Operational amplifiers (known as "op amps") are circuit units with very high amplification. In an actual circuit, usually a feedback function is associated with a feedback network. It is an amplifier with a special coupling circuit and feedback. The output signal can be the product of mathematical operations such as input signal addition, subtraction, differentiation, and integration. It was named "Operational Amplifier" due to its immediate application in analog computers to achieve mathematical operations. The op amp is a circuit unit named from a functional perspective and can be performed by discrete devices or implemented in semiconductor chips. With the development of semiconductor technology, most op amps exist in the form of a single chip. The wide variety of op amps is widely used in the electronics industry. In the late 1960s, Fairchild Semiconductor introduced the first widely used integrated circuit operational amplifier, model μA709.
The high precision and high speed of an op amp directly affect the magnitude of power consumption. When the current consumption is reduced, the gain bandwidth is decreased; on the contrary, the current consumption is increased when the offset voltage is decreased.
Many of the operational amplifier's electronic properties interact and interact with each other. Due to the increasing market demand for low-power applications such as wireless sensor nodes, Internet of Things (IoT), and building automation, to ensure that the performance of terminal equipment is optimized and the power consumption is as low as possible, understanding the balance between electronic features Vital.
The operational amplifier introduced today is an AD8131 analog devices inc.
Applied to
Video line driver
Digital line driver
Low power differential ADC driver
Differential in/out level shifting
Single-ended input to differential output driver