  
Current Differencing Transconductance Amplifier

Abstract This paper introduces a new current mode component called Modified Current Differencing Transconductance Amplifier (MCDTA). Important parameters of the circuit i.e. input resistance, z terminal resistance and transconductance of the output stage can be tuned electrically. The circuit can be implemented in linear and non-linear analog signal processing. The paper presents an example of the MCDTA application - a complete quadrature oscillator with the amplitude regulation. The functionality of the example circuit and its tuning capability were proved by the SPICE simulation results.

scholarly journals VM and CM Universal Filters Based on Single DVCCTA

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Neeta Pandey ◽  
Sajal K. Paul
Keyword(s):  
Building Block ◽  
Current Mode ◽  
Cmos Technology ◽  
Current Conveyor ◽  
Spice Simulation ◽  
Transconductance Amplifier ◽  
Low Sensitivity ◽  
Differential Voltage Current Conveyor ◽  
A Current ◽  
Sensitivity Performance

A universal voltage-mode filter (VM) and a current-mode filter (CM) based on recently proposed active building block, namely, differential voltage current conveyor transconductance amplifier (DVCCTA) are proposed. Both the circuits use a single DVCCTA, two capacitors, and a single resistor. The filters enjoy low-sensitivity performance and low component spread and exhibit electronic tunability of filter parameters via bias currents of DVCCTA. SPICE simulation using 0.25 μm TSMC CMOS technology parameters is included to show the workability of the proposed circuits.

scholarly journals Single CDTA-Based Current Mode All-Pass Filter and Its Applications

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Neeta Pandey ◽  
Sajal K. Paul
Keyword(s):  
Input Impedance ◽  
Current Mode ◽  
Cmos Technology ◽  
Band Pass Filter ◽  
Output Impedance ◽  
Spice Simulation ◽  
Pass Filter ◽  
Transconductance Amplifier ◽  
Band Pass ◽  
Current Difference

This paper presents a single current difference transconductance amplifier (CDTA) based all-pass current mode filter. The proposed configuration makes use of a grounded capacitor which makes it suitable for IC implementation. Its input impedance is low and output impedance is high, hence suitable for cascading. The circuit does not use any matching constraint. The nonideality analysis of the circuit is also given. Two applications, namely, a quadrature oscillator and a highQband pass filter are developed with the proposed circuit. The functionality of the circuit is verified with SPICE simulation using 0.35 μm TSMC CMOS technology parameters.

scholarly journals Current Mode Full-Wave Rectifier Based on a Single MZC-CDTA

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Neeta Pandey ◽  
Rajeshwari Pandey
Keyword(s):  
Current Mode ◽  
Cmos Technology ◽  
Spice Simulation ◽  
Full Wave ◽  
Transconductance Amplifier ◽  
Current Difference ◽  
A Current

This paper presents a current mode full-wave rectifier based on single modified Z copy current difference transconductance amplifier (MZC-CDTA) and two switches. The circuit is simple and is suitable for IC implementation. The functionality of the circuit is verified with SPICE simulation using 0.35 μm TSMC CMOS technology parameters.

scholarly journals Analog Low-Voltage Current-Mode Implementation of Digital Logic Gates

2003 ◽  
Vol 26 (2) ◽  
pp. 111-114 ◽  
Author(s):  
Muhammad Taher Abuelma'atti
Keyword(s):  
Power Series ◽  
Low Voltage ◽  
Logic Gates ◽  
Current Mode ◽  
New Technique ◽  
Basic Logic ◽  
Spice Simulation ◽  
Simulation Results ◽  
A New Technique ◽  
Logic Functions

In this letter a new technique is introduced for implementing the basic logic functions using analog current-mode techniques. By expanding the logic functions in power series expressions, and using summers and multipliers, realization of the basic logic functions is simplified. Since no transistors are working in saturation, the problem of fan-out is alleviated. To illustrate the proposed technique, a circuit for simultaneous realization of the logic functions NOT, OR, NAND and XOR is considered. SPICE simulation results, obtained with 3 V supply, are included

scholarly journals A Flux Controlled Memristor using 90nm Technology

2021 ◽  
pp. 1-6
Author(s):  
B.T. Krishna ◽  
◽  
Shaik. mohaseena Salma ◽  
Keyword(s):  
Power Supply ◽  
Power Dissipation ◽  
Power Efficiency ◽  
Current Mode ◽  
Cmos Technology ◽  
Theoretical Simulation ◽  
Transconductance Amplifier ◽  
Higher Power ◽  
Static Power ◽  
A Current

A flux-controlled memristor using complementary metal–oxide–(CMOS) structure is presented in this study. The proposed circuit provides higher power efficiency, less static power dissipation, lesser area, and can also reduce the power supply by using CMOS 90nm technology. The circuit is implemented based on the use of a second-generation current conveyor circuit (CCII) and operational transconductance amplifier (OTA) with few passive elements. The proposed circuit uses a current-mode approach which improves the high frequency performance. The reduction of a power supply is a crucial aspect to decrease the power consumption in VLSI. An offered emulator in this proposed circuit is made to operate incremental and decremental configurations well up to 26.3 MHZ in cadence virtuoso platform gpdk using 90nm CMOS technology. proposed memristor circuit has very little static power dissipation when operating with ±1V supply. Transient analysis, memductance analysis, and dc analysis simulations are verified practically with the Experimental demonstration by using ideal memristor made up of ICs AD844AN and CA3080, using multisim which exhibits theoretical simulation are verified and discussed.

scholarly journals Gm-Realization of Controlled-Gain Current Follower Transconductance Amplifier

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Worapong Tangsrirat
Keyword(s):  
Current Mode ◽  
Cmos Technology ◽  
Current Transfer ◽  
Biquad Filter ◽  
Transconductance Amplifier ◽  
Current Follower ◽  
Dc Bias ◽  
Simulation Results ◽  
Supply Voltages ◽  
A Current

This paper describes the conception of the current follower transconductance amplifier (CFTA) with electronically and linearly current tunable. The newly modified element is realized based on the use of transconductance cells (Gms) as core circuits. The advantage of this element is that the current transfer ratios (iz/ipandix/iz) can be tuned electronically and linearly by adjusting external DC bias currents. The circuit is designed and analyzed in 0.35 μm TSMC CMOS technology. Simulation results for the circuit with ±1.25 V supply voltages show that it consumes only 0.43 mw quiescent power with 70 MHz bandwidth. As an application example, a current-mode KHN biquad filter is designed and simulated.

Improved Electronically-Tunable Current-Mode Square-Root-Domain First-Order Multifunction Filter

2021 ◽  
pp. 2150190
Author(s):  
Manoj Kumar Jain
Keyword(s):  
Transient Response ◽  
Current Mode ◽  
Square Root ◽  
Spice Simulation ◽  
First Order ◽  
Low Pass ◽  
Multifunction Filter ◽  
Simulation Results ◽  
Electronically Tunable ◽  
High Pass

Some time back, Kircay reported an electronically-tunable current-mode square-root-domain first-order filter capable of realizing low-pass (LP), high-pass (HP) and all-pass (AP) filter functions. When simulated in SPICE, Kircay’s circuit has been found to exhibit DC offsets in case of LP and AP responses and incorrect transient response in case of HP response. In this paper, an improved circuit overcoming these difficulties/deficiencies has been suggested and its workability of the improved circuit as well as its capability in meeting the intended objectives has been demonstrated by SPICE simulation results.

Sign in / Sign up

Export Citation Format

Share Document