Research and Design of Sine Wave and Square Wave Signal Generator

In modern electronic systems, signal generators are widely used in fields such as communication, signal processing, and automatic control systems. High-quality signal sources are key to ensuring system stability and reliability, especially in testing and measurement processes. Traditional signal generators often use complex hardware designs and costly dedicated chips, making it difficult to meet the cost and size requirements for mid- to low-frequency applications. Therefore, it is important to design a simple, cost-effective, and high-performance signal generator based on general-purpose operational amplifiers. In response to this need, this paper designs and implements a sine wave and square wave signal generator based on the UA741 operational amplifier, with a focus on adjustable control of signal frequency and duty cycle. By optimizing the design of the RC oscillation circuit and feedback network, the sine wave generator can output high-quality signals with low distortion, while the square wave generator achieves flexible duty cycle adjustment via adjustable resistors. Simulation results show that these circuits exhibit good stability and flexibility, making them suitable for communication, signal processing, and automatic control systems. Despite achieving the desired results, further research is needed in component selection and circuit optimization to improve precision and adaptability. Future work will focus on the automation of circuit adjustment mechanisms and performance validation under extreme conditions to meet more demanding application needs.