公开(公告)号：US06225930B1

公开(公告)日：2001-05-01

申请号：US09314090

申请日：1999-05-18

Applicant: Jimmie D Felps

Inventor： Jimmie D Felps

IPC: H03M166

CPC classification number: H03M1/0607 ,  H03M1/66

Abstract: An improved reference loop for a digital-to-analog converter (DAC) uses an approximate 50% duty cycle to improve the DC performance and the drift of the DAC at mid-scale. The 50% duty cycle also allows the DAC to provide the same performance over all outputs irrespective of the number of bits supplied to each input. The 50% duty cycle for the reference loop may be obtained from one of the DAC system outputs by forcing that output to supply a square wave output signal which may be used as input for the reference loop. The reference loop may alternatively be supplied by a DAC clock that is divided to obtain the desired 50% duty cycle input to the reference loop, in which case all outputs of the DAC are available for system output.

Abstract translation: 用于数模转换器（DAC）的改进的参考回路使用大约50％的占空比来改善中等规模的直流性能和DAC的漂移。 50％占空比还允许DAC提供与所有输出相同的性能，而不管提供给每个输入的位数。 参考环路的50％占空比可以通过强制该输出端提供可用作参考环路的输入的方波输出信号，从DAC系统输出之一获得。 参考环路可以替代地由DAC时钟提供，DAC时钟被分频以获得对参考环路的期望的50％占空比输入，在这种情况下，DAC的所有输出都可用于系统输出。

公开(公告)号：US6157255A

公开(公告)日：2000-12-05

申请号：US239128

申请日：1999-01-28

Applicant: Jimmie D Felps

Inventor： Jimmie D Felps

IPC: H03F3/30 ,  H03F3/45 ,  H03F3/50

CPC classification number: H03F3/45502 ,  H03F3/3067 ,  H03F3/45089 ,  H03F3/50

Abstract: An operational amplifier that may be fabricated on an integrated circuit is disclosed. Three precision emitter followers and four additional transistors comprise the major components of the op-amp. Two of the precision emitter followers are connected to the inverting and non-inverting inputs of the op-amp, respectively. The outputs of these two precision emitter followers are connected together to form a differential pair of precision emitter followers. Four additional transistors are used to convert the differential output of the precision emitter follower differential pair to a single-ended output and to provide gain. Two of the four additional transistors are used to mirror the currents in the drive transistors of the differential pair of precision emitter followers. These two mirrored currents are then fed to the drive and sense transistors of a current mirror respectively to convert the differential currents into a single-ended voltage. This single-ended output is coupled to the third precision emitter follower that is used as an output stage.

Abstract translation: 公开了可以在集成电路上制造的运算放大器。 三个精密发射极跟随器和四个附加晶体管构成运算放大器的主要部件。 两个精密发射极跟随器分别连接到运算放大器的反相和非反相输入端。 这两个精密发射极跟随器的输出端连接在一起形成精密发射极跟随器的差分对。 四个附加晶体管用于将精密射极跟随器差分对的差分输出转换为单端输出并提供增益。 四个附加晶体管中的两个用于镜像差分对精密发射极跟随器的驱动晶体管中的电流。 然后将这两个镜像电流分别馈送到驱动器并检测电流镜的晶体管，以将差分电流转换为单端电压。 该单端输出耦合到用作输出级的第三精密射极跟随器。

公开(公告)号：US06783382B2

公开(公告)日：2004-08-31

申请号：US10284226

申请日：2002-10-29

Applicant: Jimmie D Felps

Inventor： Jimmie D Felps

IPC: H01R1362

CPC classification number: H01R13/625 ,  H01R13/639

Abstract: A housing carries a male push-lock precision BNC connector. The function of the BNC latch of the male connector carried therein is performed by a spring-biased lock ring captive in a housing and that fits snugly and concentrically over a male sleeve, resulting in a double shell of two rigidly attached cylindrical portions that are coaxial, coextensive, yet separated to accept a BNC female shell. The double shell is held captive by anchoring it to the inside of the housing. The male sleeve has a slot and/or cut-away portion to accept the forward travel of the bayonet pins, which, when the connector halves are engaging, extend beyond the thickness of the sleeve and into the region occupied by the lock ring. The lock ring has grooves having various portions that engage the bayonet pins. As the housing containing these male parts is without rotation moved toward the female connector, the lock ring rotates as the grooves contact the bayonet pins. After sufficient angular rotation the grooves allow the two connector halves to approach each other without further rotation of the lock ring. After the male and female halves are essentially fully mated along the axial direction, the grooves clear the bayonet pins, and a bias spring rotates the lock ring, whose grooves now present a path at right angles to the axial path. The lock ring now blocks the separation of the connector halves. To create the tension needed to draw the precision BNC connector parts firmly together, the grooves resume a shallow angled path (ramp). The bias spring continues to provide the force to rotate the lock ring. Eventually the bayonet pins resist any further motion of the lock ring. The lock ring has a thumb tab that extends out from the housing to allow the motion of the lock ring to be reversed when removing the push-lock connector.

Abstract translation: 一个外壳带有一个公锁推精锁BNC连接器。 承载在其中的阳连接器的BNC闩锁的功能是通过一个固定在壳体中的弹簧偏置的锁定环来实现的，并且紧密地和同心地配合在阳套上，导致两个刚性连接的圆筒部分的双壳同轴 ，共同延伸，分开接受BNC女性外壳。 双壳通过将其固定在壳体的内部而被抓住。 凸形套筒具有狭缝和/或切口部分，以接受卡口销的向前行进，当连接器半部接合时，卡口销延伸超出套筒的厚度并进入锁定环所占据的区域。 锁定环具有凹槽，其具有接合卡口销的各种部分。 当包含这些阳部件的壳体没有旋转移动到阴连接器时，锁环随着凹槽接触卡口销而旋转。 在足够的角度旋转之后，凹槽允许两个连接器半部彼此靠近，而不会进一步旋转锁定环。 在阳和阴半部基本上沿轴向完全配合之后，凹槽清除卡口销，并且偏置弹簧使锁定环旋转，锁环现在呈现与轴向路线成直角的路径。 锁环现在阻止连接器半部的分离。 为了创建将精密BNC连接器部件牢固地拉紧在一起所需的张力，凹槽恢复一个浅斜的路径（斜坡）。 偏置弹簧继续提供旋转锁定环的力。 最终卡口针可抵抗锁环的任何进一步运动。 锁定环具有从壳体延伸出来的拇指突片，以便在拆卸推锁式连接器时允许锁定环的运动反转。

公开(公告)号：USD361317S

公开(公告)日：1995-08-15

申请号：US23518

申请日：1994-05-26

Applicant: Ronald A. Harmon ,  Jimmie D. Felps

Designer： Ronald A. Harmon ,  Jimmie D. Felps

公开(公告)号：US06351112B1

公开(公告)日：2002-02-26

申请号：US09143590

申请日：1998-08-31

Applicant: Jimmie D. Felps ,  Brian L. Richardson ,  Gerald R. Kinsley

Inventor： Jimmie D. Felps ,  Brian L. Richardson ,  Gerald R. Kinsley

IPC: G01R3102

CPC classification number: G01R35/002 ,  G01R1/06788

Abstract: An electrical probe is provided for use with an electrical instrument, such as an oscilloscope. The probe includes a probe body, a sensing element affixed to the probe body for sensing an electrical parameter and a storage device containing probe information that uniquely identifies the probe. The probe information is electronically transferred from the storage device to the electrical instrument when the probe is connected to the electrical instrument. The electrical instrument stores calibration information that is associated with the probe. The electrical instrument uses the probe information received from the storage device in the probe to access the associated calibration information. The accessed calibration information is used to calibrate measurements made with the probe.

Abstract translation: 提供电气探头用于电气仪器，如示波器。 探头包括探针主体，固定到探针主体的感测元件以感测电参数，以及包含唯一地识别探针的探针信息的存储装置。 当探针连接到电气仪器时，探头信息从存储设备电子传输到电气仪器。 电气仪器存储与探头相关联的校准信息。 电气仪器使用从探头中的存储装置接收到的探测信息来访问相关联的校准信息。 访问的校准信息用于校准使用探头进行的测量。

公开(公告)号：US06301547B1

公开(公告)日：2001-10-09

申请号：US09184105

申请日：1998-11-02

Applicant: Jimmie D Felps

Inventor： Jimmie D Felps

IPC: G01R1302

Abstract: A method and apparatus for automatically acquiring and storing a waveform measurement using a measuring instrument having a video display, such as an oscilloscope or spectrum analyzer, is disclosed. According to the invention, an operator first instructs the measuring instrument to automatically measure a probed waveform one or more times and to automatically store at least one selected sample set representing each probed waveform measurement. Thereafter, the operator is not required to interact with the measuring instrument during a measurement or series of measurements. Once measurement acquisition and storage is automatically completed, the measuring instrument alerts the operator by providing at least one indication for each selected sample set stored. The invention offers several advantages, for example, by allowing the operator to focus on a measurement probe in contact with a waveform source, instead of diverting his or her attention to observe the graphic display or otherwise interact with the measurement instrument during one or more measurement operations.

公开(公告)号：US06181264B2

公开(公告)日：2001-01-30

申请号：US09314488

申请日：1999-05-18

Applicant: Jimmie D Felps

Inventor： Jimmie D Felps

IPC: H03M166

CPC classification number: H03M1/0626 ,  G01R1/06766 ,  H03M1/0607 ,  H03M1/12 ,  H03M1/66

Abstract: A precision bipolar digital-to-analog converter (DAC) allows a first DAC channel to provide significantly reduced bipolar zero offset voltage. By supplying an additional DAC output as input to the first DAC channel, bipolar zero offset voltage in the first channel may be significantly reduced.

Abstract translation: 精密双极数模转换器（DAC）允许第一个DAC通道提供显着降低的双极零点偏移电压。 通过向第一DAC通道提供额外的DAC输出作为输入，第一通道中的双极零偏移电压可能会显着降低。

公开(公告)号：US4772810A

公开(公告)日：1988-09-20

申请号：US913788

申请日：1986-09-30

Applicant: Jimmie D. Felps

Inventor： Jimmie D. Felps

IPC: H03K17/16 ,  H02M1/34 ,  H02M3/335 ,  H03K17/60 ,  H01H47/00

CPC classification number: H02M1/34 ,  H02M3/335 ,  H02M2001/346 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A high efficiency non-dissipative snubber circuit suitable for most power supplies used in international markets is disclosed. Circuit uses diode-capacitor-inductor structure to capture input voltage equivalent and reverse polarity on snubber capacitor. No external voltage source is required.

Abstract translation: 公开了一种适用于国际市场上使用的大多数电源的高效率无耗散缓冲电路。 电路使用二极管 - 电容 - 电感结构来捕获缓冲电容器的输入电压等效和反极性。 不需要外部电压源。

公开(公告)号：US06172590B2

公开(公告)日：2001-01-09

申请号：US08941917

申请日：1997-10-01

Applicant: Karen P. Shrier ,  Gerald R. Behling ,  James B. Intrater ,  Mike Olla ,  Jimmie D. Felps ,  Kailash C. Joshi

Inventor： Karen P. Shrier ,  Gerald R. Behling ,  James B. Intrater ,  Mike Olla ,  Jimmie D. Felps ,  Kailash C. Joshi

IPC: H01C710

CPC classification number: H01L23/62 ,  H01L2924/0002 ,  H01L2924/09701 ,  H01L2924/00

Abstract: A mass-producible, cost-effective discrete electrical protection device utilizing a precision gap between two electrically conductive members attached to an electrically insulating substrate to provide over-voltage protection to an electrical device. In one aspect, the electrical protection device is a surface mountable device. In another aspect, the device has through-holes for accommodating leads on an electrical connector. Methods are provided also for making the electrical protection device.

Abstract translation: 一种大规模生产的，具有成本效益的离散电气保护装置，其利用连接到电绝缘基板的两个导电构件之间的精密间隙来向电气装置提供过电压保护。 在一个方面，电气保护装置是可表面安装的装置。 在另一方面，该装置具有用于在电连接器上容纳引线的通孔。 还提供了用于制造电气保护装置的方法。

公开(公告)号：US5977757A

公开(公告)日：1999-11-02

申请号：US184473

申请日：1998-11-02

Applicant: Jimmie D. Felps

Inventor： Jimmie D. Felps

IPC: G05F1/10 ,  G05F1/613 ,  G05F1/56

CPC classification number: G05F1/613

Abstract: A power supply includes a voltage regulator for generating a regulated voltage in response to an input voltage and an error signal, first and second output terminals connected to the voltage regulator for coupling the power supply to a load, first and second sense terminals and a sensing circuit for generating the error signal. The sensing circuit includes a high input impedance differential amplifier having first and second inputs respectively coupled to the first and second sense terminals for measuring a sense voltage between the sense terminals. The power supply may be operated in a remote sensing mode or in a local sensing mode. In the local sensing mode, no connections are required between the sense terminals and the output terminals.

Abstract translation: 电源包括用于响应于输入电压和误差信号产生调节电压的电压调节器，连接到电压调节器的第一和第二输出端子，用于将电源耦合到负载，第一和第二感测端子以及感测 用于产生误差信号的电路。 感测电路包括高输入阻抗差分放大器，其具有分别耦合到第一和第二感测端子的第一和第二输入端，用于测量感测端子之间的感测电压。 电源可以在遥感模式或本地感测模式下操作。 在本地感测模式下，感测端子和输出端子之间不需要连接。