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1. 发明授权

US5430337A Transconductor stage 失效
标题翻译：跨导级
公开(公告)号：US5430337A
公开(公告)日：1995-07-04
申请号：US105736
申请日：1993-08-12
申请人： Rinaldo Castello , Roberto Alini , Francesco Rezzi , Valerio Pisati
发明人： Rinaldo Castello , Roberto Alini , Francesco Rezzi , Valerio Pisati
IPC分类号： H03F1/32 , H03F3/45 , H03H11/04 , H03K17/60 , G06G7/12
CPC分类号： H03F1/3211 , H03F3/45076 , H03F3/45282
摘要： A transconductor stage for high-frequency filters of a type which comprises an input circuit portion having signal inputs and an output circuit portion, incorporates a pair of field-effect transistors having respective gate and source terminals in common, and has the output portion formed of a pair of bipolar transistors connected to the aforesaid field-effect transistors.
摘要翻译：一种用于包括具有信号输入的输入电路部分和输出电路部分的类型的高频滤波器的跨导级，包括一对共同具有各自的栅极和源极端子的场效应晶体管，并且具有由连接到上述场效应晶体管的一对双极晶体管。

2. 发明授权

US5621358A Transconductor stage with controlled gain 失效
标题翻译：具有受控增益的跨导级
公开(公告)号：US5621358A
公开(公告)日：1997-04-15
申请号：US454924
申请日：1995-05-31
申请人： Valerio Pisati , Roberto Alini , Rinaldo Castello , Gianfranco Vai
发明人： Valerio Pisati , Roberto Alini , Rinaldo Castello , Gianfranco Vai
IPC分类号： H03F3/343 , H03F3/45 , H03G1/00 , H03H11/24
CPC分类号： H03F3/45883 , H03F3/45286 , H03F3/45807 , H03G1/0023 , H03F2203/45648
摘要： A controlled gain transconductor (20) which comprises a transconductance stage (3) having at least two input terminals (I1, I2) and at least two output terminals (O1, O2), an active load (4) connected to the output terminals of the transconductance stage and a control circuit (5) for the active load (4) connected between said output terminals (O1, O2) and the active load (4).Also provided is a circuit portion (10) being a replica of the transconductance stage (3), the active load (4) and the control circuit (5). This replicated portion (10) has an output connected to the control circuit (5) of the transconductor (20) to provide a predetermined voltage value (Vc) required for adjusting the DC gain of the device.
摘要翻译：包括具有至少两个输入端（I1，I2）和至少两个输出端（O1，O2）的跨导级（3）的受控增益跨导体（20），连接到跨导级和连接在所述输出端子（O1，O2）和有源负载（4）之间的有源负载（4）的控制电路（5）。还提供了作为跨导级（3），有源负载（4）和控制电路（5）的复制品的电路部分（10）。该复制部分（10）具有连接到跨导体（20）的控制电路（5）的输出，以提供调整装置的DC增益所需的预定电压值（Vc）。

3. 发明授权

US06424172B1 Circuit structure for synthesizing time-continual filters 有权
标题翻译：用于合成时间连续滤波器的电路结构
公开(公告)号：US06424172B1
公开(公告)日：2002-07-23
申请号：US09796996
申请日：2001-02-28
申请人： Valerio Pisati , Salvatore Portaluri , Marco Cazzaniga , Rinaldo Castello
发明人： Valerio Pisati , Salvatore Portaluri , Marco Cazzaniga , Rinaldo Castello
IPC分类号： H03K19082
CPC分类号： H03H11/0422
摘要： This invention relates to a circuit structure of the feedforward type with programmable zeroes, particularly for synthesizing time-continual filters. This structure comprises a pair of amplification cells interconnected at least one interconnection node and connected between a first signal input of a first cell and an output terminal of the second cell, each cell comprising a pair of transistors which have a conduction terminal in common and have the other conduction terminals coupled respectively to a first voltage reference through respective bias members. The structure further comprises a circuit leg connecting a node of the first cell to the output terminal and comprising a transistor which has a control terminal connected to the node of the first cell, a first conduction terminal connected to the output terminal, and a second conduction terminal coupled to a second voltage reference through a capacitor. Thus, a released “zero” can be introduced in the right semiplane of the pole-zero complex plane to improve the flattening of group gain.
摘要翻译：本发明涉及具有可编程零点的前馈类型的电路结构，特别是用于合成时间连续滤波器。该结构包括互连至少一个互连节点并连接在第一单元的第一信号输入和第二单元的输出端之间的一对放大单元，每个单元包括一对具有共同的导通端子并具有其它导电端子通过相应的偏置构件分别耦合到第一电压基准。所述结构还包括将所述第一单元的节点连接到所述输出端子并且包括具有连接到所述第一单元的节点的控制端子的晶体管，连接到所述输出端子的第一导通端子和第二导通端子通过电容器耦合到第二参考电压。因此，可以在极零复平面的右半平面中引入释放的“零”，以改善组增益的平坦化。

4. 发明授权

US5696457A Method for erasing a common mode current signal and transconductor assembly using such method 失效
标题翻译：使用这种方法擦除共模电流信号和跨导体组件的方法
公开(公告)号：US5696457A
公开(公告)日：1997-12-09
申请号：US454649
申请日：1995-05-31
申请人： Francesco Rezzi , Andrea Baschirotto , Rinaldo Castello
发明人： Francesco Rezzi , Andrea Baschirotto , Rinaldo Castello
IPC分类号： H03F3/45 , H03K5/22
CPC分类号： H03F3/45964 , H03F3/45278 , H03F3/45717 , H03F2203/45024 , H03F2203/45068 , H03F2203/45078 , H03F2203/45394 , H03F2203/45648
摘要： A low-voltage transconductor circuit in which the common mode gain of a first transconductor stage is compensated by a second transconductor stage (connected in parallel with the first transconductor stage) which has no differential mode transconductance, and which is connected so that its common mode transconductance offsets the common mode transconductance of the stage. This greatly reduces the common mode current signal at the output, while avoiding the necessity for a current sink at the source of the input transistors.
摘要翻译：一种低压跨导电路，其中第一跨导级的共模增益由不具有差分晶体跨导的第二跨导级（与第一跨导级并联连接）补偿，并且其连接使得其共模跨导抵消了该级的共模跨导。这大大降低了输出端的共模电流信号，同时避免了在输入晶体管的源极处的电流吸收器的必要性。

5. 发明授权

US07880545B1 Cascode compensation circuit and method for amplifier stability 有权
标题翻译：串级补偿电路和放大器稳定性方法
公开(公告)号：US07880545B1
公开(公告)日：2011-02-01
申请号：US12397118
申请日：2009-03-03
申请人： Alessandro Venca , Daniele Ottini , Francesco Rezzi , Rinaldo Castello
发明人： Alessandro Venca , Daniele Ottini , Francesco Rezzi , Rinaldo Castello
IPC分类号： H03F1/14
CPC分类号： H03F3/45475 , H03F1/14 , H03F1/34 , H03F3/3022 , H03F2200/153 , H03F2200/297
摘要： The present invention provides compensation for circuits. In one embodiment, a compensation circuit has a first terminal coupled to an output terminal of the circuit and a second terminal coupled to feed back the output voltage to an internal node. A damping circuit may also be coupled to the output terminal. The damping circuit adds a pole and a zero to the transfer function of the circuit. In one embodiment, the damping circuit modifies the effect of the output impedance of a load on the transfer function to increase the phase margin of the circuit such that the circuit remains stable over an increased range of output capacitor values.
摘要翻译：本发明提供对电路的补偿。在一个实施例中，补偿电路具有耦合到电路的输出端的第一端子和耦合以将输出电压反馈到内部节点的第二端子。阻尼电路也可以耦合到输出端子。阻尼电路向电路的传递函数添加极点和零点。在一个实施例中，阻尼电路改变负载的输出阻抗对传递函数的影响，以增加电路的相位裕度，使得电路在输出电容器值的增加范围内保持稳定。

6. 发明授权

US5576646A Transconductor circuit with high-linearity double input and active filter thereof 失效
标题翻译：具有高线性双输入和有源滤波器的跨导电路
公开(公告)号：US5576646A
公开(公告)日：1996-11-19
申请号：US473533
申请日：1995-06-07
申请人： Francesco Rezzi , Andrea Baschirotto , Rinaldo Castello
发明人： Francesco Rezzi , Andrea Baschirotto , Rinaldo Castello
IPC分类号： H03F3/34 , H03F3/45 , H03H11/04 , H03K5/22 , H03K17/60
CPC分类号： H03F3/45076 , H03H11/0433 , H03F2200/261
摘要： The invention relates to a transconductor circuit with a double input and a single output, comprising two input transistors (M1, M2) whose primary conduction terminals (D1, S1, D2, S2) are respectively connected together; in this way, variations in load current and voltage can be made lower, thereby also lowering distortion from changes in their transconductance.
摘要翻译：本发明涉及具有双输入和单输出的跨导电路，包括其一次导通端子（D1，S1，D2，S2）分别连接在一起的两个输入晶体管（M1，M2）以这种方式，可以降低负载电流和电压的变化，从而也降低其跨导变化的变形。

7. 发明授权

US5495166A MOS transistor threshold voltage generator 失效
标题翻译： MOS晶体管阈值电压发生器
公开(公告)号：US5495166A
公开(公告)日：1996-02-27
申请号：US45465
申请日：1993-04-08
申请人： Roberto Alini , Andrea Baschirotto , Rinaldo Castello , Salvatore Portaluri
发明人： Roberto Alini , Andrea Baschirotto , Rinaldo Castello , Salvatore Portaluri
IPC分类号： H03F1/30 , G05F3/24 , H03K17/14 , G05F3/16
CPC分类号： G05F3/24 , H03K17/145
摘要： A threshold voltage generator for a field-effect transistor, being of a type adapted to compensate for variations of the threshold voltage from a nominal value, comprising a first amplifier having a first input connected to a current generator; a second amplifier connected ahead of a second input of the first amplifier and having an input connected to another current generator; and a third amplifier connected after the first amplifier and having an output adapted to produce the value of said threshold voltage.
摘要翻译：一种用于场效应晶体管的阈值电压发生器，其类型适于补偿阈值电压与标称值的变化，包括具有连接到电流发生器的第一输入的第一放大器; 连接在第一放大器的第二输入端的第二放大器，并具有连接到另一电流发生器的输入端; 以及连接在所述第一放大器之后并具有适于产生所述阈值电压值的输出端的第三放大器。

8. 发明授权

US5332937A Transconductor stage for high frequency filters 失效
标题翻译：用于高频滤波器的跨导级
公开(公告)号：US5332937A
公开(公告)日：1994-07-26
申请号：US942678
申请日：1992-09-09
申请人： Rinaldo Castello , Roberto Alini , Andrea Baschirotto , Gianfranco Vai
发明人： Rinaldo Castello , Roberto Alini , Andrea Baschirotto , Gianfranco Vai
IPC分类号： H03F3/45 , H03H11/04 , H03K5/24
CPC分类号： H03F3/45179 , H03F3/45286 , H03F2203/45024 , H03H11/0433
摘要： A transconductor differential stage for high-frequency filters, which has a MOS differential input pair with common sources. The drain of each MOS input is connected to the emitter of an npn bipolar. These two matched bipolars have their gates connected together with the gate of a third bipolar, which is diode-connected. Two matched current sources feed the two bipolars, and a third current source feeds the third bipolar. A single controlled current sink is connected to the sources of both MOS input transistors, and also (through a resistor) to the third bipolar.
摘要翻译：用于高频滤波器的跨导差分级，具有通用源的MOS差分输入对。每个MOS输入的漏极连接到npn双极的发射极。这两个匹配的双极子的栅极与第二极二极管连接的第三极的栅极连接在一起。两个匹配的电流源馈送两个双极，第三个电流源馈送第三个双极。单个受控电流吸收器连接到两个MOS输入晶体管的源极，并且（通过电阻器）连接到第三极。

9. 发明授权

US08165555B1 Method and apparatus for filtering 有权
标题翻译：过滤方法和装置
公开(公告)号：US08165555B1
公开(公告)日：2012-04-24
申请号：US12372215
申请日：2009-02-17
申请人： Fernando De Bernardinis , Rinaldo Castello
发明人： Fernando De Bernardinis , Rinaldo Castello
IPC分类号： H04B1/10
CPC分类号： H04B1/18 , H03F2200/91 , H03F2203/45026 , H03H11/1213 , H03H11/1291
摘要： Aspects of the disclosure can provide a second order low pass filter. The second order low pass filter can work in current domain, and have high linearity for in-band signals and out-of-band signals. The second order low pass filter can include a MOS transistor having a gate terminal, a current input terminal and a current output terminal, a first capacitor coupled between the current input terminal and a ground connection and a second capacitor coupled between the gate terminal and the current input terminal.
摘要翻译：本公开的方面可以提供二阶低通滤波器。二阶低通滤波器可以在当前领域工作，并且对于带内信号和带外信号具有高线性度。二阶低通滤波器可以包括具有栅极端子，电流输入端子和电流输出端子的MOS晶体管，耦合在电流输入端子和接地连接器之间的第一电容器和耦合在栅极端子和电流输出端子之间的第二电容器电流输入端子。

10. 发明授权

US5994960A High speed switched op-amp for low supply voltage applications 失效
标题翻译：用于低电源电压应用的高速开关运算放大器
公开(公告)号：US5994960A
公开(公告)日：1999-11-30
申请号：US948562
申请日：1997-10-10
申请人： Andrea Baschirotto , Angelo Nagari , Rinaldo Castello
发明人： Andrea Baschirotto , Angelo Nagari , Rinaldo Castello
IPC分类号： H03F1/08 , H03F3/72 , H03F3/45 , H03F1/14
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 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 a switching circuit. The switching circuit is controlled by the same control phase 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起来的补偿电容器与切换电路。开关电路由相同的控制相位控制，使得放大器能够在禁止放大器以减少开关电流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，准时。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。

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