专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

EP1756690B1 PRECISION CHOPPER-STABILIZED CURRENT MIRROR 有权
标题翻译：斩波稳定精密电动后视镜
公开(公告)号：EP1756690B1
公开(公告)日：2011-01-05
申请号：EP05759175.2
申请日：2005-06-15
申请人： Analog Devices, Inc.
发明人： BOTKER, Thomas, L. , DOUTS, Benjamin, A.
IPC分类号： G05F3/26
CPC分类号： H03F1/086 , G05F3/262 , H03F3/217 , H03F3/38 , H03F3/393 , H03F3/45179 , H03F3/45273 , H03F3/45744 , H03F2200/261 , H03F2200/91 , H03F2203/45592
摘要： A chopper-stabilized current mirror includes a pair of FETs connected to mirror an input current Iin,. In one embodiment, switching networks S1 and S2 have their respective inputs connected to the FETs' drains, and are operated with clock signals CLK1 and CLK2, respectively. An ro boost amplifier Al has its inputs connected to the outputs of S2 and its outputs connected to the gates of a pair of cascode FETs via a switching network S3 which, is operated with clock signal CLK2S, with the drain of one cascode FET connected to Iin and the drain of the other providing the mirror's output Iout Sl is clocked to reduce mismatch errors and S2 and S3 are clocked to reduce errors due to Al's offset voltage, with CLK2 and CLK2S shifted with respect to CLK1 to reduce errors due to parasitic capacitances.

2. 发明公开

EP2327153A1 AUTO-CORRECTION FEEDBACK LOOP FOR OFFSET AND RIPPLE SUPPRESSION IN A CHOPPER-STABILIZED AMPLIFIER 有权
标题翻译： AUTUCORREKTUR-RÜCKKOPPLUNGSSCHLEIFEFÜROFFSET- UNDWELLIGKEITSUNTERDRÜCKUNGIN EINEM CHOPPERSTABILISIERTENVERSTÄRKER
公开(公告)号：EP2327153A1
公开(公告)日：2011-06-01
申请号：EP09789261.6
申请日：2009-09-04
申请人： Analog Devices, Inc.
发明人： KUSUDA, Yoshinori , BOTKER, Thomas, L.
IPC分类号： H03F3/45
CPC分类号： H03F3/45977
摘要： A chopper-stabilized amplifier includes a main signal path having first and second chopping circuits at the inputs and outputs of a transconductance amplifier, and an auto- correction feedback loop. The feedback loop includes a transconductance amplifier connected to amplify the chopped output from the main signal path, a third chopping circuit which chops the amplified output, a filter which filters the chopped output to substantially reduce any offset voltage-induced AC component present in the signal being filtered, and a transconductance amplifier which receives the filtered output and produces an output which is coupled back into the main signal path. When properly arranged, the auto-correction feedback loop operates to suppress transconductance amplifier-related offset voltages and offset voltage-induced ripple that might otherwise be present in the amplifier's output.
摘要翻译：斩波稳定放大器包括在跨导放大器的输入和输出处具有第一和第二斩波电路的主信号路径和自动校正反馈回路。反馈回路包括跨导放大器，连接放大来自主信号路径的斩波输出，第三斩波电路，其对放大的输出进行斩波;滤波器，其对斩波输出进行滤波，以基本上减少信号中存在的任何失调电压引起的AC分量以及跨导放大器，其接收经滤波的输出并产生耦合回主信号路径的输出。当正确布置时，自动校正反馈环路用于抑制跨导放大器相关的偏移电压和偏移电压引起的纹波，否则可能存在于放大器的输出中。

3. 发明授权

EP2327153B1 AUTO-CORRECTION FEEDBACK LOOP FOR OFFSET AND RIPPLE SUPPRESSION IN A CHOPPER-STABILIZED AMPLIFIER 有权
标题翻译： FOR自动更正反馈回路失调电压和纹波斩波稳定放大器
公开(公告)号：EP2327153B1
公开(公告)日：2017-04-12
申请号：EP09789261.6
申请日：2009-09-04
申请人： Analog Devices, Inc.
发明人： KUSUDA, Yoshinori , BOTKER, Thomas, L.
IPC分类号： H03F3/45
CPC分类号： H03F3/45977

4. 发明公开

EP1756944A1 CURRENT-MODE INSTRUMENTATION AMPLIFIER 有权
标题翻译： STROMMODUS-INSTRUMENTATIONSVERSTÄRKER
公开(公告)号：EP1756944A1
公开(公告)日：2007-02-28
申请号：EP05759202.4
申请日：2005-06-15
申请人： Analog Devices, Inc.
发明人： BOTKER, Thomas, L.
IPC分类号： H03F3/30
CPC分类号： H03F1/086 , G05F3/262 , H03F3/217 , H03F3/38 , H03F3/393 , H03F3/45179 , H03F3/45273 , H03F3/45744 , H03F2200/261 , H03F2200/91 , H03F2203/45592
摘要： A current-mode instrumentation amplifier (IA) includes first and second buffer amplifiers which receive a differential voltage (VINP-VINN) and provide output voltages at respective output nodes; a resistance Rl is connected between the nodes and conducts a current IR1 that varies with VINP-VINN. In one embodiment, each amplifier includes a transistor connected in series with Ri which conducts current IR1; these currents are coupled to the input and output terminals of a current mirror, preferably via respective virtual ground nodes such that the IA requires only one current mirror, to produce the IA's output voltage. To minimize DC mismatch errors, the IA is chopper-stabilized, with the buffer amplifiers and signal current paths chopped using a two-phase chopping cycle.

5. 发明授权

EP1756945B1 CURRENT-MODE INSTRUMENTATION AMPLIFIER GAIN ERROR CORRECTION CIRCUITRY 有权
标题翻译：功耗模式仪表放大器的增益纠错电路
公开(公告)号：EP1756945B1
公开(公告)日：2011-01-19
申请号：EP05759628.0
申请日：2005-06-15
申请人： Analog Devices, Inc.
发明人： DOUTS, Benjamin, A. , BOTKER, Thomas, L.
IPC分类号： H03F3/30 , H03F1/08
CPC分类号： H03F1/086 , G05F3/262 , H03F3/217 , H03F3/38 , H03F3/393 , H03F3/45179 , H03F3/45273 , H03F3/45744 , H03F2200/261 , H03F2200/91 , H03F2203/45592
摘要： A chopper-stabilized current-mode instrumentation amplifier comprises first and second input amplifiers coupled to respective input nodes and arranged to produce respective currents in response to a differential input voltage applied to the input nodes; the currents are coupled to an output node. To reduce gain errors that might otherwise arise due to the parasitic capacitances of the on- and/or off-chip devices and/or structures making up the input amplifiers, the invention includes gain correction circuitry coupled to the IA. The gain correction circuitry replicates at least some of the parasitic capacitances, and provides compensation currents to the IA which reduce both input- and output-referred gain errors that might otherwise arise.

6. 发明公开

EP1756690A1 PRECISION CHOPPER-STABILIZED CURRENT MIRROR 有权
标题翻译：斩波稳定精密电动后视镜
公开(公告)号：EP1756690A1
公开(公告)日：2007-02-28
申请号：EP05759175.2
申请日：2005-06-15
申请人： Analog Devices, Inc.
发明人： BOTKER, Thomas, L. , DOUTS, Benjamin, A.
IPC分类号： G05F3/26
CPC分类号： H03F1/086 , G05F3/262 , H03F3/217 , H03F3/38 , H03F3/393 , H03F3/45179 , H03F3/45273 , H03F3/45744 , H03F2200/261 , H03F2200/91 , H03F2203/45592
摘要： A chopper-stabilized current mirror includes a pair of FETs connected to mirror an input current Iin,. In one embodiment, switching networks S1 and S2 have their respective inputs connected to the FETs' drains, and are operated with clock signals CLK1 and CLK2, respectively. An ro boost amplifier Al has its inputs connected to the outputs of S2 and its outputs connected to the gates of a pair of cascode FETs via a switching network S3 which, is operated with clock signal CLK2S, with the drain of one cascode FET connected to Iin and the drain of the other providing the mirror's output Iout Sl is clocked to reduce mismatch errors and S2 and S3 are clocked to reduce errors due to Al's offset voltage, with CLK2 and CLK2S shifted with respect to CLK1 to reduce errors due to parasitic capacitances.

7. 发明授权

EP1756944B1 CURRENT-MODE INSTRUMENTATION AMPLIFIER 有权
标题翻译：功率模式仪表放大器
公开(公告)号：EP1756944B1
公开(公告)日：2010-09-29
申请号：EP05759202.4
申请日：2005-06-15
申请人： Analog Devices, Inc.
发明人： BOTKER, Thomas, L.
IPC分类号： H03F3/30
CPC分类号： H03F1/086 , G05F3/262 , H03F3/217 , H03F3/38 , H03F3/393 , H03F3/45179 , H03F3/45273 , H03F3/45744 , H03F2200/261 , H03F2200/91 , H03F2203/45592
摘要： A current-mode instrumentation amplifier (IA) includes first and second buffer amplifiers which receive a differential voltage (VINP-VINN) and provide output voltages at respective output nodes; a resistance Rl is connected between the nodes and conducts a current IR1 that varies with VINP-VINN. In one embodiment, each amplifier includes a transistor connected in series with Ri which conducts current IR1; these currents are coupled to the input and output terminals of a current mirror, preferably via respective virtual ground nodes such that the IA requires only one current mirror, to produce the IA's output voltage. To minimize DC mismatch errors, the IA is chopper-stabilized, with the buffer amplifiers and signal current paths chopped using a two-phase chopping cycle.

8. 发明公开

EP1756945A1 CURRENT-MODE INSTRUMENTATION AMPLIFIER GAIN ERROR CORRECTION CIRCUITRY 有权
标题翻译：功耗模式仪表放大器的增益纠错电路
公开(公告)号：EP1756945A1
公开(公告)日：2007-02-28
申请号：EP05759628.0
申请日：2005-06-15
申请人： Analog Devices, Inc.
发明人： DOUTS, Benjamin, A. , BOTKER, Thomas, L.
IPC分类号： H03F3/30 , H03F1/08
CPC分类号： H03F1/086 , G05F3/262 , H03F3/217 , H03F3/38 , H03F3/393 , H03F3/45179 , H03F3/45273 , H03F3/45744 , H03F2200/261 , H03F2200/91 , H03F2203/45592
摘要： A chopper-stabilized current-mode instrumentation amplifier comprises first and second input amplifiers coupled to respective input nodes and arranged to produce respective currents in response to a differential input voltage applied to the input nodes; the currents are coupled to an output node. To reduce gain errors that might otherwise arise due to the parasitic capacitances of the on- and/or off-chip devices and/or structures making up the input amplifiers, the invention includes gain correction circuitry coupled to the IA. The gain correction circuitry replicates at least some of the parasitic capacitances, and provides compensation currents to the IA which reduce both input- and output-referred gain errors that might otherwise arise.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式