Patent ID: 7920016
Filing Date: 2011-04-05
Classification: G01R

Abstract:
1. A testing procedure for determining whether a monolithic voltage reference device meets a temperature drift specification, the testing procedure comprising: measuring a first non-room temperature output voltage of the monolithic voltage reference device while the monolithic voltage reference device is at a first non-room temperature which is substantially different than room temperature; storing first non-room temperature information in a memory within the monolithic voltage reference device which is a function of the first non-room temperature output voltage; measuring a second non-room temperature output voltage of the monolithic voltage reference device while the monolithic voltage reference device is at a second non-room temperature which is substantially different than the room temperature and the first non-room temperature; storing second non-room temperature information in the memory without destroying the first non-room temperature information which is a function of the second non-room temperature output voltage; and determining whether the monolithic voltage reference device meets the temperature drift specification based on a computation that is a function of both the first non-room temperature information and the second non-room temperature information.