Bandgap voltage regulator

专利名称：Bandgap voltage regulator发明人：Chau C. Tran,A. Paul Brokaw申请号：US11033058申请日：20050110公开号：US072030B1公开日：20070424

专利附图：

摘要：A bandgap voltage regulator is arranged such that, when a desired outputvoltage is present between its output and common terminals, current densities in a pairof bipolar transistors having unequal emitter areas are maintained in a fixed ratio. Thedifference in the transistors' base-emitter voltages is across a resistor, which thus

conducts a PTAT current. The regulator also generates a CTAT current, and both thePTAT and CTAT currents are made to flow in another resistor, with the resulting voltagesadded by superposition. The regulator's resistors are sized such that Vis an integral orfractional multiple of V, where Vis the bandgap voltage for the fabrication process usedto make the regulator's transistors, such that Vis temperature invariant, to a first order.The resistors are preferably realized using unit resistors having a predeterminedresistance, or series and/or parallel combinations of unit resistors.

申请人：Chau C. Tran,A. Paul Brokaw

地址：Malden MA US,Tucson AZ US

国籍：US,US

代理机构：Koppel, Patrick, Heybl & Dawson

更多信息请下载全文后查看