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1. 发明公开

EP0836274A1 Common mode control circuit for a switchable fully differential OP-AMP 失效
标题翻译： Gleichtaktregelungsschaltungfüreinen geschalteten volldifferentiellenOperationverstärker
公开(公告)号：EP0836274A1
公开(公告)日：1998-04-15
申请号：EP96830523.5
申请日：1996-10-11
申请人： SGS-THOMSON MICROELECTRONICS s.r.l.
发明人： Baschirotto, Andrea , Nagari, Angelo , Castello, Rinaldo
IPC分类号： H03H1/00 , H03F3/00 , H03F3/45
CPC分类号： H03F3/005 , H03F3/45946 , H03F2203/45421
摘要： In switch-capacitor systems for extremely low supply voltage, employing fully differential switched op-amp, proper functioning of nMOS switches coupled to the inverting input node of an integrated stage capable of outputting a common mode control signal, is may possible by retaining the ground potential on the input node to prevent body effects on the threshold of nMOS switches by means of an auxiliary switched capacitor.
摘要翻译：在采用完全差分开关运算放大器的开关电容器系统中，使用全差分开关运算放大器，可以通过保持接地来耦合耦合到能够输出共模控制信号的集成级的反相输入节点的nMOS开关的正常工作输入节点上的电位，以通过辅助开关电容器来防止身体对nMOS开关阈值的影响。

2. 发明公开

EP0836275A1 High speed switched OP-AMP for low supply voltage applications 失效
标题翻译： Schneller geschalteter操作维护者安东尼昂
公开(公告)号：EP0836275A1
公开(公告)日：1998-04-15
申请号：EP96830524.3
申请日：1996-10-11
申请人： SGS-THOMSON MICROELECTRONICS s.r.l.
发明人： Baschirotto, Andrea , Nagari, Angelo , Castello, Rinaldo
IPC分类号： H03H1/00 , H03F3/72 , H03F1/08
CPC分类号： H03F3/72 , H03F1/086 , H03F2200/513
摘要： In a switched operational amplifier including a differential input stage and at least a second output stage the compensation capacitor (CC) commonly required to couple the output node of the second stage with the respective output node of the input differential stage of the amplifier is associated with switching means (M5P, M5N) controlled by the same control phase (Ph1) that enables/disables the amplifier for interrupting the connection between the compensation capacitor (CC) and the output node of the differential input stage during a phase in which the amplifier is disabled for reducing the switch-on time. Notably the differential input stage of the operational amplifier remains always active and only the second output stage is switched on and off.
摘要翻译：在包括差分输入级和至少第二输出级的开关运算放大器中，将第二级的输出节点与放大器的输入差分级的相应输出节点耦合的通常需要的补偿电容器（CC）与由相同的控制相位（Ph1）控制的开关装置（M5P，M5N），其能够/禁止放大器在放大器的相位期间中断补偿电容器（CC）和差分输入级的输出节点之间的连接禁用以减少接通时间。值得注意的是，运算放大器的差分输入级保持始终有效，只有第二个输出级接通和关断。

3. 发明公开

EP0689286A1 Low voltage, switched capacitance circuit employing switched operational amplifiers with maximized voltage swing 失效转让
标题翻译：使用低电源电压开关电容电路交换运算放大器具有优化的电压摆动
公开(公告)号：EP0689286A1
公开(公告)日：1995-12-27
申请号：EP94830318.5
申请日：1994-06-24
申请人： SGS-THOMSON MICROELECTRONICS S.r.l.
发明人： Castello, Rinaldo , Baschirotto, Andrea , Nagari, Angelo
IPC分类号： H03H19/00
CPC分类号： H03H19/00
摘要： A switched capacitance circuit functioning with unboosted control phases and using at least as an input switch of said switched capacitance a switched operational amplifier structure is provided with a switch for switching the output of the input operational amplifier to the supply node during an OFF-phase of the operational amplifier and another switch for switching to ground the output node of the switched capacitance during an ON-phase of said input operational amplifier in order to prevent charge losses via the substrate of the turn-on switches of the circuit. Precision is retained while ensuring a rail-to-rail dynamic range. Special arrangements may be implemented for controlling the amplitude of switching spikes when so required. A fully differential embodiment is also feasible with additional advantages.
摘要翻译：一种开关电容电路与未提升控制阶段起作用并且使用至少作为与所述的输入开关切换电容的切换运算放大器结构设置有一个开关，用于在在OFF相输入运算放大器的输出切换到电源节点运算放大器和另一个开关用于切换到接地开关电容的输出节点中的所述输入运算放大器中的导通相位，以防止经由该电路的导通开关的基片电荷损失。同时确保轨到轨动态范围精度得以保持。特别安排可以实现控制的。当这样需要的开关尖峰幅度。全差分实施例因此是用另外的优点是可行的。

4. 发明公开

EP0678980A1 Low distortion circuit with switched capacitors 失效转让
标题翻译： Verzerrungsarme Schaltung mit geschaltetenKapazitäten。
公开(公告)号：EP0678980A1
公开(公告)日：1995-10-25
申请号：EP94830189.0
申请日：1994-04-21
申请人： SGS-THOMSON MICROELECTRONICS S.r.l.
发明人： Nicollini, Germano , Nagari, Angelo
IPC分类号： H03H19/00
CPC分类号： G11C27/024 , G11C27/026 , H03F3/005 , H03H19/004 , H03K5/249
摘要： A switched capacitor circuit (1) comprising an operational amplifier (OA), having first and second input terminals and an output terminal, the first input terminal being connected to a first reference potential, said operational amplifier (OA) being provided with a negative feedback network including a first capacitive element (C1) which is connected between the second input terminal and the output terminal of the operational amplifier, a second capacitive element (C2) which has a first terminal alternately connected to the second input terminal of the operational amplifier (OA) and to a reference potential, and a second terminal connected to a first circuit node (A) which is alternately connected to a signal input terminal (VIN) and said first output terminal (VOUT) of the operational amplifier (OA), the circuit (1) further comprising a third capacitive element (CX) connected between said circuit node (A) and a reference potential.
摘要翻译：一种开关电容器电路（1），包括具有第一和第二输入端的运算放大器（OA）和输出端，所述第一输入端连接到第一参考电位，所述运算放大器（OA）被提供有负反馈网络，包括连接在运算放大器的第二输入端子和输出端子之间的第一电容元件（C1），具有与运算放大器的第二输入端子交替连接的第一端子的第二电容元件（C2） OA）和参考电位，以及连接到交替连接到运算放大器（OA）的信号输入端（VIN）和所述第一输出端（VOUT）的第一电路节点（A）的第二端子，电路（1）还包括连接在所述电路节点（A）和参考电位之间的第三电容元件（CX）。

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