Low power, high accuracy lithium battery protection circuit

摘要

A method for measuring and filtering analog signals in a battery protection algorithm is achieved. A clock signal having a fixed period is generated. Analog signals are sampled to create sampled digital signals. The sampling is synchronized with the clock signal. The analog signals are sampled such that no two analog signals are sampled during a single fixed period. The sampled digital signals are filtered such that stored versions of the sampled digital signals are updated wheneyer the sampled digital signals transition to new states and remain in these new states for a defined number of the samplings. A circuit for measuring and filtering analog signals is in a battery protection circuit is also achieved. Sampling circuits are placed into standby mode when not sampling. <IMAGE>