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1.发明授权公开(公告)号：US09203350B2
公开(公告)日：2015-12-01
申请号：US14185701
申请日：2014-02-20
Applicant: ANALOG DEVICES TECHNOLOGY
Inventor： Dennis A. Dempsey , Sean Brennan , Colin Lyden , John Jude O'Donnell
CPC classification number: H03F1/223 , H03F3/45475 , H03F2200/156 , H03F2203/45116 , H03F2203/45528 , H03F2203/45536 , H03F2203/45696 , H03M1/765 , H03M1/808
Abstract: An example transconductance circuit is provided in accordance with one embodiment. The transconductance circuit can comprise: an output node; at least one transistor; a variable resistance; and a differential amplifier; wherein the at least one transistor and the variable resistance are in series connection with the output node, an output of the differential amplifier is connected to a control node of the at least one transistor, a first input of the amplifier is responsive to an input signal, and a second input of the amplifier is responsive to a voltage across the variable resistance. Such a circuit may overcome noise problems in transconductance circuits which operate over a wide range of input signals with a fixed resistor in series with the at least one transistor.
Abstract translation: 根据一个实施例提供了示例性跨导电路。 跨导电路可以包括：输出节点; 至少一个晶体管; 可变电阻; 和差分放大器; 其中所述至少一个晶体管和所述可变电阻与所述输出节点串联连接，所述差分放大器的输出端连接到所述至少一个晶体管的控制节点，所述放大器的第一输入端响应于输入信号 并且放大器的第二输入响应可变电阻两端的电压。 这种电路可以克服在具有与至少一个晶体管串联的固定电阻器的宽范围的输入信号上工作的跨导电路中的噪声问题。
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2.发明申请TRANSCONDUCTANCE CIRCUIT AND A CURRENT DIGITAL TO ANALOG CONVERTER USING SUCH TRANSCONDUCTANCE CIRCUITS 有权交叉电路和使用这种交叉电路的模拟转换器的电流数字公开(公告)号：US20140340150A1
公开(公告)日：2014-11-20
申请号：US14185701
申请日：2014-02-20
Applicant: ANALOG DEVICES TECHNOLOGY
Inventor： Dennis A. Dempsey , Sean Brennan , Colin Lyden , John Jude O'Donnell
IPC: H03F3/45
CPC classification number: H03F1/223 , H03F3/45475 , H03F2200/156 , H03F2203/45116 , H03F2203/45528 , H03F2203/45536 , H03F2203/45696 , H03M1/765 , H03M1/808
Abstract: An example transconductance circuit is provided in accordance with one embodiment. The transconductance circuit can comprise: an output node; at least one transistor; a variable resistance; and a differential amplifier; wherein the at least one transistor and the variable resistance are in series connection with the output node, an output of the differential amplifier is connected to a control node of the at least one transistor, a first input of the amplifier is responsive to an input signal, and a second input of the amplifier is responsive to a voltage across the variable resistance. Such a circuit may overcome noise problems in transconductance circuits which operate over a wide range of input signals with a fixed resistor in series with the at least one transistor.
Abstract translation: 根据一个实施例提供了示例性跨导电路。 跨导电路可以包括：输出节点; 至少一个晶体管; 可变电阻; 和差分放大器; 其中所述至少一个晶体管和所述可变电阻与所述输出节点串联连接，所述差分放大器的输出端连接到所述至少一个晶体管的控制节点，所述放大器的第一输入端响应于输入信号 并且放大器的第二输入响应可变电阻两端的电压。 这种电路可以克服在具有与至少一个晶体管串联的固定电阻器的宽范围的输入信号上工作的跨导电路中的噪声问题。
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