-
公开(公告)号：US4903182A
公开(公告)日：1990-02-20
申请号：US325751
申请日：1989-03-20
IPC分类号： H02M3/28 , H02M3/338 , H03K17/0412
CPC分类号： H03K17/04123 , H02M3/3385
摘要： A self oscillating converter with regenerative switching includes circuitry to enhance the gain of circuity to turn off a MOSFET power switch and enhance the regenerative action culminating in turn off in order to eliminate bursting at low loads. The MOSFET power switching device turn off circuitry includes the addition of a supplementary drive transistor operative for counteracting the effects of the parasitic capacitances of the MOSFET power switching device. This permits the converter to operate with the shorter on times and to provide a low ripple output at very low load.
-
公开(公告)号：US4419723A
公开(公告)日：1983-12-06
申请号：US316496
申请日：1981-10-29
CPC分类号： G05F1/38 , H02M3/33561
摘要： A multiple-output DC-DC converter has an electronically controllable reactor (64,66) connected in series with each output circuit. In response to variations in voltage of the output circuits (80,82), control signals are fed back to vary the permeance of the electronically controllable reactor (64,66) in each output circuit. The voltage in any output circuit is thereby made independent of input voltage variations and load fluctuations in any other output circuit.
摘要翻译： 多输出DC-DC转换器具有与每个输出电路串联连接的电子可控电抗器（64,66）。 响应于输出电路（80,82）的电压变化，控制信号被反馈以改变每个输出电路中电子可控电抗器（64,66）的磁导。 因此，任何输出电路中的电压独立于任何其它输出电路中的输入电压变化和负载波动。
-
公开(公告)号：US4220987A
公开(公告)日：1980-09-02
申请号：US974381
申请日：1978-12-29
IPC分类号： H02M3/335
CPC分类号： H02M3/33507
摘要： A power converter circuit is disclosed utilizing pulse width modulation for power regulation. A rapid acting surge protection circuit for the power driving switch is operated from a string of zener diodes to disable the power switch. A base charge removal circuit is included for dissipating accumulated base charges on the driving transistor without the need for a bipolar driving signal for the power transistor.
摘要翻译： 公开了一种功率转换器电路，利用用于功率调节的脉冲宽度调制。 用于电力驱动开关的快速动作浪涌保护电路由一串齐纳二极管操作以禁用电源开关。 包括基极电荷去除电路，用于耗散驱动晶体管上累积的基极电荷，而不需要用于功率晶体管的双极驱动信号。
-
公开(公告)号：US06832182B1
公开(公告)日：2004-12-14
申请号：US09937960
申请日：2001-09-28
IPC分类号： G06F1750
CPC分类号： G06F11/261 , G06F17/5036
摘要： An electronic circuit simulator technique dramatically reduces barriers to simulation of complex analog circuits. The simulator technique reduces simulation preparation time by permitting a skilled user to formulate a simulation strategy that can combine a modeling strategy, a deck extraction strategy, and a comprehensive suite of pre-engineered simulation tests that fully characterize a system under test. The simulation technique reduces the CPU time required for each test by allowing a skilled user to encode a device modeling strategy and a deck extraction strategy that effectively minimize the CPU time required to achieve a given simulation objective. For a given simulation objective, a skilled user chooses for each element implemented in a simulation a device model of minimum complexity that achieves a desired level of simulation accuracy and extracts a portion of the complete production schematic that achieves the desired level of simulation accuracy.
摘要翻译： 电子电路仿真技术大大减少了复杂模拟电路仿真的障碍。 模拟器技术通过允许熟练的用户制定模拟策略来减少模拟准备时间，该模拟策略可以组合建模策略，甲板提取策略以及完整表征被测系统的全套模拟测试。 模拟技术通过允许熟练用户对设备建模策略和甲板提取策略进行编码，从而有效地最小化实现给定模拟目标所需的CPU时间，从而减少每个测试所需的CPU时间。 对于给定的模拟目标，熟练的用户选择在模拟中实现的最小复杂度的设备模型中的每个元件，其实现期望的仿真精度水平并且提取实现期望的仿真精度水平的完整生产示意图的一部分。
-
公开(公告)号：US4254443A
公开(公告)日：1981-03-03
申请号：US974382
申请日：1978-12-29
IPC分类号： H02H7/127 , H02M3/335 , H03K17/0814 , H02H3/20
CPC分类号： H02H7/127 , H02M3/33507 , H03K17/08146
摘要： A power converter circuit is disclosed utilizing pulse width modulation for power regulation. A rapid acting surge protection circuit for the power driving switch is operated from a string of zener diodes to disable the power switch. A base charge removal circuit is included for removing accumulated base charges on the driving transistor without the need for a bipolar driving signal for the power transistor.
摘要翻译： 公开了一种功率转换器电路，利用用于功率调节的脉冲宽度调制。 用于电力驱动开关的快速动作浪涌保护电路由一串齐纳二极管操作以禁用电源开关。 包括基极电荷去除电路，用于去除驱动晶体管上累积的基极电荷，而不需要用于功率晶体管的双极驱动信号。
-
6.发明授权Start-up transient control for a DC-to-DC converter powered by a current-limited source 失效由受限电源供电的DC-DC转换器的启动瞬态控制
公开(公告)号：US4504898A
公开(公告)日：1985-03-12
申请号：US501298
申请日：1983-06-06
CPC分类号： H02M1/36 , Y10S323/901
摘要： The start-up trajectory of the operating point of a DC-to-DC converter normally includes a high current locus which must be traversed to reach the steady-state operating point. In the case of a converter powered by a current-limited source, such as a power supply system where one converter powers a plurality of subsequent converters, the subsequent converters may be unable to turn on due to inadequate current drive. By using a control circuit adapted to control the start-up trajectory of a DC-to-DC converter as a continuous function of the input voltage applied to it by the current-limited source, the start-up characteristics are constrained to be compatible to both source and load permitting the converter to proceed to its steady-state operating point.
摘要翻译： DC-DC转换器的工作点的启动轨迹通常包括必须穿过的高电流轨迹才能达到稳态工作点。 在由限流源（例如其中一个转换器为多个后续转换器供电的电源系统）供电的转换器的情况下，随后的转换器可能由于电流驱动不足而不能接通。 通过使用适于控制DC-DC转换器的启动轨迹作为由限流源施加到其的输入电压的连续函数的控制电路，启动特性被限制为与 源和负载允许转换器进入其稳态工作点。
-
公开(公告)号：US4255721A
公开(公告)日：1981-03-10
申请号：US974383
申请日：1978-12-29
IPC分类号： H03K3/0231 , H03K3/295
CPC分类号： H03K3/0231
摘要： A high stability integratable resistance-capacitance oscillator is disclosed which is capable of operating at a stable frequency regardless of changes in ambient temperature or applied voltages. The oscillator uses a temperature compensating impedance and semiconductor junction to compensate for temperature dependent variations in active elements of the oscillator. Constant current bias sources and voltage clamping circuits insure oscillations having predetermined amplitude ranges despite changes in applied voltages. Active transistors in the oscillator are maintained in their linear range by the use of antisaturation transistors connected between their base and collector electrodes.
摘要翻译： 公开了一种高稳定度的可积分电阻电容振荡器，其能够以恒定的频率工作，而不管环境温度或施加电压的变化。 振荡器使用温度补偿阻抗和半导体结来补偿振荡器有效元件中温度相关的变化。 恒定电流偏置源和电压钳位电路确保具有预定幅度范围的振荡，尽管施加的电压有变化。 振荡器中的有源晶体管通过使用连接在其基极和集电极之间的抗饱和晶体管而保持在线性范围内。
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.013 秒)
