Digital electronics are ubiquitous in the modern world, but analogue electronics also play a crucial role in many devices and applications. Analogue circuits are typically manufactured using silicon as the active material. However, the desire for improved performance, new devices and flexible integration has—as for their digital counterparts—led to research into alternative materials, including the use of two-dimensional (2D) materials. Here, we show that operational amplifiers—a basic building block of analogue electronics—can be created using the 2D semiconductor molybdenum disulfide (MoS₂) as the active material. The device is capable of stable operation with good performance, and we demonstrate its use in feedback circuits including inverting amplifiers, integrators, log amplifiers and transimpedance amplifiers. We also show that our 2D platform can be used to monolithically integrate an analogue signal preconditioning circuit with a MoS₂ photodetector.

数字电子在现代世界无处不在，但模拟电子在许多设备和应用中也起着至关重要的作用。典型地，使用硅作为活性材料来制造模拟电路。但是，对于改进的性能，新的设备和灵活的集成的渴望（就其数字对应物而言）导致了对替代材料的研究，包括使用二维（2D）材料。在这里，我们展示了可以使用2D半导体二硫化钼（MoS ₂）作为活性物质。该器件具有稳定的性能和良好的性能，我们展示了其在反馈电路中的应用，包括反相放大器，积分器，对数放大器和跨阻放大器。我们还表明，我们的2D平台可用于将模拟信号预处理电路与MoS ₂光电探测器单片集成。