General-purpose operational amplifiers (op amps) are not a specific brand but a category of electronic components widely used across industries. They are produced by various global semiconductor companies, including Texas Instruments (USA), Analog Devices (USA), STMicroelectronics (Switzerland/France), and Infineon Technologies (Germany). These op amps serve industries like automotive, industrial automation, consumer electronics, and telecommunications. Key products include low-power, high-speed, and precision op amps for signal conditioning, filtering, and amplification. Distributors like Radwell and Grainger supply these components for maintenance and industrial applications.