New CMOS based current follower and its applications to inductor simulator and band-pass filter

511-516A new CMOS based current follower (CF) with externally controllable X terminal intrinsic resistor has been proposed in this manuscript. Also, a new electronically tunable grounded inductor simulator using only a grounded capacitor has been proposed. The inductor simulator does not need any external resistors. It can be tuned electronically by changing a control voltage. However, it has a single active component matching condition. The simulations results are given in order to demonstrate the performance of the circuits

Grounded Voltage Controlled Positive Resistor with Ultra Low Power Consumption

In this work, a new CMOS based grounded voltage controlled positive resistor (GVCPR) with one control voltage is proposed. The proposed GVCPR employs only five CMOS transistors, one operated in triode region and others operated in saturation region or OFF. One of the main properties of the proposed GVCPR is its ultra low power consumption; however, a single active component matching condition is needed. A number of SPICE simulation results using IBM 0.13 um SIGE013 level-7 CMOS process parameters such as its performance analysis and verification in tunable voltage-mode first-order all-pass filter and high-Q & high-gain voltage-mode multiple-feedback second-order band-pass filter are included to confirm the theory. The superior performance of the proposed GVCPR is also proven by numeric Figure of Merit calculation

Realization of first-order current-mode filters with low number of MOS transistors

In this paper, a new current-mode (CM) circuit for realizing all of the first-order filter responses is suggested. The proposed configuration contains low number of components, only two NMOS transistors both operating in saturation region, two capacitors and two resistors. Major advantages of the presented circuit are low voltage, low noise and high linearity. The proposed filter circuit can simultaneously provide both inverting and non-inverting first-order low-pass, high-pass and all-pass filter responses. Computer simulation results achieved through SPICE tool and experimental results are given as examples to demonstrate performance and effectiveness of the proposed topology.In this paper, a new current-mode (CM) circuit for realizing all of the first-order filter responses is suggested. The proposed configuration contains low number of components, only two NMOS transistors both operating in saturation region, two capacitors and two resistors. Major advantages of the presented circuit are low voltage, low noise and high linearity. The proposed filter circuit can simultaneously provide both inverting and non-inverting first-order low-pass, high-pass and all-pass filter responses. Computer simulation results achieved through SPICE tool and experimental results are given as examples to demonstrate performance and effectiveness of the proposed topology

New Resistorless and Electronically Tunable Realization of Dual-Output VM All-Pass Filter Using VDIBA

In this paper, a new active element called voltage differencing inverting buffered amplifier (VDIBA) is presented. Using single VDIBA and a capacitor, a new resistorless voltage-mode (VM) first-order all-pass filter (APF) is proposed, which provides both inverting and non-inverting outputs at the same configuration simultaneously. The pole frequency of the filter can be electronically controlled by means of bias current of the internal transconductance. No component-matching conditions are required and it has low sensitivity. In addition, the parasitic and loading effects are also investigated. By connecting two newly introduced APFs in open loop a novel second-order APF is proposed. As another application, the proposed VM APF is connected in cascade to a lossy integrator in a closed loop to design a four-phase quadrature oscillator. The theoretical results are verified by SPICE simulations using TSMC 0.18 um level-7 CMOS process parameters with +-0.9 V supply voltages. Moreover, the behavior of the proposed VM APF was also experimentally measured using commercially available integrated circuit OPA860 by Texas Instruments.In this paper, a new active element called voltage differencing inverting buffered amplifier (VDIBA) is presented. Using single VDIBA and a capacitor, a new resistorless voltage-mode (VM) first-order all-pass filter (APF) is proposed, which provides both inverting and non-inverting outputs at the same configuration simultaneously. The pole frequency of the filter can be electronically controlled by means of bias current of the internal transconductance. No component-matching conditions are required and it has low sensitivity. In addition, the parasitic and loading effects are also investigated. By connecting two newly introduced APFs in open loop a novel second-order APF is proposed. As another application, the proposed VM APF is connected in cascade to a lossy integrator in a closed loop to design a four-phase quadrature oscillator. The theoretical results are verified by SPICE simulations using TSMC 0.18 um level-7 CMOS process parameters with +-0.9 V supply voltages. Moreover, the behavior of the proposed VM APF was also experimentally measured using commercially available integrated circuit OPA860 by Texas Instruments

EULAR recommendations for the management of familial Mediterranean fever

Familial Mediterranean fever (FMF) is the most common monogenic autoinflammatory disease, but many rheumatologists are not well acquainted with its management. The objective of this report is to produce evidence-based recommendations to guide rheumatologists and other health professionals in the treatment and follow-up of patients with FMF. A multidisciplinary panel, including rheumatologists, internists, paediatricians, a nurse, a methodologist and a patient representative, was assembled. Panellists came from the Eastern Mediterranean area, Europe and North America. A preliminary systematic literature search on the pharmacological treatment of FMF was performed following which the expert group convened to define aims, scope and users of the guidelines and established the need for additional reviews on controversial topics. In a second meeting, recommendations were discussed and refined in light of available evidence. Finally, agreement with the recommendations was obtained from a larger group of experts through a Delphi survey. The level of evidence (LoE) and grade of recommendation (GR) were then incorporated. The final document comprises 18 recommendations, each presented with its degree of agreement (0-10), LoE, GR and rationale. The degree of agreement was greater than 7/10 in all instances. The more controversial statements were those related to follow-up and dose change, for which supporting evidence is limited. A set of widely accepted recommendations for the treatment and monitoring of FMF is presented, supported by the best available evidence and expert opinion. It is believed that these recommendations will be useful in guiding physicians in the care of patients with FMF

A single-input multiple-output voltage-mode second-order universal filter using only grounded passive components

97-106A new single-input multi-output voltage-mode universal filter structure with high input impedance yielding easy cascadability is proposed in this paper. The proposed filter can provide all the standard second-order universal filter responses such as low-pass, band-pass, high-pass, notch filter (NF) and all-pass (AP) responses. NF and AP responses possess low output impedances but they can be obtained through a switch. Each time, one of the NF and AP responses can be obtained. Also, other responses which do not have low output impedances can be obtained simultaneously. The proposed filter uses three plus-type differential difference current conveyors and a minimum number of only grounded passive elements, and does not need any critical passive component matching conditions and cancellation constraints; thus, it is suitable for integrated circuit process. By adding extra one DDCC+ and two grounded resistors, a universal filter with a gain is obtained. Several computer simulations using SPICE program are included to verify the theory

Novel instrumentation amplifier and integrator circuits using single DDCC and only grounded passive elements

In the present paper, very simple voltage-mode instrumentation amplifier (IA) and integrator structures including only grounded passive components yielding easy integration are proposed. The proposed IA and integrator use single differential difference current conveyor. The proposed IA without requiring critical passive component matching conditions can be constructed with only two small-valued resistors to obtain high gain. The proposed integrator circuit has the feature of improved low frequency performance, which can be accomplished via a resistive component matching constraint. Also, both of the proposed circuits have high input impedances yielding easy cascadability. Both of the proposed configurations consume less power, and can be operated at higher frequencies. Some simulation and experimental results are included to confirm the theory

Novel instrumentation amplifier and integrator circuits using single DDCC and only grounded passive elements

767-775In the present paper, very simple voltage-mode instrumentation amplifier (IA) and integrator structures including only grounded passive components yielding easy integration are proposed. The proposed IA and integrator use single differential difference current conveyor. The proposed IA without requiring critical passive component matching conditions can be constructed with only two small-valued resistors to obtain high gain. The proposed integrator circuit has the feature of improved low frequency performance, which can be accomplished via a resistive component matching constraint. Also, both of the proposed circuits have high input impedances yielding easy cascadability. Both of the proposed configurations consume less power, and can be operated at higher frequencies. Some simulation and experimental results are included to confirm the theory

A New Simulated Inductor with Reduced Series Resistor Using a Single VCII±

This paper presents a new realization of a grounded simulated inductor using a single dual output second-generation voltage conveyor (VCII±) as an active building block, two resistors and one grounded capacitor. The main characteristic of the proposed circuit is that the value of the series resistor can be significantly reduced. Thus, it has the property of improved low-frequency performance. Another feature is the use of a grounded capacitor that makes the proposed circuit attractive for integrated circuit (IC) realization. A simple CMOS implementation of the required VCII± is used. However, a single passive component-matching condition is required for the proposed structure. As an application example, a standard fifth-order high-pass ladder filter is also given. SPICE simulations using 0.18 μm CMOS technology parameters and a supply voltage of ±0.9 V as well as experimental verifications, are carried out to support the theory