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公开(公告)号：US5508602A
公开(公告)日：1996-04-16
申请号：US128791
申请日：1993-09-28
CPC分类号： H02M3/156
摘要： A power supply in which control of the switch-on instant of a power device of a boost-circuit (operating in a discontinuous mode) is implemented by monitoring the current which actually flows through the "fly-back" inductance. The current is monitored on a sensing resistance, and, by the use of a comparator, a signal is produced for enabling/disabling the transfer to an input of a PWM driving circuit of a switch-on signal produced by a null detector. This configuration provide good noise immunity, which is particularly useful in power-factor-correction applications, and reduced power dissipation.
摘要翻译： 通过监视实际上流过“回飞”电感的电流来实现对升压电路的功率器件的接通瞬间（以不连续模式操作）的控制的电源。 在感测电阻上监视电流，并且通过使用比较器，产生用于使能/禁止向由空检测器产生的接通信号的PWM驱动电路的输入的传输的信号。 这种配置提供了良好的抗噪声能力，这在功率因数校正应用中特别有用，并降低了功耗。
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2.发明授权Circuit for detecting voltage variations in relation to a set value, for devices comprising error amplifiers 失效用于检测与设定值相关的电压变化的电路，用于包括误差放大器的装置
公开(公告)号：US5589759A
公开(公告)日：1996-12-31
申请号：US100482
申请日：1993-07-30
IPC分类号： G01R19/12 , G01R19/165 , H02M3/156 , G05F1/63
CPC分类号： H02M3/156
摘要： A circuit for detecting voltage variations in relation to a set value, for devices, such as a power supply circuit, comprising an error amplifier fed back by a compensating capacitor which, under steady state operating conditions, is not supplied with current, and, in the presence of transient output voltage (V.sub.o) of the device, is supplied with current (DI) proportional to the variation in voltage, the circuit comprising a current sensor connected to the compensating capacitor for detecting the current (DI) through the same; and the output signal of the sensor preferably being supplied to a circuit for limiting the variation in output voltage which, in the event the voltage variation exceeds a given threshold value (V.sub.R1), activates a control stage connected to the output of the device.
摘要翻译： 一种用于检测与设定值相关的电压变化的电路，用于诸如电源电路的装置，包括由在补偿电容器反馈的误差放大器，所述补偿电容器在稳态工作条件下不被提供电流，并且在 提供器件的瞬态输出电压（Vo）的存在与电压变化成比例的电流（DI），该电路包括连接到补偿电容器的电流传感器，用于检测通过该电流的电流（DI）; 并且传感器的输出信号优选地被提供给用于限制输出电压变化的电路，其在电压变化超过给定阈值（VR1）的情况下激活连接到装置的输出的控制级。
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