Search query: Wilson Current Mirrors analysis

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abstract: The MOSFET (Metal Oxide Field Effect Transistor) is one of the most widely used semiconductor devices in analog and digital circuits for amplification and switching. It is a highly popular power de vice used in power electronics. The important advantages of MOSFET include higher efficiency at lower operating voltages; there is no gate current resulting in high input impedance enhancing its switching speeds. A differential amplifier is a direct coupled amplifier that amplifies the difference between the two input signals arriving at its input and suppresses the common voltage between the two inputs. The important parameter that determines the performance of a differential amplifier is its CMRR which determines the capability of it to amplify the differential mode signal and cancel the common mode signal i.e. noise. To improve the CMRR, the resistor RE is replaced by an active load i.e. the current mirror circuit. In this paper, the performance of MOSFET differential amplifier (BiMOS Differential pair) is evaluated using Active MOSFET Load, Wilson Current Mirror and Widlar Current Mirror Circuits. The results of the implementation show that the highest CMRR (31.48 dB) is obtained by using the Diode Connected Topology.
author_names: Gouri Shashank Deo

Jyas Aloke Totlani

Kowshik Eshwar Mamidi

Chaitanya Vijaykumar Mahamuni
title: Performance Analysis of BiMOS Differential Pair with Active Load, Wilson and Widlar Current Mirrors, and Diode Connected Topology
venue: 2020 4th International Conference on Intelligent Computing and Control Systems (ICICCS)
year: 2020

abstract: Digital Object Identifier 10.29292/jics.v15i2.159 Abstract In this paper the performance of different architectures of current mirrors implemented with single SOI transistors and self cascode transistors, both symmetric and asymmetric is evaluated. A comparison of current mirrors figures of merit, looking for the advantages of the asymmetric composite structure in relation to a single SOI MOSFETs and the symmetric self cascode transistor is performed. This analysis has been carried out through analytical simulations, using common source, Cascode and Wilson current mirrors architectures. It is shown that asymmetric configuration can provide larger output resistance even in the common source current mirror than other architectures with conventional single transistors.
author_names: Paulo Rodrigues da Silva

Michelly de Souza
title: Analysis of Current Mirrors with Asymmetric Self Cascode Association of SOI MOSFETs through SPICE Simulations
year: 2020

abstract: This paper presents two optimized designs for the Wilson and improved Wilson MOS current mirrors. The paper includes a detailed analysis of the high frequency behaviour of the Wilson and improved Wilson MOS current mirrors, which shows a current transfer function with two poles and one zero. The two optimized designs lead to a response which is better than that of the simple current mirror.
author_names: Gaetano Palumbo
title: Frequency behaviour of the Wilson and improved Wilson MOS current mirrors: analysis and design strategies
year: 1996

abstract: P. Devendra Kumar1, D.Vijay Kumar2 1(M.Tech in VLSI &EMBEDED SYSTEM DESIGN, Student) 2Assistant Professor, Electronics and Communication Engineering Department Velagapudi Ramakrishna Siddhartha Engineering College, Jawaharlal Nehru Technological University Kakinada, Kanuru, Vijayawada, Andhra Pradesh Abstract: Now a days Low voltage along with low power topologies of analog and mixed signal designs have gained enormous importance due to increased demand of portable devices. The bulk driven technology is emerging as an important design technique to achieve intensifies performance in low voltage analog circuits. Low voltage self biased high swing cascode current mirror employing bulk driven nmos transistor is proposed and proposed circuit has to be simulated in cadence tool, and different current mirrors like wilson current mirror and triple cascode current mirror are implemented under bulk driven technology and simulated in cadence tool, and the results are compared with the gate driven technology
author_names: Patel Devendra Kumar
title: Analysis of Low Voltage Bulk Driven High Swing Cascode Current Mirrors for Low Voltage Applications
year: 2017

abstract: In this work a comparison between the performance of current mirrors implemented with uniformly doped and graded channel (GC) transistors operating down to low temperature (150 K) is presented. This analysis has been carried out through experimental measurements of Common source, Cascode and Wilson current mirrors architectures. The advantages of the use of graded channel transistors for implementation of current mirrors in comparison to standard ones is discussed, focusing on the increase of output swing and output resistance. In all architectures some performance degradation has been observed with the temperature reduction, although current mirrors with GC transistors still present better performance than those implemented with standard SOI transistors. Two dimensional numerical simulations were performed in order to further investigate the behavior of graded channel current mirrors, looking at the bias condition of each transistor in the current mirror architectures. The obtained results indicate that good performance, compared to that of GC current mirrors, may be obtained by combining both standard and graded channel transistors, rather than using the same channel engineering for all devices in the circuit.
author_names: Michelly de Souza

Bruna Cardoso Paz

Denis Flandre

Marcelo Antonio Pavanello
title: Asymmetric channel doping profile and temperature reduction influence on the performance of current mirrors implemented with FD SOI nMOSFETs
venue: Microelectron. Reliab.
year: 2013

abstract: This paper presents an optimized design for the Wilson and improved Wilson MOS current mirrors. The paper includes a detailed analysis of the high frequency behaviour of the Wilson and improved Wilson MOS current mirrors, which shows a current transfer function with two poles and one zero. The optimized designs leads to a response which is better than that of the simple current mirror. The proposed design is verified with Spice simulation of the current mirror in a CMOS 2 /spl mu/m technology.<ETX>
author_names: Gaetano Palumbo
title: Design of the Wilson and improved Wilson MOS current mirrors reach the best settling time
venue: Proceedings of IEEE International Symposium on Circuits and Systems ISCAS '94
year: 1994

abstract: This paper presents a comprehensive study of a negative feedback mechanism in the bipolar Wilson current mirror, which is one of the most popular current mirrors used in electronic circuit designs. Although the operation of the Wilson current mirror has been covered in most microelectronic circuit design textbooks, its unusual negative feedback mechanism is still largely obscure. As a result, attempts to calculate the output resistance of the Wilson current mirror using classical negative feedback analysis have usually given the answer that is inconsistent with the correct answers obtained from direct analysis. We believe that this is probably the main reason why the negative feedback analysis of the Wilson current mirror is mostly ignored in the literature. In this paper, we aim to disclose the hidden subtleties of the Wilson current mirror by shedding a new light on its dual loop negative feedback operation. It is shown in the paper that by doing so, we will be able to apply the negative feedback theory to the Wilson current mirror and correctly calculate its current gain and port resistances.
author_names: Jirayuth Mahattanakul

Sitthichai Pookaiyaudom

Christofer Toumazou
title: Understanding Wilson current mirror via the negative feedback approach
venue: ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196)
year: 2001

abstract: The full wave wide band precision rectifier with modified second type current conveyor (MCCII) realized with the operational amplifier and three current mirrors (CM) is presented in this paper. The model of operational amplifier is adapted in such a way that it is possible to use supply current sensing in supply rails of operational amplifier with SPICE program. Wilson's realization for current mirrors is used for precise current reproduction in a wide range of the amplitude values as well as frequencies.
author_names: Slobodan Dukic
title: The analysis of full wave wide band precision rectifier with modified second type current conveyor
year: 2007

abstract: In this paper, current mirror based Current Amplifiers (CAs) with differential structure are simulated and compared by PSPICE program using HP 0.8um CMOS process parameters. The proposed CA designs are based on four well known current mirror structures such as wilson, improved wilson, cascode, and modified cascode current mirrors. The comparison parameters are power dissipation, bias current, input resistance, output resistance, and cut off frequency obtained from DC transfer characteristics and AC frequency response of proposed circuits.
author_names: Mahmut Tokmakci
title: The comparative analysis of current mirror based CMOS current amplifiers
venue: IEICE Electron. Express
year: 2007

abstract: The AC current transfer ratios for BJT current mirrors operating with nanoampere DC bias currents have been measured and analysed. The new measurement technique uses current feedback topology instrumentation amplifiers to sense indirectly the input and output currents of a current mirror under test. Sample results are reported for the popular two transistor and Wilson current mirrors. The measured frequency response data show that bipolar integrated circuit current mirrors, biased at nanoampere DC currents, have current transfer ratios in the range 0.7 to 1 with sufficient bandwidth for use in micropower circuit design. There is close agreement between measured and theoretical data. However, the results of SPICE simulation deviate at very low currents, confirming previous reports of inadequacies in the BJT model under these conditions.
author_names: Mike Brinson

Daniel J Faulkner
title: Measurement and analysis of BJT current mirror frequency response at low DC bias currents
year: 1997