公开(公告)号：EP1501000B1

公开(公告)日：2007-03-21

申请号：EP03254576.6

申请日：2003-07-22

Applicant: STMicroelectronics Limited

Inventor： Sigurdardottir, Anna

IPC: G05F3/24

CPC classification number: G05F3/245

公开(公告)号：EP1501000A1

公开(公告)日：2005-01-26

申请号：EP03254576.6

申请日：2003-07-22

Applicant: STMicroelectronics Limited

Inventor： Sigurdardottir, Anna

IPC: G05F3/24

CPC classification number: G05F3/245

Abstract: A programmable voltage reference circuit (1001) comprising a first reference voltage source (Vref0), a second reference voltage source (Vptat), at least one of the first and second reference voltage sources being dependent on temperature, and a first circuitry (5) connected to at least one of said first and second reference voltage sources to provide a third reference voltage (Vref3), said third reference voltage being dependent on temperature. The dependence on temperature and the value of said third reference voltage source, can be set by a choice of the resistors (R 1A ,R 1B ) at the inverting input of the operational amplifier (421) and by the choice of an appropriate value of the gains (A1,A3) of the stages (405,407) in said first circuitry (5). The programmable voltage reference circuit (1001) can also comprise a second circuitry (3) which provides a fourth reference voltage (Vref4) that also depends on temperature.

Abstract translation: 包括第一参考电压源（Vref0），第二参考电压源（Vptat）的可编程电压参考电路（1001），所述第一和第二参考电压源中的至少一个取决于温度，以及第一电路（5） 连接到所述第一和第二参考电压源中的至少一个以提供第三参考电压（Vref3），所述第三参考电压取决于温度。 可以通过选择运算放大器（421）的反相输入端的电阻（R1A，R1B）和通过选择适当的增益值来设定对温度的依赖性和所述第三参考电压源的值 所述第一电路（5）中的级（405,407）的（A1，A3）。 可编程电压参考电路（1001）还可以包括第二电路（3），其提供也取决于温度的第四参考电压（Vref4）。