U269As
U269As refers to a series of early integrated circuits manufactured by Texas Instruments in the 1960s. These were a family of monolithic operational amplifiers designed for general-purpose analog signal processing applications. The U269A series was notable for its relatively low cost and widespread availability, making it a popular choice for hobbyists and engineers alike.
The U269As typically featured high input impedance and low output impedance, characteristics essential for operational amplifier