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1. 发明授权

US4714871A Level shifter for a power supply regulator in a television apparatus 失效
标题翻译：电视设备中电源调节器的电平移位器
公开(公告)号：US4714871A
公开(公告)日：1987-12-22
申请号：US943187
申请日：1986-12-18
申请人： Jack Craft , Michael L. Low , Bernard J. Yorkanis
发明人： Jack Craft , Michael L. Low , Bernard J. Yorkanis
IPC分类号： H04N3/18 , G05F3/22 , G05F3/26 , G05F3/28 , H04N3/22 , H04N5/63 , G05F3/20
CPC分类号： G05F3/265 , G05F3/225 , H04N5/63
摘要： A level shifter receives a variable input voltage such as a beam current representative voltage of a cathode ray tube and produces an output voltage that changes when the input voltage changes such that the output voltage is level shifted relative to the input voltage. The output voltage is coupled to an input terminal of an error amplifier of a power supply voltage regulator of a television receiver. The level shifter includes a current mirror arrangement responsive to the input voltage. A band gap type voltage source determines the amount of level shifting that is produced by the level shifter.

2. 发明授权

US4737851A On/off control circuitry for television 失效
标题翻译：电视开/关控制电路
公开(公告)号：US4737851A
公开(公告)日：1988-04-12
申请号：US42077
申请日：1987-04-24
申请人： Robert L. Shanley, II , Jack Craft , Michael L. Low , Jeffery B. Lendaro
发明人： Robert L. Shanley, II , Jack Craft , Michael L. Low , Jeffery B. Lendaro
IPC分类号： H02M3/28 , H04N5/63
CPC分类号： H04N5/63 , H02M2001/0032 , Y02B70/16
摘要： A control circuit of a television receiver power supply is constructed using a plurality of transistors operating in a common base configuration. The base electrodes of each of the transistors is coupled to a common conductor rail line that maintains the collector currents in the transistors temperature compensated over a wide range of operating temperatures during normal operation power-up mode of the receiver. In a standby mode of the receiver, power dissipation in the transistors is reduced by applying an on/off control signal to the common conductor rail line that prevents the flow of the collector currents in each of the transistors. Consequently, the supply current requirement of the control circuit is reduced during the standby mode.

3. 发明授权

US4853647A Current gain compensation arrangement 失效
标题翻译：电流增益补偿装置
公开(公告)号：US4853647A
公开(公告)日：1989-08-01
申请号：US188996
申请日：1988-05-02
申请人： Michael L. Low , Jack Craft
发明人： Michael L. Low , Jack Craft
IPC分类号： G05F3/22 , H03F3/45
CPC分类号： G05F3/225 , H03F3/45071 , H03F3/45479
摘要： A first pair of transistors, Q721 and Q723, operating, each, as an emitter follower, has a relatively low emitter current. The emitter followers drive corresponding base electrodes of transistors of a second pair of transistors, Q148 and Q149, coupled as a differential amplifier. A current gain compensating transistor Q726 has a current gain that tracks current gain variations of each of the transistors of the second pair. A base electrode current of the compensating transistor and a second current i.sub.Q727 that is unaffected by current gain variations are summed. The summed current is coupled via transistors Q722 and Q724 of a current mirror arrangement to first and second junction terminals, 610e and 610f. The junction terminals are coupled between the respective emitter electrodes of the emitter followers and the base electrodes of the second pair. Currents generated by the current mirror arrangement compensate for variations in the base currents in the transistors of the second pair so as to maintain the emitter currents in the emitter followers substantially unaffected by these variations.
摘要翻译：作为射极跟随器的第一对晶体管Q721和Q723具有相对低的发射极电流。发射极跟随器驱动耦合作为差分放大器的第二对晶体管Q148和Q149的晶体管的相应基极。电流增益补偿晶体管Q726具有跟踪第二对的每个晶体管的电流增益变化的电流增益。补偿晶体管的基极电流和不受电流增益变化影响的第二电流iQ727相加。总和电流通过电流镜配置的晶体管Q722和Q724耦合到第一和第二接合端子610e和610f。结端子耦合在发射极跟随器的相应发射极和第二对的基极之间。由电流反射镜装置产生的电流补偿第二对晶体管中的基极电流的变化，以便保持发射极跟随器中的发射极电流基本上不受这些变化的影响。

4. 发明授权

US4734771A Start-up control circuitry for a television apparatus 失效
标题翻译：电视机的起动控制电路
公开(公告)号：US4734771A
公开(公告)日：1988-03-29
申请号：US42078
申请日：1987-04-24
申请人： Jeffery B. Lendaro , Robert L. Shanley, II , Jack Craft , Michael L. Low
发明人： Jeffery B. Lendaro , Robert L. Shanley, II , Jack Craft , Michael L. Low
IPC分类号： H02M3/28 , H04N5/63
CPC分类号： H04N5/63 , H02M2001/0032 , Y02B70/16
摘要： A supply voltage is developed in accordance with an on/off control signal of a remote receiver during a start-up interval and during a power-up mode of operation of a television power supply. During a standby mode of operation, the supply voltage is switched off. The supply voltage produces a supply current in an oscillator that produces a signal at a horizontal rate related frequency. The supply voltage also produces a base drive current in a switching transistor of a horizontal driver only during the start-up interval. During a power-up mode, a run supply voltage is coupled to the oscillator and to the driver.

5. 发明授权

US08303239B2 Percussive shovel for robotic applications 有权
标题翻译：用于机器人应用的敲击铲
公开(公告)号：US08303239B2
公开(公告)日：2012-11-06
申请号：US12861710
申请日：2010-08-23
申请人： Philip Chu , Jack Wilson , Jack Craft , Kiel Davis
发明人： Philip Chu , Jack Wilson , Jack Craft , Kiel Davis
IPC分类号： E02F3/02 , A01B1/00
CPC分类号： E02F3/966 , B25J15/0019
摘要： A percussive digging tool attachment for a small robotic platform employs a percussor module for applying percussive impulses of relatively low impact at relatively high frequency to an attached digging tool to dig into or break up soil and rocks. By using low-impact, high-frequency percussive forces, it reduces the reaction loads on the small robotic platform while providing increased capability.
摘要翻译：用于小机器人平台的敲击式挖掘工具附件采用冲击模块，用于以相对高的频率将相对低的冲击冲击脉冲施加到附接的挖掘工具以挖掘或分解土壤和岩石。通过使用低冲击，高频冲击力，它可以降低小型机器人平台上的反作用力，同时提供更高的功能。

6. 发明授权

US4485353A PLL Oscillator synchronizing system with matrix for phase correction 失效
标题翻译： PLL振荡器同步系统与矩阵进行相位校正
公开(公告)号：US4485353A
公开(公告)日：1984-11-27
申请号：US383263
申请日：1982-05-28
申请人： Ta-Fang Fang , Erwin J. Wittmann , Leopold A. Harwood , Jack Craft
发明人： Ta-Fang Fang , Erwin J. Wittmann , Leopold A. Harwood , Jack Craft
IPC分类号： H03B5/32 , H03B5/36 , H03L7/099 , H04N9/45 , H03L7/08
CPC分类号： H04N9/45 , H03L7/099
摘要： Color reference oscillator in a color television receiver comprises a non-inverting amplifier, with positive feedback from its output conveyed via a crystal filter to its input. A quadrature phase shift network, coupled to the filter output, develops phase shifted signals which are matrixed with signals derived directly from the non-inverting amplifier to form resultant signals with a phase intermediate the phases of the matrix inputs. Control voltage outputs of a phase comparator, responsive to oscillator signals and to received synchronizing bursts, determine the magnitude and polarity of the output of a controlled amplifier which has at its input the resultant signals produced by said matrixing. The controlled amplifier output, and the output of an inverting amplifier also responsive to said resultant signals, share the load resistor of the non-inverting amplifier. Matrixing parameters and magnitude of inverting amplifier output are selected to eliminate adverse effects of undesired phase lag associated with the load circuit of the non-inverting amplifier.
摘要翻译：彩色电视接收机中的彩色参考振荡器包括一个非反相放大器，其输出端通过晶体滤波器向其输入端输出正反馈。耦合到滤波器输出的正交相移网络产生相移信号，该信号由直接从非反相放大器导出的信号进行矩阵化，以形成具有中间相位矩阵输入的相位的合成信号。响应于振荡器信号和接收的同步脉冲串，相位比较器的控制电压输出确定受控放大器的输出的幅度和极性，该控制放大器在其输入端由所述矩阵产生的合成信号。受控放大器输出以及反相放大器的输出也响应所述合成信号，共享非反相放大器的负载电阻。选择反相放大器输出的矩阵参数和幅值，以消除与非反相放大器负载电路相关的不期望的相位滞后的不利影响。

7. 发明授权

US4220974A AFT circuit 失效
标题翻译： AFT电路
公开(公告)号：US4220974A
公开(公告)日：1980-09-02
申请号：US955515
申请日：1978-10-30
申请人： Jack Craft
发明人： Jack Craft
IPC分类号： H03D3/08 , H03J7/02 , H03J7/04 , H03L7/02 , H03L7/06 , H04N5/50 , H03K5/20 , H04B1/16
CPC分类号： H03J7/02 , H03D3/08 , H03J7/04 , H03L7/06
摘要： An automatic fine tuning (AFT) circuit is provided which generates an AFT control signal in response to a video intermediate frequency (I.F.) signal. The I.F. signal is supplied to the inputs of two buffer amplifiers, which couple signals of like phase relationship to two inputs of a discriminator network. The discriminator network is tuned to the desired frequency of the video I.F. signal, and is responsive to the buffered I.F. signals for causing respective signal voltages to be developed at its inputs which vary differentially in magnitude in response to the frequency deviation of the I.F. signals from the desired I.F. frequency. The differentially related signals are detected by two peak detector networks for use as AFT control signals. The buffer amplifiers and peak detectors may be conveniently fabricated on a single I.C. chip. The discriminator network is coupled to the buffer amplifiers by two external I.C. terminals.
摘要翻译：提供了一种自动微调（AFT）电路，其响应于视频中频（I.F.）信号产生AFT控制信号。 I.F. 信号被提供给两个缓冲放大器的输入，两个缓冲放大器将相似相位的信号耦合到鉴别器网络的两个输入。鉴别器网络被调谐到视频I.F的期望频率。信号，并且响应于缓冲的I.F. 用于使各个信号电压在其输入处产生的信号，其响应于I.F的频率偏差在幅度上差异变化。来自所需的I.F.的信号频率。差分相关信号由两个峰值检测器网络检测，用作AFT控制信号。缓冲放大器和峰值检测器可以方便地在单个I C上制造。芯片。鉴别器网络通过两个外部I C耦合到缓冲放大器。终端。

8. 发明授权

US5184088A Controlled-gain transistor amplifier without D-C shift or signal phase reversal in load current 失效
标题翻译：控制增益晶体管放大器无负载电流的D-C偏移或信号相位反转
公开(公告)号：US5184088A
公开(公告)日：1993-02-02
申请号：US896442
申请日：1992-06-10
申请人： Jack Craft
发明人： Jack Craft
IPC分类号： H03G3/30 , H03G1/00 , H03G3/10
CPC分类号： H03G1/0023
摘要： Signal phase reversal as well as DC shift is avoided in the load current of a controlled-gain transistor amplifier of a type including: first and second transistors connected as a first emitter-coupled differential amplifier; means for applying an input signal voltage between the base electrodes of the first and second transistors; third and fourth transistors connected as a first current splitter, including an interconnection between the emitter electrodes of the third and fourth transistors to which the collector electrode of the first transistor connects; fifth and sixth transistors as a second current splitter, including an interconnection between the emitter electrodes of the fifth and sixth transistors to which the collector electrode of the second transistor connects; means for applying a control signal voltage between the base electrodes of the third and fourth transistors and between the base electrodes of the fifth and sixth transistors; means for applying an operating potential to a first interconnection, which is between the collector electrodes of the third and sixth transistors; and means for applying an operating potential to a second interconnection, which is between the collector electrodes of the fourth and fifth transistors, at least one of which means for applying an operating potential includes an output load. Signal phase reversal is avoided by an improvement which comprises: seventh and eighth transistors connected as a second emitter-coupled differential amplifier, means for applying the input signal voltage between the base electrodes of the seventh and eighth transistors, and means for connecting the collector electrodes of the seventh and eighth transistors to separate ones of the first and second connections.
摘要翻译：在包括：作为第一发射极耦合差分放大器连接的第一和第二晶体管的类型的受控增益晶体管放大器的负载电流中避免了信号相位反转以及DC偏移。用于在第一和第二晶体管的基极之间施加输入信号电压的装置; 第三和第四晶体管，连接成第一电流分离器，包括第一和第四晶体管的发射电极之间的互连，第一晶体管的集电极与之连接; 第五和第六晶体管作为第二电流分离器，包括第二晶体管的集电极连接到的第五和第六晶体管的发射极之间的互连; 用于在第三和第四晶体管的基极和第五和第六晶体管的基极之间施加控制信号电压的装置; 用于对第三和第六晶体管的集电极之间的第一互连施加工作电位的装置; 以及用于对第四和第五晶体管的集电极之间的第二互连施加工作电位的装置，其中至少一个用于施加工作电位的装置包括输出负载。通过改进来避免信号相位反转，其包括：作为第二发射极耦合差分放大器连接的第七和第八晶体管，用于在第七和第八晶体管的基极之间施加输入信号电压的装置，以及用于连接集电极的第七和第八晶体管，以分离第一和第二连接中的一个。

9. 发明授权

US4590513A Odd harmonic signal generator 失效
标题翻译：奇数谐波信号发生器
公开(公告)号：US4590513A
公开(公告)日：1986-05-20
申请号：US537815
申请日：1983-09-30
申请人： Jack Craft
发明人： Jack Craft
IPC分类号： H03B19/00 , H03B19/14 , H04N9/78 , H02M5/275
CPC分类号： H03B19/14 , H04N9/78
摘要： Odd harmonic generator includes two amplitude limiting amplifiers and a frequency selective signal combining network. Sinusoidal signal at frequency of chrominance subcarrier is applied to inputs of both amplifiers. The first amplifier provides signal comprising fundamental and odd harmonic frequency components. The second amplifier provides signal comprising a fundamental frequency component and odd harmonic frequency components that are comparatively much smaller than the odd harmonic frequency components of the first amplifier's output signal. Signals are combined so that fundamental frequency components offset. Output signal at third harmonic of chrominance subcarrier frequency is used as clock signal for CCD comb filter in a color TV receiver.
摘要翻译：奇次谐波发生器包括两个限幅放大器和一个频率选择信号组合网络。色度副载波频率处的正弦信号被施加到两个放大器的输入。第一放大器提供包括基波和奇次谐波频率分量的信号。第二放大器提供包括基本频率分量和比第一放大器的输出信号的奇次谐波频率分量相对小的奇次谐波分量的信号。信号组合使得基频分量偏移。彩色副载波频率的三次谐波输出信号用作彩色电视接收机中CCD梳状滤波器的时钟信号。

10. 发明申请

US20120111587A1 PERCUSSIVE SHOVEL FOR ROBOTIC APPLICATIONS 有权
公开(公告)号：US20120111587A1
公开(公告)日：2012-05-10
申请号：US12861710
申请日：2010-08-23
申请人： Philip CHU , Jack Wilson , Jack Craft , Kiel Davis
发明人： Philip CHU , Jack Wilson , Jack Craft , Kiel Davis
IPC分类号： E02F3/42 , A01B35/02
CPC分类号： E02F3/966 , B25J15/0019
摘要： A percussive digging tool attachment for a small robotic platform employs a percussor module for applying percussive impulses of relatively low impact at relatively high frequency to an attached digging tool to dig into or break up soil and rocks. By using low-impact, high-frequency percussive forces, it reduces the reaction loads on the small robotic platform while providing increased capability.
摘要翻译：用于小机器人平台的敲击式挖掘工具附件采用冲击模块，用于以相对高的频率将相对低的冲击冲击脉冲施加到附接的挖掘工具以挖掘或分解土壤和岩石。通过使用低冲击，高频冲击力，它可以降低小型机器人平台上的反作用力，同时提供更高的功能。

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