公开(公告)号：EP1501001A1

公开(公告)日：2005-01-26

申请号：EP03254577.4

申请日：2003-07-22

Applicant: STMicroelectronics Limited

Inventor： Tahir, Rashid

IPC: G05F3/26

CPC classification number: G05F3/265 ,  G05F3/205

Abstract: A biasing circuit comprising a first switching device having a control terminal, and first and second switching terminals. The first switching terminal being connected to a supply voltage, the second switching terminal being connected through a first resistive element to ground, and the control terminal being supplied by a reference voltage which is determined depending on the mode of operation of the circuit. The circuit further comprising a first branch connected between the control terminal and ground comprising a second resistive element in series with a second switching device. The second switching device forming part of a first current mirror having a second branch for effecting a generated bias value. During a normal mode of operation the reference voltage is dependant on the generated bias value, whereas during a standby mode of operation the reference voltage is connected to a low potential.

Abstract translation: 一种偏置电路，包括具有控制端子的第一开关装置和第一和第二开关端子。 第一开关端子连接到电源电压，第二开关端子通过第一电阻元件连接到地，并且控制端子由根据电路的操作模式确定的参考电压提供。 电路还包括连接在控制端和接地之间的第一分支，包括与第二开关装置串联的第二电阻元件。 形成第一电流镜的一部分的第二开关器件具有用于产生产生的偏置值的第二支路。 在正常工作模式下，参考电压取决于产生的偏置值，而在待机工作模式下，参考电压连接到低电位。