scholarly journals Design of active inductor-based butterworth and chebyshev microwave bandpass filters in standard 0.18µm-CMOS technology

2019 ◽  
Vol 8 (1) ◽  
pp. 27
Author(s):  
Jarjar Mariem ◽  
Pr. EL Quazzani Nabih
Keyword(s):  
Cmos Technology ◽  
Active Filters ◽  
Active Inductor ◽  
Current Mirror ◽  
Mos Transistors ◽  
Operational Transconductance Amplifier ◽  
Scattering Parameters ◽  
Frequency Range ◽  
Transconductance Amplifier ◽  
Insertion Losses

<p>In this paper we propose a synthesis of microwave active filters having Butterworth and Chebyshev responses in the frequency range 1GHz-2GHz. The filter fundamental block, used to build an active inductor, consists of CMOS-based Operational Transconductance Amplifier (OTA) circuits. These amplifiers are made out of simple current mirror using MOS transistors. The simulation procedure has been carried out through PSPICE software showing good performances regarding scattering parameters in terms insertion losses, of out-of-band rejection and phase.</p>

Low Power Operational Transconductance Amplifier (OTA) with Enhanced DC Gain and Slew-Rate

2013 ◽  
Vol 411-414 ◽  
pp. 1645-1648
Author(s):  
Xiao Zong Huang ◽  
Lun Cai Liu ◽  
Jian Gang Shi ◽  
Wen Gang Huang ◽  
Fan Liu ◽  
...  
Keyword(s):  
Low Voltage ◽  
Cmos Technology ◽  
Optimization Techniques ◽  
Current Mirror ◽  
Slew Rate ◽  
Operational Transconductance Amplifier ◽  
Theory Analysis ◽  
Transconductance Amplifier ◽  
Dc Gain ◽  
Simulation Results

This paper presents a low-voltage differential operational transconductance amplifier (OTA) with enhanced DC gain and slew-rate. Based on the current mirror OTA topology, the optimization techniques are discussed in this work. The proposed structure achieves enhanced DC gain, unit gain frequency (UGF) and slew-rate (SR) with adding four devices. The design of the OTA is described with theory analysis. The OTA operates at the power supply of 1.8V. Simulation results for 0.18μm standard CMOS technology show that the DC gain increases from 60.6dB to 65dB, the UGF is optimized from 2.5MHz to 4.3MHz, the SR is enhanced from 0.88 V/μs to 4.8 V/μs with close power consumption dramatically.

Tunable CMOS Active Inductor Using Widlar Current Source

2018 ◽  
Vol 28 (02) ◽  
pp. 1950027 ◽  
Author(s):  
Dhara P Patel ◽  
Shruti Oza-Rahurkar
Keyword(s):  
Quality Factor ◽  
Supply Voltage ◽  
Noise Analysis ◽  
Current Source ◽  
Cmos Technology ◽  
The Other ◽  
Active Inductor ◽  
Voltage Sensitivity ◽  
Current Mirror ◽  
Characterization Factors

A novel tuning principle for simple gyrator-based CMOS active inductor (AI) circuit is presented. The method makes use of Widlar current source to enhance the quality factor. The simulation of the proposed AI provides a maximum quality factor of 1819 at 2.88[Formula: see text]GHz. The AI shows the inductive bandwidth of 1.66[Formula: see text]GHz to 3.16[Formula: see text]GHz and power consumption of 6.87[Formula: see text]mW. The other characterization factors such as linearity, supply voltage sensitivity and noise analysis are discussed. The performance of the tunable AI using Widlar current source are compared with the same using a simple current mirror. An AI using a conventional current mirror (CCM) and Widlar current source have been implemented in the 0.18[Formula: see text][Formula: see text]m CMOS technology.

scholarly journals Miniaturized Coplanar Waveguide for Nanostructured Magnetostrictive Multilayer Characterization

Proceedings ◽  
2019 ◽  
Vol 2 (13) ◽  
pp. 851
Author(s):  
Abdelhatif El Fellahi ◽  
Aurélien Mazzamurro ◽  
Jean Claude Gerbedoen ◽  
Yannick Dusch ◽  
Olivier Bou Matar ◽  
...  
Keyword(s):  
Coplanar Waveguide ◽  
Complex Permeability ◽  
Network Analyzer ◽  
Scattering Parameters ◽  
Frequency Range ◽  
Electromagnetic Simulations ◽  
Insertion Losses ◽  
The Magnetic Field ◽  
Large Frequency ◽  
Permeability Spectrum

A miniaturized coplanar waveguide (CPW) on a Y-cut LiNbO3 substrate operating in Radio Frequency region (RF) is proposed for studying of magnetostrictive multi-layered structure. The structure is composed of a 14 × [TbCo2 (3.7 nm)/FeCo (4 nm)] nanostructured multi-layer. Using microtechnology process, the miniaturized CPW has been designed with a 50 µm wide signal line in the frequency range from 6 MHz to 6 GHz. Electromagnetic simulations based on ®Ansys/HFSS demonstrate insertion losses less than 2 dB and show that the magnetic field is more confined in the nanostructured multi-layer placed on top of the micro-sized CPW. By using Vectorial Network Analyzer (VNA) the Ferromagnetic Resonance (FMR) is investigated from the reflection (Sii) or transmission (Sij) coefficients of scattering parameters. An inversion model is finally used to extract the complex permeability spectrum of the thin-film in a large frequency range.

scholarly journals Design and analysis of current mirror OTA in 45 nm and 90 nm CMOS technology for bio-medical application

2020 ◽  
Vol 9 (1) ◽  
pp. 221-228
Author(s):  
Wan Mohammad Ehsan Aiman Wan Jusoh ◽  
Siti Hawa Ruslan
Keyword(s):  
Detection System ◽  
Complementary Metal Oxide Semiconductor ◽  
Medical Application ◽  
Cmos Technology ◽  
Open Loop ◽  
Oxide Semiconductor ◽  
Current Mirror ◽  
Ecg Signals ◽  
Transconductance Amplifier ◽  
And Performance

This paper proposed a design and performance analysis of current mirror operational transconductance amplifier (OTA) in 45 nm and 90 nm complementary metal oxide semiconductor (CMOS) technology for bio-medical application. Both OTAs were designed and simulated using Synopsys tools and the simulation results were analysed thoroughly. The OTAs were designed to be implemented in bio-potential signals detection system where the input signals were amplified and filtered according to the specifications. From the comparative analysis of both OTAs, the 45 nm OTA managed to produce open loop gain of 45 dB, with common mode rejection ratio (CMRR) of 93.2 dB. The 45 nm OTA produced only 1.113 μV√Hz of input referred noise at 1 Hz. The 45 nm OTA also consumed only 28.21 nW of power from ± 0.5 V supply. The low-power consumption aspect displayed by 45 nm OTA made it suitable to be implemented in bio-medical application such as bio-potential signals detection system where it can be used to amplify and filter the electrocardiogram (ECG) signals.

scholarly journals A Wide Tuning-Range CMOS VCO with a Tunable Active Inductor

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Hsuan-Ling Kao ◽  
Ping-Che Lee ◽  
Hsien-Chin Chiu
Keyword(s):  
Degrees Of Freedom ◽  
Tuning Range ◽  
Frequency Tuning ◽  
Cmos Technology ◽  
Feedback Loops ◽  
Fine Tuning ◽  
Active Inductor ◽  
Frequency Range ◽  
Wide Tuning Range ◽  
Output Frequency

This study describes a wide tuning-range VCO using tunable active inductor (TAI) topology and cross-coupled pair configuration for radio frequency operation. The TAI used two feedback loops to form a cascode circuit to obtain more degrees of freedom for inductance value. The TAI-VCO was fabricated using a 0.18 μm CMOS technology. The coarse frequency tuning is achieved by TAIs while the fine tuning is controlled by varactors. The fabricated circuit provides an output frequency range from 0.6 to 7.2 GHz (169%). The measured phase noise is from −110.38 to −86.01 dBc/Hz at a 1 MHz offset and output power is from −11.11 to −3.89 dBm within the entire frequency range under a 1.8 V power supply.

scholarly journals Ultra-Low-Voltage Low-Power Bulk-Driven Quasi-Floating-Gate Operational Transconductance Amplifier

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Ziad Alsibai ◽  
Salma Bay Abo Dabbous
Keyword(s):  
Signal Processing ◽  
Power Consumption ◽  
Low Power ◽  
Low Voltage ◽  
Supply Voltage ◽  
Cmos Technology ◽  
Bias Current ◽  
Floating Gate ◽  
Operational Transconductance Amplifier ◽  
Transconductance Amplifier

A new ultra-low-voltage (LV) low-power (LP) bulk-driven quasi-floating-gate (BD-QFG) operational transconductance amplifier (OTA) is presented in this paper. The proposed circuit is designed using 0.18 μm CMOS technology. A supply voltage of ±0.3 V and a quiescent bias current of 5 μA are used. The PSpice simulation result shows that the power consumption of the proposed BD-QFG OTA is 13.4 μW. Thus, the circuit is suitable for low-power applications. In order to confirm that the proposed BD-QFG OTA can be used in analog signal processing, a BD-QFG OTA-based diodeless precision rectifier is designed as an example application. This rectifier employs only two BD-QFG OTAs and consumes only 26.8 μW.

Sign in / Sign up

Export Citation Format

Share Document