Abstract: In this paper we have been studies on various design techniques of oscillator for biomedical application. The major subject of this research study is oscillators, which are electronic circuits that generate periodic signals with a constant frequency. A comprehensive review of various oscillator topologies and their characteristics, including stability, frequency range, and phase noise, is provided in this article. The project's objective is to review contemporary oscillator design approaches and consider how they might be applied in a variety of sectors, such as instrumentation, control, and communication systems. Oscillators are electronic circuits that generate repeated waves at set frequency. It is the foundation of numerous electrical gadgets, such as radios, televisions, and computers. Oscillators are used in measurement, control, and communication systems. Science routinely examines the behavior and characteristics of oscillators, such as their stability, frequency range, and phase noise. Researchers may also look at novel oscillator topologies and design approaches to improve performance or enable new applications. Oscillator research is essential for the development of cutting-edge electrical technologies and systems.