公开(公告)号：US09385649B2

公开(公告)日：2016-07-05

申请号：US14290665

申请日：2014-05-29

申请人： QUALCOMM INCORPORATED

发明人： Le Wang ,  Arash Mehrabi

IPC分类号： H03K3/26 ,  H03B5/04 ,  H03B5/20 ,  H04B5/04 ,  H03K3/30 ,  H03K3/0231 ,  H03K4/50

CPC分类号： H03B5/04 ,  H03B5/20 ,  H03K3/0231 ,  H03K3/30 ,  H03K4/50 ,  H04B5/04

摘要： Cancelling a delay in a comparator of an RC oscillator configured to generate a clock pulse, including: selectively coupling a plurality of current sources to a first capacitor, a second capacitor, and a resistor, wherein the plurality of current source charge and discharge the first capacitor and the second capacitor, and charge the resistor; charging the first capacitor at a higher rate during a first phase of the clock pulse than a second phase of the clock pulse, and charging the second capacitor at a higher rate during a third phase of the clock pulse than a fourth phase of the clock pulse; and generating the clock pulse by enabling the comparator to compare a voltage on the first or second capacitor with a voltage on the resistor.

摘要翻译： 取消被配置为产生时钟脉冲的RC振荡器的比较器中的延迟，包括：选择性地将多个电流源耦合到第一电容器，第二电容器和电阻器，其中所述多个电流源对第一 电容器和第二电容器，并对电阻充电; 在时钟脉冲的第一相位期间以比时钟脉冲的第二相位更高的速率对第一电容器充电，并且在时钟脉冲的第三相位期间以比时钟脉冲的第四相位更高的速率对第二电容器充电 ; 并通过使比较器将第一或第二电容器上的电压与电阻器上的电压进行比较来产生时钟脉冲。

公开(公告)号：US6137235A

公开(公告)日：2000-10-24

申请号：US362908

申请日：1999-07-29

申请人： Felix Franck

发明人： Felix Franck

IPC分类号： H02M7/5383 ,  H03K3/30 ,  H05B41/282 ,  H05B37/02

CPC分类号： H03K3/30 ,  H02M7/53832 ,  H05B41/2825 ,  H02M2001/0048 ,  Y02B70/1491 ,  Y10S315/05 ,  Y10S315/07

摘要： The invention relates to optimized-loss base drive for a bipolar transistor bridge oscillator circuit, by using base series capacitors and by not hng any non-reactive resistances in the base drive circuits.

摘要翻译： 本发明涉及双极晶体管桥式振荡器电路的优化损耗基极驱动，通过使用基极串联电容器和在基极驱动电路中不具有任何非反应电阻。

公开(公告)号：US5623171A

公开(公告)日：1997-04-22

申请号：US573863

申请日：1995-12-18

申请人： Shin Nakajima

发明人： Shin Nakajima

IPC分类号： B03C3/66 ,  B03C3/68 ,  H02M9/04 ,  H03K3/55 ,  H03K3/57 ,  H03K17/80 ,  H03K3/30 ,  B03C3/02

CPC分类号： H03K17/80 ,  B03C3/68 ,  H03K3/55 ,  H03K3/57

摘要： A high-voltage pulse generating circuit of a charge transfer-type comprising a main capacitor for storing input energy and at least one magnetic pulse compression circuit comprising a saturable reactor, a saturable reactor on the side of a load comprising an energy recovery winding connected to the main capacitor via a rectifying element for returning unconsumed pulse energy from the load to the main capacitor. This circuit is suitable for an electrostatic precipitator.

摘要翻译： 一种电荷转移型的高电​​压脉冲发生电路，包括用于存储输入能量的主电容器和至少一个包含可饱和电抗器的磁脉冲压缩电路，负载侧的可饱和电抗器包括连接到 主电容器经由整流元件，用于将未消耗的脉冲能量从负载返回到主电容器。 该电路适用于静电除尘器。

公开(公告)号：US5510681A

公开(公告)日：1996-04-23

申请号：US227999

申请日：1994-04-15

申请人： Ole K. Nilssen

发明人： Ole K. Nilssen

IPC分类号： H02M7/5383 ,  H02M7/53846 ,  H02M7/53862 ,  H02M7/5387 ,  H03K3/30 ,  H05B41/24 ,  H05B41/28 ,  H05B41/282 ,  H05B41/295 ,  H05B41/38 ,  H05B41/392 ,  H05B37/02

CPC分类号： H02M7/53862 ,  H02M7/53832 ,  H02M7/53835 ,  H02M7/53846 ,  H02M7/53873 ,  H03K3/30 ,  H05B41/245 ,  H05B41/28 ,  H05B41/2827 ,  H05B41/295 ,  H05B41/38 ,  H05B41/3925 ,  Y10S315/05 ,  Y10S315/07

摘要： A half-bridge inverter is powered from a constant-magnitude DC supply voltage and provides at the inverter's output a first AC output voltage that is describable as a modified squarewave voltage. This first AC voltage is applied across a series-combination of an inductor and a capacitor, the junction between which is clamped to the DC supply voltage. As a result, a second AC voltage gets established across the capacitor; which second AC voltage is also describable as being a modified squarewave voltage. However, the phasing of the second AC voltage is delayed by approximately 90 degrees with respect to the first AC voltage; which results in the voltage across the inductor being of approximately sinusoidal waveform. A fluorescent lamp is connected in series with a ballast capacitor; and the lamp-capacitor series combination is connected across the inductor, thereby resulting in a nearly sinusoidal current being provided to the fluorescent lamp. Lamp starting aid is provided by a voltage-doubling circuit supplying a high-magnitude current-limited DC voltage across the ballast capacitor for ignition purposes.

摘要翻译： 半桥逆变器由恒定直流电源电压供电，并在变频器的输出端提供可被描述为改进的方波电压的第一交流输出电压。 该第一交流电压被施加在电感器和电容器的串联组合上，其结点被钳位到直流电源电压。 结果，跨越电容器建立了第二交流电压; 该第二AC电压也可被描述为改进的方波电压。 然而，相对于第一AC电压，第二AC电压的定相延迟大约90度; 这导致电感器两端的电压大致为正弦波形。 荧光灯与镇流电容串联; 并且灯电容器串联组合连接在电感器两端，从而导致向荧光灯提供近似正弦电流。 灯起动辅助由提供高压限流直流电压的电压倍增电路提供，用于点火目的。

公开(公告)号：US5304863A

公开(公告)日：1994-04-19

申请号：US939562

申请日：1992-09-02

申请人： Donald R. Cargille

发明人： Donald R. Cargille

IPC分类号： H03K17/687 ,  H03K17/691 ,  H03K3/45 ,  H03K3/30

CPC分类号： H03K17/691 ,  H03K17/6877

摘要： A transformer driver having an unlimited duty cycle capability is disclosed herein. The transformer driver 10 of the present invention is coupled to an output circuit 20 and includes a transformer 32 having primary winding and secondary windings 30 and 34. The inventive driver 10 further includes a generator 26 for applying a plurality of charging pulses P1, P2 to the primary transformer winding 30 to keep the transformer from being saturated. A transistor buffer network 36 selectively electrically isolates the output circuit 20 from the transformer. In a particular embodiment the charging pulses P1, P2 serve to maintain the voltage at the control terminal 38 of a power transistor included within the output circuit.

摘要翻译： 本文公开了具有无限占空比能力的变压器驱动器。 本发明的变压器驱动器10耦合到输出电路20，并且包括具有初级绕组和次级绕组30和34的变压器32.本发明的驱动器10还包括用于将多个充电脉冲P1，P2施加到 主变压器绕组30保持变压器饱和。 晶体管缓冲器网络36选择性地将输出电路20与变压器隔离。 在特定实施例中，充电脉冲P1，P2用于维持包括在输出电路内的功率晶体管的控制端子38处的电压。

公开(公告)号：US4812959A

公开(公告)日：1989-03-14

申请号：US52673

申请日：1987-05-20

申请人： Carleton D. Driscoll ,  Elie M. Najm ,  Manfred Waechter

发明人： Carleton D. Driscoll ,  Elie M. Najm ,  Manfred Waechter

IPC分类号： H02M3/28 ,  H02M3/335 ,  H02M3/338 ,  H03K3/30

CPC分类号： H03K3/30 ,  H02M3/33523 ,  H02M3/3385

摘要： A non-interfering power supply includes a free-running blocking oscillator power supply subsystem and a circuit arrangement that synchronizes the blocking oscillator power supply subsystem to operate at the horizontal operating frequency of a display subsystem. Synchronizing signals representative of the horizontal operating frequency of the display subsystem are generated and are used to activate the circuit arrangement that causes the blocking oscillator to change its mode of operation from free-running to a fully reset fixed frequency flyback converter. When activated, a switch in the circuit arrangement extends the off-time of a switching transistor in the blocking oscillator power supply control circuit. As a result, the oscillator is forced to run at an operating frequency lower than its free-running frequency.

公开(公告)号：US4572973A

公开(公告)日：1986-02-25

申请号：US456850

申请日：1983-01-10

申请人： Shigeru Tanaka

发明人： Shigeru Tanaka

IPC分类号： G01R19/15 ,  G01R19/165 ,  G01R29/027 ,  H02H3/08 ,  H03K5/19 ,  H05G1/66 ,  H03K5/153 ,  H03K3/30 ,  H03K5/159

CPC分类号： G01R19/16571 ,  G01R19/15 ,  G01R29/027 ,  H03K5/19 ,  H05G1/66

摘要： An AC current detection circuit is intended to detect whether an AC induction current for the rotor of the rotating anode X-ray tube flows or not. A current transformer is employed in the rotor supply circuit to generate a lower voltage at its output circuit by utilizing its magnetic-electric conversion effect. A transistor will switch on-off by receiving the generated voltage and produce a series of output pulse signals. A retriggerable monostable multivibrator will detect a missing pulse from the output pulse signals, which indicates a failure of the rotor supply operation.

摘要翻译： AC电流检测电路旨在检测旋转阳极X射线管的转子的AC感应电流是否流动。 在转子供应电路中采用电流互感器，通过利用其磁电转换效应在其输出电路产生较低的电压。 晶体管将通过接收所产生的电压并且产生一系列输出脉冲信号而导通。 可重触发的单稳态多谐振荡器将从输出脉冲信号中检测出缺失的脉冲，这表明转子供电操作失败。

公开(公告)号：US4307353A

公开(公告)日：1981-12-22

申请号：US103624

申请日：1979-12-14

申请人： Ole K. Nilssen

发明人： Ole K. Nilssen

IPC分类号： H02M7/5383 ,  H02M7/537 ,  H03K3/30

CPC分类号： H02M7/53835

摘要： An improved high efficiency push-pull inverter circuit employing a pair of switching transistors that are alternately triggered into conduction by a control circuit, for converting DC voltage into high frequency AC voltage. The control circuit includes a pair of saturable transformers that are non-coupled to each other and are each connected to the base of a respective transistor. The bases are isolated from ground potential by a capacitor, and significant reverse voltage signals are developed and alternately applied to the base of a conducting transistor for rapidly turning it off, thereby increasing device switching speed and overall efficiency of the circuit.

摘要翻译： 一种改进的高效率推挽逆变器电路，采用一对开关晶体管，其被控制电路交替地触发导通，用于将直流电压转换为高频交流电压。 控制电路包括彼此不耦合并且各自连接到相应晶体管的基极的一对可饱和变压器。 基极通过电容器与地电位隔离，并且显着的反向电压信号被发展并且交替地施加到导电晶体管的基极以快速地将其关断，从而提高器件切换速度和电路的整体效率。

公开(公告)号：US4184128A

公开(公告)日：1980-01-15

申请号：US890586

申请日：1978-03-20

申请人： Ole K. Nilssen

发明人： Ole K. Nilssen

IPC分类号： H02M7/5383 ,  H02M7/53846 ,  H02M7/53862 ,  H03K3/30 ,  H05B41/392 ,  H02M1/18 ,  H02M7/48 ,  H05B41/29

CPC分类号： H02M7/53862 ,  H02M7/53846 ,  H03K3/30 ,  H05B41/3925 ,  Y10S315/02

摘要： High efficiency push-pull inverters minimize undesirable energy losses usually resulting from simultaneous conduction and imperfect switching of the transistor switching means. In each of the disclosed circuits, a saturable inductor and a diode are connected in parallel and across the base-emitter junction of each transistor. Voltage on the base of each transistor causes its associated saturable inductor to saturate, and the saturated inductor then terminates the flow of base current and provides a path for rapid evacuation of the charge carriers stored in the transistor base-emitter junction in order to render the transistor rapidly non-conductive. Each diode provides a drain path for current continuing to flow through its associated saturable inductor after junction evacuation. A novel triggering means initiates oscillation of the inverters. Also disclosed are feedback means operable to prevent premature transistor conduction and a capacitor connected between the collectors of the inverter transistors operable to restrain the rate of change of transistor collector voltage, both of these features also serving to minimize energy dissipation.

摘要翻译： 高效率推挽逆变器最小化通常由于晶体管开关装置的同时导通和不完全切换导致的不期望的能量损失。 在每个公开的电路中，饱和电感器和二极管并联连接并跨越每个晶体管的基极 - 发射极结。 每个晶体管的基极上的电压导致其相关的可饱和电感饱和，然后饱和电感器终止基极电流，并提供用于快速排出存储在晶体管基极 - 发射极结中的电荷载流子的路径，以使 晶体管快速不导电。 每个二极管提供漏极通路，用于在连接抽真空之后，电流继续流过其相关的可饱和电感器。 一种新颖的触发装置启动逆变器的振荡。 还公开了可操作以防止过早的晶体管导通的反馈装置和连接在反相器晶体管的集电极之间的电容器可操作地抑制晶体管集电极电压的变化率，这两个特征也用于最小化能量耗散。

公开(公告)号：US4150307A

公开(公告)日：1979-04-17

申请号：US836092

申请日：1977-09-23

申请人： Richard S. Loucks

发明人： Richard S. Loucks

IPC分类号： G01S13/44 ,  H03K3/55 ,  H03K3/30 ,  H03K3/86

CPC分类号： G01S13/4409 ,  H03K3/55

摘要： A regulating charging circuit for the pulse-forming network in a line-type pulse modulator, such as commonly found in pulsed radar systems. A charging inductor is the primary of a transformer, the secondary of which is open-circuited until the resonant charge of the pulsed-forming network reaches a predetermined voltage. At that time, a sensor generates a trigger enabling a solid state device, of the thyristor genera, to connect the secondary of the charging inductor/transformer to a step-up network, including a second transformer. The output of the step-up network is fed through a diode into the filter/storage capacitor of the high voltage power supply from which the charging inductor draws current. The unused charging conductor energy is thereby recovered and used to help recharge the filter/storage capacitor. The combination including the step-up network relieves the thyristor and control circuits from the requirement of controlling high voltages.

摘要翻译： 一种线性脉冲调制器中的脉冲形成网络的调节充电电路，如脉冲雷达系统中常见的。 充电电感器是变压器的主要部分，其次级开路直到脉冲形成网络的谐振电荷达到预定电压。 此时，传感器产生触发器，使得晶闸管属的固态器件将充电电感器/变压器的次级连接到包括第二变压器的升压网络。 升压网络的输出通过二极管馈送到高压电源的滤波器/存储电容器中，充电电感从该电容器吸收电流。 因此，未使用的充电导体能量被恢复并用于帮助对过滤器/存储电容器进行再充电。 包括升压网络在内的组合可以缓解晶闸管和控制电路的高压控制。