scholarly journals Analysis of Current Mirrors with Asymmetric Self-Cascode Association of SOI MOSFETs through SPICE Simulations

2020 ◽  
Vol 15 (2) ◽  
pp. 1-5
Author(s):  
Paulo Rodrigues da Silva ◽  
Michelly De Souza
Keyword(s):  
Composite Structure ◽  
Common Source ◽  
Current Mirror ◽  
Output Resistance ◽  
Figures Of Merit ◽  
Current Mirrors ◽  
Source Current ◽  
The Common ◽  
Self Cascode ◽  
Asymmetric Configuration

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.

scholarly journals Simulação analítica de espelhos de corrente utilizando associação série do transistores SOI MOSFET

2020 ◽  
Author(s):  
◽  
Paulo Rodrigues Silva
Keyword(s):  
Open Loop ◽  
Common Source ◽  
Model Parameters ◽  
Current Mirror ◽  
Soi Mosfet ◽  
Current Mirrors ◽  
Threshold Voltages ◽  
Analog Blocks ◽  
Self Cascode ◽  
Output Conductance

This work presents an analysis of the advantages of symmetric (S-SC) and asymmetric (A-SC) self-cascode associations of nMOSFETs in relation to a single transistor (ST) SOI MOSFET by means of analytical simulations of basic analog blocks. Besides presenting the characteristics of a single transistor amplifier, current mirrors with different architectures are studied. The study and evaluation of these analog blocks were performed based on electricals characteristics obtained from SPICE circuits simulations, using ICAP/4 software. Initially, model parameters were adjusted to fit experimental data, to ensure simulated devices characteristics similar to the real ones. After these adjustments, symmetric self-cascode (association of two transistors with identical threshold voltages) and asymmetric self-cascode (association of two transistors with different threshold voltages) of SOI nMOSFETs were simulated at device level. Electrical parameters such as drain current (IDS), transconductance (gm), output conductance (gD), Early voltage (VEA), open loop gain voltage and gm/IDS ratio are presented as a function of the voltage applied to single transistor terminals and composite device (symmetric and asymmetric associations) with different dimensions. Then, the series associations and the single transistors (ST) were used in current mirrors circuits in CommonSource and single transistor in Cascode and Wilson architectures to verify the composed structure performance. It has been verified that current mirror using association S-SC present electrical behavior similar to the current mirror formed by SOI MOSFET ST, with the same channel length. It has been observed that the association A-SC features better electric performance in relation to the S-SC and ST in common-source current mirror, as well, in relation to Cascode and Wilson architectures using single transistors, in week and moderate inversion regions, due to the better output conductance and, consequently, the higher Early voltage

Junctionless Nanowire Transistors Based Common-Source Current Mirror

2021 ◽  
Author(s):  
Andre B. Shibutani ◽  
Michelly de Souza ◽  
Renan Trevisoli ◽  
Rodrigo T. Doria
Keyword(s):  
Common Source ◽  
Current Mirror ◽  
Nanowire Transistors ◽  
Source Current

No, I’m not… Chaucer? The Arabic motif in Troilus and Criseyde and Pushkin’s ‘The Prophet’ [‘Prorok’]

2021 ◽  
pp. 140-153
Author(s):  
A. A. Shapovalova
Keyword(s):  
Direct Contact ◽  
Common Source ◽  
Long Poem ◽  
Troilus And Criseyde ◽  
Potential Influence ◽  
Religious Texts ◽  
Common Motif ◽  
Courtly Romance ◽  
Genetic Source ◽  
The Common

The article discusses two works of literature: Troilus and Criseyde, a long poem written in the genre of courtly romance (1382–1386/1387) by G. Chaucer, and ‘The Prophet’ [‘Prorok’] (1826), a poem by A. Pushkin. The two works are compared due to a common motif: the opening of the chest and swapping of the heart as a sign of the person’s spiritual regeneration. In her comparative analysis of the two poems, the author attempts to identify their common source or the likelihood of direct contact — whether Pushkin had come across Chaucer’s work and borrowed the motif directly. As for the heart being replaced, it seems both poets may have been inspired by several biblical stories. Further analysis of the motif of the chest being opened suggests that the research should focus on the Arabic tradition alone and take into account the potential influence of Islamic religious texts on Pushkin as well as Chaucer. Relying on the available data about Russian and European relations with the Arabic world, the article hypothesises about the ways in which the motif in question could have reached each of the poets. The author names the Quran as the common genetic source of the two poems.

scholarly journals Low-voltage, low-power and high gain cmosota using active positive feedback with feed forward and FDCM techniques

2002 ◽  
Vol 15 (1) ◽  
pp. 93-101
Author(s):  
Lyes Bouzerara ◽  
Tahar Belaroussi ◽  
Boualem Amirouche
Keyword(s):  
Positive Feedback ◽  
Low Voltage ◽  
Supply Voltage ◽  
Phase Margin ◽  
Current Mirror ◽  
Power Supply Voltage ◽  
Gain Bandwidth ◽  
Frequency Dependent ◽  
Feed Forward ◽  
Current Mirrors

A low voltage, high dc gain and wideband load compensated cas code operational transconductance amplifier (OTA), using an active positive feedback with feed forward technique and frequency-dependent current mirrors (FDCM), is presented and analyzed. Such techniques stand as a powerful method of gain bandwidth and phase margin enhancements. In this paper, a frequency-dependent current mirror, whose input impedance increases with frequency, is used to form the feed forward path at the input of the current mirror with a feed forward capacitor. By using these techniques, the gain bandwidth product of the amplifier is improved from 115 MHz to 194 MHz, the phase margin is also improved from 85? to 95? and the gain is enhanced from 11 dB to 93 dB. This amplifier operates at 2.5 V power supply voltage drives a capacitive load of 1pF and gives a power dissipation of 7 mW. The predicted performance is verified by simulations using HSPICE tool with 0.8 fim CMOS AMS parameters.

scholarly journals Najib Hamadani and Ahmed at-Tusi’s Bulgarian oikonyms and their location in the former Volga Bulgaria

2016 ◽  
Vol 5 (3) ◽  
pp. 91-96
Author(s):  
Nikolay Valeryevich Belenov
Keyword(s):  
Historical Geography ◽  
Good Reason ◽  
Common Source ◽  
Present Stage ◽  
Medieval Manuscripts ◽  
Study Research ◽  
Folklore Studies ◽  
The Common ◽  
Information Borrowing ◽  
The Given

This article attempts to localize the fortresses of the Volga Bulgars (first of all, fortresses Marj and Tehshu) known from medieval authors reportedly Najib Hamadani and Ahmed at-Tusi. In the course of solving this problem the question of these authors data reliability is raised, as well as the common source of this information borrowing. There is a good reason to see this in the source known among the Arab-Persian historical and geographical medieval manuscripts as Rizal by Ahmed ibn Fadlan, the Secretary of Abbasid embassy to the Volga Bulgars Elteber Almush, who visited the Volga in 922. This fact explains the absence of Bulgarian cities known from other sources in the given lists as well as the question of uniqueness of Hamadani and at-Tusis information. On the basis of the sources synthesis, place-and folklore studies, the article proposes some options for localization of some of these forts and etymology options of Bulgarian oikonyms mentioned in the papers by the considered authors. The author proves the importance of place names data at the present stage of Bulgar study research, especially of Volga Bulgaria historical geography as well as further studies are planned.

scholarly journals Philosophical and legal foundations of the doctrine Marsil of Padua about the state

2020 ◽  
pp. 33-43
Author(s):  
А.А. Борзов
Keyword(s):  
Theoretical Basis ◽  
The State ◽  
State Sovereignty ◽  
Common Source ◽  
Legal Doctrine ◽  
Essential Unity ◽  
Legal Foundations ◽  
The Common

Учение представителя раннего итальянского гуманизма, выдающегося философа и правоведа, Марсилия Падуанского [1270(80) – 1342(43)] о государстве актуализирует платоновские политико-правовые идеалы. Мысль Платона о сущностном единстве человека и государства, формируемом общим источником их добродетели – идеей справедливости, составляет теоретическое основание гуманизма падуанца, его философско-правового учения о совокупной воле людей как источнике государственного суверенитета. The teaching of the representative of early Italian humanism, an outstanding philosopher and lawyer, Marsil of Padua [1270 (80) - 1342 (43)] about the state actualizes Plato's political and legal ideals. Plato's thought about the essential unity of man and the state, formed by the common source of their virtue - the idea of ​​justice, constitutes the theoretical basis of Padua's humanism, his philosophical and legal doctrine of the collective will of people as a source of state sovereignty.

scholarly journals Current Mirror Circuits with Improved Performance

2012 ◽  
pp. 117-122
Author(s):  
Bajrang Bansal ◽  
Prabhat Ranjan ◽  
Himanshu Kaushik
Keyword(s):  
Signal Processing ◽  
Current Mirror ◽  
Processing Elements ◽  
Current Mirrors ◽  
Op Amps ◽  
Improved Performance ◽  
Almost All

Current mirrors are core structures for almost all analog mode circuits and are integral part of a signal processing elements like op amps. The performance of analog structures largely depends on their characteristics. In this paper we present some of the current mirror circuits and analyze their performances, so that one can choose a suitable current mirror for a particular application.

scholarly journals Self-Cascode Current-Voltage Curve-Construction Algorithm from Single MOSFET Measurements for Analog Figures-of-Merit Extraction

2019 ◽  
Vol 14 (1) ◽  
pp. 1-6
Author(s):  
Li�gia Martins d'Oliveira ◽  
Valeriya Kilchytska ◽  
Denis Flandre ◽  
Michelly De Souza
Keyword(s):  
Threshold Voltage ◽  
Extraction Method ◽  
New Technologies ◽  
Experimental Measurements ◽  
Saturation Regime ◽  
Figures Of Merit ◽  
Voltage Curve ◽  
Current Voltage ◽  
Current Voltage Curve ◽  
Self Cascode

This paper proposes a curve extraction method for I-V curves and analog figures-of-merit of self-cascode MOSFET associations (SC) using a code that exploits I-V curves of single transistors as input. The method was validated by using experimental measurements of fabricated SC and the very single transistors that compose them. The results indicate a very low error between the SC generated by the code and the measured reference for operation in saturation regime and above threshold voltage, for both the I-V curves and their derivatives. This method is then valid for the assessment of the SC structures in new technologies, avoiding experimental dedicated layouts or complex set-ups.

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