This document discusses the multivibrator bistable circuit. It begins with introducing the basic concept of a multivibrator, which is an electronic circuit that can generate a continuous signal from a two-state system. It then describes the characteristics of a bistable multivibrator, which has two stable states and uses external triggers instead of capacitors to switch between states. Examples of bistable multivibrator circuits using BJTs and op-amps are presented, along with their working principles and applications such as pulse generation, data storage, and logic operations.