公开(公告)号：US20050249037A1

公开(公告)日：2005-11-10

申请号：US11118287

申请日：2005-04-28

Applicant: Daniel Kohn ,  David Kuhn ,  David Frost ,  Christopher Trask

Inventor： Daniel Kohn ,  David Kuhn ,  David Frost ,  Christopher Trask

IPC: A61B5/00 ,  G01S1/72

CPC classification number: A61B5/14539 ,  A61B5/0002

Abstract: A wireless instrument and methods for the remote monitoring of a plurality of biological parameters is described. The instrument includes a means of receiving data from a plurality of sensors, a means for converting the sensor data to a digital format, a means for collating the digitised sensor data into a single digital data stream, a transmitter for modulating a carrier signal with the digital data stream to create a modulated signal suitable for wireless transmission, an antenna for generating a radiating electromagnetic field to be received by a remote receiver, and an electrical power source. In a further embodiment, an additional means is provided for including an identification code in the transmitted digital data stream. In a further embodiment, an additional means is provided for monitoring operational parameters of the instrument and the inclusion of the monitored operational parameters in the transmitted digital data stream. In a further embodiment, an additional means is provided that allows for receiving signals from a remote transmitter for the remote manipulation of the instrument. In a further embodiment, the electrical power source is rechargeable and a recharging means is provided. A method is described for encapsulating the instrument in a one-piece housing that may include additional materials for increasing the mass of the instrument.

Abstract translation: 描述了用于远程监测多个生物学参数的无线仪器和方法。 该仪器包括从多个传感器接收数据的装置，用于将传感器数据转换为数字格式的装置，用于将数字化传感器数据整合为单个数字数据流的装置，用于利用 数字数据流，以产生适合于无线传输的调制信号，用于产生由远程接收机接收的辐射电磁场的天线和电源。 在进一步的实施例中，提供了附加装置，用于在发送的数字数据流中包括识别码。 在另一个实施例中，提供了附加装置，用于监视仪器的操作参数，以及将所监视的操作参数包括在所发送的数字数据流中。 在另一个实施例中，提供了一种附加装置，其允许从远程发射器接收用于远程操纵仪器的信号。 在另一实施例中，电源是可再充电的，并且提供充电装置。 描述了将仪器封装在一体式壳体中的方法，该壳体可以包括用于增加仪器质量的附加材料。

公开(公告)号：US06400936B1

公开(公告)日：2002-06-04

申请号：US09439662

申请日：1999-11-15

Applicant: Christopher Trask

Inventor： Christopher Trask

IPC: H04B126

CPC classification number: H03F3/26 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0088

Abstract: A low-noise, linearized double-balanced active mixer circuit is described, including a first input for a local oscillator (LO), a second input for an intermediate frequency (IF) signal, and an output for a resulting product radio frequency (RF) signal. The mixer circuit also includes a feedback transformer circuit for the purpose of improving the intermodulation (IM) performance. The lossless nature of the feedback topology gives the active mixer a lower noise figure (NF) characteristic than is realizable with conventional methods. The number of active devices is minimized in order to ensure that the mixer attains the lowest possible NF.

Abstract translation: 描述了一种低噪声，线性化的双平衡有源混频器电路，其包括用于本地振荡器（LO）的第一输入端，用于中频（IF）信号的第二输入端，以及用于所产生的产品射频 ）信号。 混频器电路还包括用于改善互调（IM）性能的反馈变压器电路。 反馈拓扑的无损性质使有源混频器具有比常规方法可实现的更低的噪声系数（NF）特性。 有效器件的数量被最小化以确保混合器达到最低可能的NF。

公开(公告)号：US6140849A

公开(公告)日：2000-10-31

申请号：US130740

申请日：1998-08-07

Applicant: Christopher Trask

Inventor： Christopher Trask

IPC: H03D7/14 ,  H03B19/00

CPC classification number: H03D7/1433 ,  H03D7/1425 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491

Abstract: A linearized double-balanced active mixer circuit is described, including a first input for a local oscillator (LO), a second input for an intermediate frequency (IF) signal, and an output for a resulting product radio frequency (RF) signal. The mixer circuit also includes a feedback circuit, along with a pair of operational amplifiers, for the purpose of improving the intermodulation (IM) performance. According to a further embodiment, the mixer circuit includes a series-shunt feedback amplifier in place of the operational amplifier, and a further embodiment includes an additional pair of transistors to further improve the IM performance. The output of the mixer circuit includes a signal combining circuit, composed of either a network of resistors having two output terminals, or two transformers having a common output terminal.

Abstract translation: 描述了一种线性化的双平衡有源混频器电路，其包括用于本地振荡器（LO）的第一输入端，用于中频（IF）信号的第二输入端和产生的产品射频（RF）信号的输出端。 混频器电路还包括反馈电路以及一对运算放大器，用于改善互调（IM）性能。 根据另一实施例，混频器电路包括代替运算放​​大器的串并联反馈放大器，并且另一实施例包括另外的一对晶体管以进一步改善IM性能。 混频器电路的输出包括由具有两个输出端子的电阻器网络或具有公共输出端子的两个变压器组成的信号组合电路。

公开(公告)号：US06271721B1

公开(公告)日：2001-08-07

申请号：US09338850

申请日：1999-06-23

Applicant: Christopher Trask

Inventor： Christopher Trask

IPC: G06G712

CPC classification number: H03F3/3066 ,  H03F1/347 ,  H03F3/19 ,  H03F3/26 ,  H03F2200/72

Abstract: An augmented common-base transistor amplifier circuit is described, including an input terminal and an output terminal. The amplifier circuit also includes an augmentation circuit, connected from the emitter to the base of the amplifying transistor, which detects an error voltage at the transistor emitter, amplifies and inverts the error voltage, and then applies the amplified error voltage to the base of the amplifying transistor, for the purpose of reducing the emitter error voltage and thus linearizing the common-base amplifier. According to a further embodiment, a second transistor is used for amplifying the emitter error voltage, and a further embodiment uses a transformer for augmentation. Circuits are described for single-ended, push-pull, and complementary amplifiers.

Abstract translation: 描述了增加的公共基极晶体管放大器电路，包括输入端子和输出端子。 放大电路还包括从发射极连接到放大晶体管的基极的增强电路，其检测晶体管发射极处的误差电压，放大和反相误差电压，然后将放大的误差电压施加到 放大晶体管，以减少发射极误差电压，从而使公共基极放大器线性化。 根据另一实施例，第二晶体管用于放大发射极误差电压，另一实施例使用变压器进行增强。 电路描述为单端，推挽和互补放大器。

公开(公告)号：US06393267B1

公开(公告)日：2002-05-21

申请号：US09349224

申请日：1999-07-07

Applicant: Christopher Trask

Inventor： Christopher Trask

IPC: H04B126

CPC classification number: H03D7/1425 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0088

Abstract: A low-noise, linearized double-balanced active mixer circuit is described, including a first input for a local oscillator (LO), a second input for an intermediate frequency (IF) signal, and an output for a resulting product radio frequency (RF) signal. The mixer circuit also includes a feedback transformer circuit for the purpose of improving the intermodulation (IM) performance. The lossless nature of the feedback topology gives the active mixer a lower noise figure (NF) characteristic than is realizable with conventional methods. According to a further embodiment, the mixer circuit includes an additional pair of complementary amplifier transistors for the purpose of further improving the IM performance.

Abstract translation: 描述了一种低噪声，线性化的双平衡有源混频器电路，其包括用于本地振荡器（LO）的第一输入端，用于中频（IF）信号的第二输入端，以及用于所产生的产品射频 ）信号。 混频器电路还包括用于改善互调（IM）性能的反馈变压器电路。 反馈拓扑的无损性质使有源混频器具有比常规方法可实现的更低的噪声系数（NF）特性。 根据另一实施例，混频器电路包括一对附加的互补放大器晶体管，用于进一步提高IM性能。

公开(公告)号：US06242964B1

公开(公告)日：2001-06-05

申请号：US09440440

申请日：1999-11-15

Applicant: Christopher Trask

Inventor： Christopher Trask

IPC: G06F744

CPC classification number: H03D7/1425 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0088

Abstract: A low-noise, linearized double-balanced active mixer circuit is described, including a first input for a local oscillator (LO), a second input for an intermediate frequency (IF) signal, and an output for a resulting product radio frequency (RF) signal. The mixer circuit also includes a feedback transformer circuit for the purpose of improving the intermodulation (IM) performance. The lossless nature of the feedback topology gives the active mixer a lower noise figure (NF) characteristic than is realizable with conventional methods. The mixer circuit further includes an augmentation circuit for correcting the non-linear input resistance of the common-base transistor amplifier. According to a further embodiment, the augmentation circuit includes a common-emitter transistor amplifier circuit. According to a further embodiment the augmentation circuit includes a positive-feedback transistor amplifier circuit. According to a further embodiment the augmentation circuit includes a two-winding transformer.

Abstract translation: 描述了一种低噪声，线性化的双平衡有源混频器电路，其包括用于本地振荡器（LO）的第一输入端，用于中频（IF）信号的第二输入端，以及用于所产生的产品射频 ）信号。 混频器电路还包括用于改善互调（IM）性能的反馈变压器电路。 反馈拓扑的无损性质使有源混频器具有比常规方法可实现的更低的噪声系数（NF）特性。 混频器电路还包括用于校正共基极晶体管放大器的非线性输入电阻的增强电路。 根据另一实施例，增强电路包括共发射极晶体管放大器电路。 根据另一实施例，增强电路包括正反馈晶体管放大器电路。 根据另一实施例，增强电路包括双绕组变压器。

公开(公告)号：US06172563B2

公开(公告)日：2001-01-09

申请号：US09340495

申请日：1999-06-30

Applicant: Christopher Trask

Inventor： Christopher Trask

IPC: H03F126

CPC classification number: H03F1/26 ,  H03F1/32 ,  H03F1/347

Abstract: A lossless feedback transistor amplifier circuit is described, including an input terminal and an output terminal, for the purpose of amplifying a signal voltage. The amplifier circuit also includes an augmentation circuit, connected from the emitter to the base of a common-base amplifying transistor, which detects an error voltage at the common-base transistor emitter, amplifies and inverts the error voltage, and then applies the amplified error voltage to the base of the common-base amplifying transistor, for the purpose of reducing the emitter error voltage and thus reducing the harmonic and intermodulation distortion of the lossless feedback amplifier. According to a further embodiment, a second transistor is used for amplifying the emitter error voltage. In a further embodiment, an inverting positive feedback amplifier is used for amplifying the emitter error voltage. In a further embodiment, a transformer is used to amplify and invert the emitter error voltage. Circuits are also described for augmented complementary lossless feedback transistor amplifiers.

Abstract translation: 描述了一种无损反馈晶体管放大器电路，其包括输入端和输出端，用于放大信号电压。 该放大器电路还包括从公共基极放大晶体管的发射极连接到基极的增强电路，其检测共基极晶体管发射极处的误差电压，放大并反相误差电压，然后施加放大误差 电压到共基放大晶体管的基极，以减少发射极误差电压，从而降低无损反馈放大器的谐波和互调失真。 根据另一实施例，使用第二晶体管来放大发射极误差电压。 在另一实施例中，使用反相正反馈放大器来放大发射极误差电压。 在另一个实施例中，变压器用于放大和反转发射极误差电压。 还描述了用于增强的互补无损反馈晶体管放大器的电路。