Scholarlink

<p>This paper proposes a novel active building block, Voltage Conveyor Transconductance Amplifier (VCTA), to overcome the limitations of Second-Generation Current Conveyors (CCII) and Voltage Conveyors (VCII) in mixed-mode signal processing. By combining the voltage transfer capabilities of VCII with the tunable transconductance gain of a Transconductance Amplifier (TA), the VCTA offers enhanced versatility and performance. The block typically has four terminals: X, Y, Z, and O, which provides ease of implementation of the circuit design using fewer active blocks. A CMOS-based implementation of the proposed VCTA block using 0.18&#xa0;μm CMOS technology is presented. The expected terminal relationship and parasitics are obtained using the PSPICE simulations. Various simulated DC and AC sweep results confirm the proposed block's functionality utilizing 0.18&#xa0;μm TSMC CMOS technology specifications. It achieves a transconductance gain of 350&#xa0;μA/V with a bias current of 50&#xa0;μA. The cut-off frequencies of current gain (I<sub>X</sub>/I<sub>Y</sub>), voltage gain (V<sub>Z</sub>/V<sub>X</sub>), and transconductance (g<sub>m</sub>) are respectively located at 1.45&#xa0;GHz, 161&#xa0;MHz, and 1.08&#xa0;GHz. A second-order low-pass filter is implemented and simulated to show the application of the proposed block, demonstrating a pole frequency of 1.6&#xa0;MHz and a quality factor of 0.77, closely matching theoretical predictions. The filter has been designed using only one VCTA block. The VCTA addresses key challenges in analog circuit design, such as low-impedance voltage output, tunable gain, and efficient voltage-to-current conversion, making it ideal for real-time, high-frequency applications in communications, RF systems, and medical devices.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Voltage Conveyor Transconductance Amplifier (VCTA): A Novel Analog Building Block for Advanced Analog Signal Processing Applications

  • 期刊论文

  • 发表日期：

    2025年7月31日

查看全文
  • Chandan Kumar Choubey,
  • Manoj Kumar Tiwari,
  • Aruna Pathak,
  • Durgesh Nandan

摘要

This paper proposes a novel active building block, Voltage Conveyor Transconductance Amplifier (VCTA), to overcome the limitations of Second-Generation Current Conveyors (CCII) and Voltage Conveyors (VCII) in mixed-mode signal processing. By combining the voltage transfer capabilities of VCII with the tunable transconductance gain of a Transconductance Amplifier (TA), the VCTA offers enhanced versatility and performance. The block typically has four terminals: X, Y, Z, and O, which provides ease of implementation of the circuit design using fewer active blocks. A CMOS-based implementation of the proposed VCTA block using 0.18 μm CMOS technology is presented. The expected terminal relationship and parasitics are obtained using the PSPICE simulations. Various simulated DC and AC sweep results confirm the proposed block's functionality utilizing 0.18 μm TSMC CMOS technology specifications. It achieves a transconductance gain of 350 μA/V with a bias current of 50 μA. The cut-off frequencies of current gain (IX/IY), voltage gain (VZ/VX), and transconductance (gm) are respectively located at 1.45 GHz, 161 MHz, and 1.08 GHz. A second-order low-pass filter is implemented and simulated to show the application of the proposed block, demonstrating a pole frequency of 1.6 MHz and a quality factor of 0.77, closely matching theoretical predictions. The filter has been designed using only one VCTA block. The VCTA addresses key challenges in analog circuit design, such as low-impedance voltage output, tunable gain, and efficient voltage-to-current conversion, making it ideal for real-time, high-frequency applications in communications, RF systems, and medical devices.