Bandgap voltage reference including a process and
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专利名称：Bandgap voltage reference including a
process and temperature insensitive start-
up circuit and power-down capability
发明人：Ricky F. Bitting
申请号：US07/248218
申请日：19880922
公开号：US04857823A
公开日：
19890815
专利内容由知识产权出版社提供
摘要：A bandgap voltage reference start-up circuit configured to initiate bandgap reference operation over an extended temperature range while being relatively insensitive to the effects of fabrication process variables. The circuit as preferably implemented includes a differential amplifier in the bandgap voltage reference stage which controls the source of current to contrasted bipolar devices situated in parallel paths. A comparator monitors the activities of the current source drive signal and compares that to an internally generated reference, which reference is configured to the matched in temperature and process variable effect the corresponding bandgap reference bipolar device and the current source device. During start-up the comparator initiates an injection of current into one bipolar device of the bandgap reference circuit to drive the bandgap loop into the appropriate of two potential operating states. The preferred embodiment also includes a power-down mode capability.
申请人：NCR CORPORATION
代理人：Wilbert Hawk, Jr.,Casimer K. Salys
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