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61. 发明授权

US5652575A Maintenance termination unit for telephone circuits 失效
标题翻译：电话线路维护终端单元
公开(公告)号：US5652575A
公开(公告)日：1997-07-29
申请号：US360756
申请日：1994-12-21
申请人： Dennis Malcolm Pryor , Michael Challis
发明人： Dennis Malcolm Pryor , Michael Challis
IPC分类号： H03K17/74 , H02H3/10 , H02H9/04 , H04M3/18 , H04M3/30 , H04B3/46
CPC分类号： H04M3/301 , H02H3/10 , H04M3/18 , H02H9/041
摘要： A maintenance termination unit (MTU) for use in telephone circuits. The MTU comprises a switching arrangement which can be connected between sets of terminal equipment in a communications channel comprising a pair of lines. The switching arrangement comprises: a DC voltage window detector circuit which, in use, is connected between the lines and is responsive to a voltage between the lines; and series switching circuits, which, in use, are connected in the lines. The arrangement may also include a shunt switching circuit, which, in use, is connected between the lines. The arrangement includes low pass filters associated with the switching circuits. The DC voltage window detector circuit will actuate the switching circuits when the DC voltage between the lines is within respective predetermined bands, but will not actuate the switching circuits when the DC voltage between the lines is not within the respective predetermined bands. The switching circuits can be remotely actuated by means of a DC signal on the channel. The low pass filters have a cut-off frequency which is sufficiently low to prevent the switching circuits from being actuated by a ringing signal on the channel.
摘要翻译： PCT No.PCT / GB93 / 01376 Sec。 371日期1994年12月21日 102（e）日期1994年12月21日PCT提交1993年6月30日PCT公布。公开号WO94 / 01961 日期1994年1月20日用于电话线路的维护终端单元（MTU）。 MTU包括可以在包括一对线路的通信信道中连接在一组终端设备之间的交换装置。开关装置包括：直流电压窗检测器电路，其在使用中连接在线路之间并响应于线路之间的电压; 和在使用中连接在一起的串联开关电路。该布置还可以包括在使用中连接在线之间的分流开关电路。该装置包括与开关电路相关联的低通滤波器。当线路之间的直流电压在相应的预定频带内时，直流电压窗口检测器电路将致动开关电路，但是当线路之间的直流电压不在相应的预定频带内时，直流电压窗口检测器电路将不致动开关电路。开关电路可以通过通道上的直流信号进行远程启动。低通滤波器具有足够低的截止频率，以防止开关电路被通道上的振铃信号驱动。

62. 发明授权

US5506527A Low power diode 失效
标题翻译：低功率二极管
公开(公告)号：US5506527A
公开(公告)日：1996-04-09
申请号：US227935
申请日：1994-04-15
申请人： Daniel C. Rudolph , Charles S. Stephens
发明人： Daniel C. Rudolph , Charles S. Stephens
IPC分类号： H03G11/02 , G06G7/62 , H03K17/30 , H03K17/66 , H03K17/74 , G06G7/12 , H03K3/26
CPC分类号： H03K17/302 , G06G7/62 , H03K17/667 , H03K2017/307
摘要： A common dictionary definition of a "diode" is "any electronic device that restricts current flow chiefly to one direction." This definition covers not only the conventional two lead PN junction semiconductor device presently known in the prior art (referred to herein as a "conventional diode") but also the electronic device of this invention (referred to herein as a "low power diode"). A low power diode has a comparator for comparing the voltage present at the anode and cathode of the diode. When the comparator determines that the voltage present at the anode of the low power diode equals or exceeds the voltage present at the cathode of the low power diode by a predetermined forward voltage, a signal is generated. This signal turns on a transistor acting as a switch, which in turn electronically connects the anode and the cathode of the low power diode together. Unlike conventional diodes that have a forward voltage (dependent on the physical silicon junction property of the diode) of approximately 0.7 Volts, this low power diode has a very small forward voltage (dependent on the drain to source resistance of the switch when on and the offset of the comparator) as low as 0.25 milliVolts.
摘要翻译： “二极管”的通用字典定义是“主要限制当前流向一个方向的任何电子设备”。该定义不仅覆盖了现有技术中已知的传统的两引线PN结半导体器件（本文中称为“常规二极管”），而且还涵盖本发明的电子器件（本文中称为“低功率二极管”）。低功率二极管具有用于比较存在于二极管的阳极和阴极处的电压的比较器。当比较器确定存在于低功率二极管的阳极处的电压等于或超过在低功率二极管的阴极处存在的预定正向电压时，产生信号。该信号导通用作开关的晶体管，其又将低功率二极管的阳极和阴极电连接在一起。与具有大约0.7伏的正向电压（取决于二极管的物理硅结特性）的传统二极管不同，这种低功率二极管具有非常小的正向电压（取决于开关的漏极和源极电阻，比较器的偏移）低至0.25毫伏。

63. 发明授权

US5446408A Method and apparatus for providing selectable sources of voltage 失效
公开(公告)号：US5446408A
公开(公告)日：1995-08-29
申请号：US249859
申请日：1994-05-26
申请人： Kerry D. Tedrow , Jahanshir J. Javanifard , Mase J. Taub
发明人： Kerry D. Tedrow , Jahanshir J. Javanifard , Mase J. Taub
IPC分类号： G11C5/14 , G11C16/30 , H03K17/52 , H03K17/74
CPC分类号： G11C16/30 , G11C5/143
摘要： An integrated circuit including an operating circuit portion which requires a predetermined voltage in order to function properly, a charge pump circuit for providing a high voltage output equal to the predetermined voltage from a lower voltage input, a terminal for receiving voltage from a source of external voltage, and a circuit for selectively providing voltage to the operating circuit portion of the integrated circuit from the terminal if the level of voltage detected at the terminal from the external voltage source is above the predetermined voltage and for providing voltage to the operating circuit portion from the output of the charge pump if the voltage detected at the terminal is less than the predetermined level.

64. 发明授权

US5315169A Power-efficient sample and hold circuit using bipolar transistors of single conductivity type 失效
标题翻译：采用单导电型双极晶体管的高效采样保持电路
公开(公告)号：US5315169A
公开(公告)日：1994-05-24
申请号：US894980
申请日：1992-06-08
申请人： Lloyd F. Linder , Benjamin Felder , Dwight D. Birdsall
发明人： Lloyd F. Linder , Benjamin Felder , Dwight D. Birdsall
IPC分类号： G11C27/02 , H03F3/50 , H03F3/72 , H03K17/00 , H03K17/74 , H03K5/24
CPC分类号： H03F3/50 , G11C27/026 , H03F3/72 , H03K17/74 , H03K2217/0036
摘要： A diode bridge includes a plurality of diodes for coupling an input voltage signal to a holding capacitor for sampling when the diodes are forward biased, and uncoupling the voltage signal from the capacitor for holding when the diodes are reverse biased. The diode bridge has first and second bias current nodes. A constant current drain causes a constant bias current to flow out of the bridge. A transistor connects the first node to the drain for forward biasing the diodes, whereas a transistor connects the second node to the drain for reverse biasing the diodes. A bootstrap amplifier (A2) produces a variable control voltage which controls a pair of voltage-controlled constant current sources to cause the constant bias current to flow therethrough into the bridge. A transistor (Q7) couples the control voltage to the first current source for forward biasing the diodes, whereas a transistor couples the control voltage to the second current source for reverse biasing the diodes. The transistors are all bipolar and of the same conductivity type, preferably NPN.
摘要翻译：二极管桥包括多个二极管，用于将输入电压信号耦合到保持电容器，用于当二极管正向偏置时进行采样，以及当二极管反向偏置时，将来自电容器的电压信号与电容器断开耦合以进行保持。二极管桥具有第一和第二偏置电流节点。恒流漏极导致恒定的偏置电流流出桥。晶体管将第一节点连接到漏极，用于正向偏置二极管，而晶体管将第二节点连接到漏极，以反向偏置二极管。自举放大器（A2）产生可变控制电压，其控制一对电压控制的恒流源，以使恒定的偏置电流流过其中。晶体管（Q7）将控制电压耦合到第一电流源以用于正向偏置二极管，而晶体管将控制电压耦合到第二电流源以反向偏置二极管。晶体管都是双极型的，具有相同的导电类型，最好是NPN。

65. 发明授权

US5089720A Bridge type switching circuit having a single switchable current source 失效
标题翻译：具有单个可切换电流源的桥式切换电路
公开(公告)号：US5089720A
公开(公告)日：1992-02-18
申请号：US542219
申请日：1990-06-21
申请人： Gilbert Gloaguen
发明人： Gilbert Gloaguen
IPC分类号： G11C27/02 , H03K17/74
CPC分类号： G11C27/024
摘要： A sample-and-hold circuit comprising a diode bridge that includes a first serial branch including first (T.sub.1) and second (D.sub.3) D.C. diodes connected in parallel with a second serial branch including third (T.sub.2) and fourth (D.sub.4) D.C. diodes. At least one end (B) common to the above two serial branches is connected to a first switchable current source (T.sub.3, T.sub.4, I) providing a sampling state in which the current source (I) is coupled to the first common end (B) and a blocking state in which it is uncoupled from the first common end (B). The first branch comprises an input terminal (E) for receiving an input voltage, and the second serial branch includes an output terminal (S) connected to a memory capacitor. In order to switch the bridge by means of a single current source, the third diode is constituted by the base-emitter path of a first transistor (T.sub.2) whose collector is connected to a supply voltage source. The second common end (A) of said two branches is now the junction point of the first (T.sub.1) and third (T.sub.2) diodes and a first resistor (R) is inserted between the second common end (A) and the supply voltage source (V.sub.cc). The first switchable current source is connected to the second common end (A) in the blocking state.
摘要翻译：一种采样和保持电路，包括二极管桥，该二极管桥包括第一串联支路，该第一串联支路包括与包括第三（T2）和第四（D4）直流二极管的第二串联支路并联连接的第一（T1）和第二（D3）直流二极管。上述两个串行分支共用的至少一个端（B）连接到提供采样状态的第一可切换电流源（T3，T4，I），其中电流源（I）耦合到第一公共端（B ）和从第一公共端（B）分离的阻塞状态。第一分支包括用于接收输入电压的输入端子（E），第二串行支路包括连接到存储电容器的输出端子（S）。为了通过单个电流源切换桥，第三二极管由第一晶体管（T2）的基极 - 发射极路径构成，其集电极连接到电源电压源。所述两个分支的第二公共端（A）现在是第一（T1）和第三（T2）二极管的连接点，并且第一电阻器（R）插入在第二公共端（A）和电源电压源（Vcc）。第一可切换电流源以阻塞状态连接到第二公共端（A）。

66. 发明授权

US4949171A Commutation grid 失效
标题翻译：换向网格
公开(公告)号：US4949171A
公开(公告)日：1990-08-14
申请号：US275387
申请日：1988-11-23
申请人： Gerard Grandmougin
发明人： Gerard Grandmougin
IPC分类号： H03K17/00 , H03K17/74 , H04H20/63 , H04N5/268 , H04Q3/52
CPC分类号： H04N5/268 , H04H20/63 , H04H20/10 , Y10T307/74
摘要： A commutation grid in which any of N input signals can be output to any of M outputs. The input signals are fed to an input card which passes the input signals to an output card via a commutation card. These card elements are supported in a rack system which allows each card to make an appropriate contact with any other card. A user is also permitted to issue a command order which controls the operation of the communication card.
摘要翻译：一个换向网格，其中N个输入信号中的任何一个可输出到M个输出中的任何一个。输入信号被馈送到通过换向卡将输入信号传递到输出卡的输入卡。这些卡元件支持在机架系统中，其允许每个卡片与任何其他卡片进行适当的联系。还允许用户发出控制通信卡的操作的命令命令。

67. 发明授权

US4937472A Sampling-holding circuit with high sampling frequency 失效
标题翻译：取样频率高的取样保持电路
公开(公告)号：US4937472A
公开(公告)日：1990-06-26
申请号：US103688
申请日：1987-10-02
申请人： Philippe Martin , Jean-Pierre Polonovski
发明人： Philippe Martin , Jean-Pierre Polonovski
IPC分类号： G11C27/02 , H03K17/74
CPC分类号： H03K17/74 , G11C27/024
摘要： An ultra-fast sample-and-hold circuit for the processing of analog signals comprises a diodes bridge: an input signal VE is applied to the input point and copied at the output point; the output signal is memorized in a capacitance. At the midpoints of the bridge, two current sources are applied. The voltages at the midpoints are servo-linked, in the hold mode, to the output voltage by means of a voltage follower and diodes mounted diagonally across the bridge, the two switches of the current sources being controlled by a signal clock signal. It is applied to signal processing chains in instrumentation, radar and telecommunications.
摘要翻译：用于处理模拟信号的超快速采样保持电路包括二极管桥：将输入信号VE施加到输入点并在输出点复制; 输出信号被存储在电容中。在桥梁的中点，应用两个电流源。中点处的电压在保持模式下通过电压跟随器和对角跨过桥安装的二极管伺服连接，电流源的两个开关由信号时钟信号控制。适用于仪表，雷达和电信等信号处理链。

68. 发明授权

US4748351A Power MOSFET gate driver circuit 失效
标题翻译：功率MOSFET栅极驱动电路
公开(公告)号：US4748351A
公开(公告)日：1988-05-31
申请号：US900578
申请日：1986-08-26
申请人： Farhad Barzegar
发明人： Farhad Barzegar
IPC分类号： H03K17/687 , H03K17/16 , H03K17/691 , H03K17/74 , H03K3/33
CPC分类号： H03K17/691
摘要： A MOSFET gate driver circuit reduces the noise susceptibility of a MOSFET switch by utilizing dual drive paths to apply turn-on and turn-off bias signals to the gate of the MOSFET. Drive pulses are coupled to the MOSFET switch via a pulse transformer which has two serially connected secondary windings. Turn-on pulses are coupled by a diode from the first secondary to the MOSFET gate. Turn-off pulses are coupled via the second secondary to a control MOSFET which is turned on by a turn-off pulse and remains on in order to keep the gate of the MOSFET switch to a hold off voltage.
摘要翻译： MOSFET栅极驱动器电路通过利用双驱动路径将MOSFET开关的噪声敏感性降低到MOSFET的栅极，从而将导通和关断偏置信号施加于MOSFET的栅极。驱动脉冲通过具有两个串联连接的次级绕组的脉冲变压器耦合到MOSFET开关。导通脉冲由二极管从第一次级耦合到MOSFET栅极。关断脉冲经由第二次级耦合到控制MOSFET，该控制MOSFET由关断脉冲导通，并保持导通，以便将MOSFET开关的栅极保持为截止电压。

69. 发明授权

US4746821A Constant phase limiting independent of input signal amplitude 失效
标题翻译：恒定相位限制独立于输入信号幅度
公开(公告)号：US4746821A
公开(公告)日：1988-05-24
申请号：US829626
申请日：1986-02-14
申请人： David E. Norton
发明人： David E. Norton
IPC分类号： H03G11/02 , H03K5/08 , H03K3/26 , H03K17/74
CPC分类号： H03G11/02
摘要： A constant phase diode limiter has a pair of oppositely poled diodes in series between the primary of an output transformer and an input terminal. The junction of the diodes is connected to a voltage source through a resistor and inductor. A capacitor having the same value as the capacitance of each of the diodes when nonconducting is connected between the input and the secondary winding of the output transformer. The secondary winding of the output transformer is connected in series between the output terminal and the latter capacitor.
摘要翻译：恒定二极管限制器在输出变压器的初级和输入端之间串联一对相对极化的二极管。二极管的接点通过电阻和电感连接到电压源。当在输出变压器的输入和次级绕组之间连接非导体时，具有与每个二极管的电容相同值的电容器。输出变压器的次级绕组串联在输出端子和后一个电容器之间。

70. 发明授权

US4742249A RF switch with diode network and control latch sharing common element 失效
标题翻译： RF开关具有二极管网络和控制锁存共享元件
公开(公告)号：US4742249A
公开(公告)日：1988-05-03
申请号：US934965
申请日：1986-11-25
申请人： Feroz K. Alpaiwalla , Robert H. Begeman
发明人： Feroz K. Alpaiwalla , Robert H. Begeman
IPC分类号： H03K3/286 , H03K17/74 , H03K17/76 , H03K17/60
CPC分类号： H03K3/286 , H03K17/74 , H03K17/76
摘要： A diode network includes a series branch coupled between two signal ports and a shunt branch coupled between a node in the series branch and ground and connected in parallel with a transistor of a latching circuit that is further coupled to supply forward bias to the shunt branch and reverse bias to the series branch when the transistor is conductive for blocking RF signal flow between the ports. The bias applied to the branches is reversed when the latch transistor is non-conductive thereby enabling RF signal flow between the ports. The transistor provides plural functions of establishing positive feedback for the latch, supplying forward and reverse bias to the shunt and series branches, respectively, and enhancing the attenuation of the shunt branch when conductive.
摘要翻译：二极管网络包括耦合在两个信号端口之间的串联支路和耦合在串联支路中的节点和地之间的并联并与锁存电路的晶体管并联连接的并联支路的并联支路，该晶体管进一步耦合以向分路支路提供正向偏置，当晶体管导通以阻止端口之间的RF信号流动时，反向偏置到串联支路。当锁存晶体管不导通时，施加到分支的偏置反转，从而使得能够在端口之间的RF信号流动。晶体管提供了多种功能，为锁存器建立正反馈，分别向分路和串联支路提供正向和反向偏置，并在导通时增强分路支路的衰减。

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