公开(公告)号：US20150177772A1

公开(公告)日：2015-06-25

申请号：US14558839

申请日：2014-12-03

Applicant: The Swatch Group Research and Development Ltd

Inventor： Arnaud CASAGRANDE ,  Jean-Luc AREND

IPC: G05F3/26

CPC classification number: G05F3/262 ,  G05F3/242

Abstract: The electronic circuit with a self-calibrated PTAT current reference includes a PTAT current generator dependent on at least one integrated resistor for supplying a PTAT output current. It further includes a reference current generator dependent on at least one switched capacitor resistor, for supplying a reference current. The reference current and the PTAT output current are compared in a comparator so as to digitally adapt the programmable integrated resistor, or to digitally adapt the dimensional ratio of the transistors of a current mirror in the PTAT current generator, to supply the adapted PTAT output current.

Abstract translation: 具有自校准PTAT电流参考的电子电路包括取决于至少一个用于提供PTAT输出电流的集成电阻器的PTAT电流发生器。 它还包括一个参考电流发生器，它取决于至少一个开关电容电阻器，用于提供参考电流。 参考电流和PTAT输出电流在比较器中进行比较，以便对可编程集成电阻进行数字调适，或数字调整PTAT电流发生器中的电流镜的晶体管的尺寸比，以提供适配的PTAT输出电流 。