Auto-nulled bandgap reference system and strobed bandgap reference circuit

[0031]Aside from the preferred embodiment or embodiments disclosed below, this invention is capable of other embodiments and of being practiced or being carried out in various ways. Thus, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. If only one embodiment is described herein, the claims hereof are not to be limited to that embodiment. Moreover, the claims hereof are not to be read restrictively unless there is clear and convincing evidence manifesting a certain exclusion, restriction, or disclaimer.

[0032]There is shown in FIG. 1 a basic substrate bandgap reference circuit 10 contained on the single MOS chip 12 including an amplifier 14 and a substrate PTAT bandgap core 16 which has a differential output 18, 20 to the differential input 22, 24 of amplifier 14. Amplifier 14 operates with a feedback circuit 15 which respond