发明授权
US08138743B2 Band-gap reference voltage source circuit with switchable bias voltage
有权
具有可切换偏置电压的带隙基准电压源电路
- 专利标题： Band-gap reference voltage source circuit with switchable bias voltage
- 专利标题（中）： 具有可切换偏置电压的带隙基准电压源电路
-
申请号： US12357992申请日： 2009-01-22
-
公开(公告)号： US08138743B2公开(公告)日： 2012-03-20
- 发明人: Akira Ide
- 申请人： Akira Ide
- 申请人地址： JP Tokyo
- 专利权人： Elpida Memory, Inc.
- 当前专利权人： Elpida Memory, Inc.
- 当前专利权人地址： JP Tokyo
- 代理机构： Foley & Lardner LLP
- 优先权： JP2008-014961 20080125
- 主分类号： G05F3/16
- IPC分类号： G05F3/16
摘要：
A band-gap reference voltage source circuit is constituted of a diode-pair circuit connected to a reference voltage output terminal, a first differential amplifier including a first transistor and a first operational amplifier, and a second differential amplifier including a second transistor and a second operational amplifier. The second differential amplifier operates based on a bias voltage, which is lower than a predetermined voltage, so as to forcedly pull up the level of the reference voltage output terminal via the second transistor before the first differential amplifier starts to pull up the level of the reference voltage output terminal up to the predetermined voltage via the first transistor.
公开/授权文献
- US20090189590A1 BAND-GAP REFERENCE VOLTAGE SOURCE CIRCUIT 公开/授权日：2009-07-30