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：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：US5939875A

公开(公告)日：1999-08-17

申请号：US818855

申请日：1997-03-17

Applicant: Jimmie D Felps ,  Brian L. Richardson

Inventor： Jimmie D Felps ,  Brian L. Richardson

IPC: G01R1/06 ,  G01R1/04 ,  G01R13/28 ,  G01R31/28 ,  G08B1/08

CPC classification number: G01R1/0416

Abstract: An interface having nine connections between a probe and test and measurement equipment includes a fixed voltage source located in the test and measurement equipment, which delivers through a first connection a positive fixed voltage, and through a second connection a negative fixed voltage. A voltage-programming resistor located in the probe produces a signal that is delivered from the probe through one of the connections to the equipment to control a programmed voltage source. The programmed voltage is delivered as a positive programmed voltage through one pin and as a negative programmed voltage through a second connection. A probe identification resistor is located in the probe. An ohmmeter in the equipment measures the resistance of the probe identification resistor through one of the connections. This identity is delivered into the equipment so that the equipment, by accessing an internal look-up table, can obtain the probe's characteristics to configure the equipment for the circuit requirements of the probe. A two-way communication path between the probe and the test and measurement equipment is provided through two of the connections. An offset current is provided in the equipment and is delivered through one connection to the probe.

Abstract translation: 在探头和测试和测量设备之间具有九个连接的接口包括位于测试和测量设备中的固定电压源，其通过第一连接传递正的固定电压，并通过第二连接传递负的固定电压。 位于探头中的电压编程电阻器产生一个信号，该信号通过与设备的连接之一从探头传送到控制编程的电压源。 编程电压通过一个引脚作为正编程电压传递，并通过第二个连接作为负编程电压传送。 探头识别电阻位于探头中。 设备中的欧姆表通过其中一个连接测量探头识别电阻的电阻。 这种身份被传送到设备中，以便通过访问内部查找表，设备可以获得探头的特性，以根据探头的电路要求配置设备。 通过两个连接提供探头和测试和测量设备之间的双向通信路径。 在设备中提供偏移电流，并通过一个连接传送到探头。

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：US6064268A

公开(公告)日：2000-05-16

申请号：US239418

申请日：1999-01-28

Applicant: Jimmie D Felps

Inventor： Jimmie D Felps

IPC: H03F3/50 ,  H03F3/04

CPC classification number: H03F3/50

Abstract: A first current source supplies current to the collector of an emitter follower stage and a sense transistor. The sense transistor programs a current mirror so that most of the base current required by the emitter follower transistor comes from the current mirror instead of the input. A second current source that requires more current that the first current source supplies is connected to the output of the emitter follower and sinks the current coming out of the emitter of the emitter follower and the collector current of a load transistor. The load transistor supplies the difference in current between the amount of current supplied by the first current source and the amount sunk by the second current source.

Abstract translation: 第一电流源向发射极跟随器级和读出晶体管的集电极提供电流。 感测晶体管编程电流镜，使得射极跟随器晶体管所需的大部分基极电流来自电流镜而不是输入。 需要第一电流源提供的更多电流的第二电流源连接到射极跟随器的输出端，并且吸收从射极跟随器的发射极流出的电流和负载晶体管的集电极电流。 负载晶体管提供由第一电流源提供的电流量与由第二电流源沉没的量之间的电流差。