A new low-voltage low-power class-AB second generation voltage conveyor (VCII) is presented. The proposed circuit is based on an improved class-AB flipped voltage follower (FVF) designed by adding a simple negative feedback loop to the conventional class-AB circuit. This modification ensures high current drive capability of at least 2 mA for both falling and rising edges of input signal along with very low 2- $\text{m}{\Omega }$ output impedance and high accuracy. Benefiting from the new class-AB FVF, the proposed VCII features a very simple implementation, extremely low impedance at $Y$ and $Z$ terminals (2 $\text{m}{\Omega }$ ), high impedance at $X$ terminal (370 $\text{k}{\Omega }$ ) and high accuracy in current and voltage conveying (99% and 98%, respectively). Moreover, it exhibits current drive capability 117.6 times larger than its bias current ( $17~\mu \text{A}$ ). The circuit occupies $381.5\,\,\mu \text{m}\,\,\times 197\,\,\mu \text{m}$ area. The application of the proposed VCII as a voltage integrator is also presented. Simulation results using PSpice and 0.35- $\mu \text{m}$ CMOS technology with ±1.65-V supply voltage are provided to demonstrate the presented theory. A comparison with the literature is also provided.
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A New High Drive Class-AB FVF-Based Second Generation Voltage Conveyor
