فهرست مقالات hadi dehbovid

• دسترسی آزاد مقاله
  • صفحه چکیده
  • متن کامل
  
  1 - A Topology of Class-AB OTA with Increased DC-‎Gain and Slew-Rate
  Shahrbanoo Ghorbanzadeh Hadi Dehbovid Alireza Ghorbani Mehdi Abedi Pahnekola
  20.1001.1.26764342.2021.4.2.4.7
  The Operational Trans- conductance Amplifier (OTA)is a main building block in several analog signal and mixed- signal integrated circuits. This paper, a novel low power Class- AB CMOS Operational trans- conductance amplifier (OTA) with High gain and high slew rate is pr چکیده کامل

  The Operational Trans- conductance Amplifier (OTA)is a main building block in several analog signal and mixed- signal integrated circuits. This paper, a novel low power Class- AB CMOS Operational trans- conductance amplifier (OTA) with High gain and high slew rate is presented. The proposed two-stage OTA, the characteristics of class-AB are applied in both of the stages. The Use of active loads for the first stage provides the effective trans-conductance boosting and increased,DC-gain product. The nonlinear current mirrors boost the current of the second stage leading to the increase of the slew rate. The OTA canbe employed in low- voltage low- power circuits requiring a good performance/power tradeoff.Theoretical analysis and Cadence simulations prove the performance of the new OTA. The simulation results indicate that the DC gain is improved by abot 13db.The UGBW and phase margin of the proposed OTA are 305 MHZ and 65º ,respectively. پرونده مقاله
• دسترسی آزاد مقاله
  • صفحه چکیده
  • متن کامل
  
  2 - Design and Analysis of a Two stage Class AB Operational Trans-conductance Amplifier in 180 –nm Technology
  shahrbanoo ghorbanzadeh hadi dehbovid Alireza ghorbani Seyed Mehdi Abedi Pahnekolaei
  20.1001.1.26764342.2022.5.2.4.6
  This paper presents design concept of Operational Transconductance Amplifier (OTA). Using active loads in the first stage and improved recycling structure, the effective trans-conductance of the first stage is increased. Nonlinear current mirror boosts the current of th چکیده کامل

  This paper presents design concept of Operational Transconductance Amplifier (OTA). Using active loads in the first stage and improved recycling structure, the effective trans-conductance of the first stage is increased. Nonlinear current mirror boosts the current of the second stage; Therefore, Slew Rate (SR) is increased. The class-AB technique is achieved without enhancing power dissipation and without unity-gain bandwidth (UGBW) or noise deterioration. The efficiency of the proposed OTA is evaluated by several simulations in a 0.18μm CMOS process with the 1.8 V supply voltage. This technique is very helpful for high amplification, stability, and low power applications. From the simulation results, the two stage amplifier gives better performance compared to other topologies, especially in terms of gain, output swing, slew rate and unity-gain bandwidth. The circuit is able to achieve 95 dB gain, a 3V output swing, a 169 slew rate and a unity-gain bandwidth of 344 MHZ with a power supply voltage of 1.8 V. پرونده مقاله