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1. 发明授权

US5841313A Switch with programmable delay 失效
标题翻译：切换可编程延迟
公开(公告)号：US5841313A
公开(公告)日：1998-11-24
申请号：US682153
申请日：1996-07-17
申请人： Gedaly Levin , Christopher J. Sanzo , Arthur R. Theroux , George E. Schuellein , Richard Patch
发明人： Gedaly Levin , Christopher J. Sanzo , Arthur R. Theroux , George E. Schuellein , Richard Patch
IPC分类号： H02M3/335 , H03K17/0812 , H03K17/284 , H03K17/687 , H03K17/296 , G05F1/40
CPC分类号： H03K17/08126 , H02M3/33561 , H02M3/33592 , H03K17/284 , H03K17/6877 , H02M2001/0032 , H02M2001/009 , Y02B70/1475 , Y02B70/16
摘要： A programmable delay circuit employs a comparator to control an output driver. The comparator compares a ramp signal with a disable signal or an error control signal derived from an error amplifier. The comparator latches the output on until a reset signal is received. The reset signal is produced when the ramp signal is discharged below a predetermined level. The programmable delay circuit is useful in a secondary side post regulator to control a grounded totem pole driver. The totem pole driver in turn controls a switching device coupled to a voltage on a secondary winding.
摘要翻译：可编程延迟电路采用比较器来控制输出驱动器。比较器将斜坡信号与禁用信号或从误差放大器导出的误差控制信号进行比较。比较器锁存输出，直到接收到复位信号。当斜坡信号放电到预定电平以下时产生复位信号。可编程延迟电路在次级侧稳压器中用于控制接地图腾柱驱动器。图腾柱驱动器又控制耦合到次级绕组上的电压的开关装置。

2. 发明授权

US5793241A High speed active op-amp clamp 失效
标题翻译：高速有源运算放大器钳位
公开(公告)号：US5793241A
公开(公告)日：1998-08-11
申请号：US699770
申请日：1996-08-20
申请人： Christopher Sanzo , Richard Patch
发明人： Christopher Sanzo , Richard Patch
IPC分类号： H03K5/13 , H03K5/08
CPC分类号： H03K5/13
摘要： An op amp clamp for charging or discharging a capacitor prevents the voltage on the capacitor from going beyond a reference voltage determined by a reference clamp voltage applied to an input of a differential amplifier. The second input of the differential amplifier is connected to the capacitor. The output of the differential amplifier is provided in a feedback loop to the capacitor. The feedback loop includes a charging circuit or a discharging circuit depending upon the function of the op amp clamp. The feedback loop may be arranged with a current mirror in which current generated by the output of the differential amplifier is mirrored in the charging or discharging circuit. A signal to activate charging or discharging is applied at the output of the differential amplifier to activate or deactivate the current mirror.
摘要翻译：用于对电容器进行充电或放电的运算放大器钳位器可防止电容器上的电压超过由施加到差分放大器的输入端的参考钳位电压确定的参考电压。差分放大器的第二个输入端连接到电容器。差分放大器的输出在电容器的反馈回路中提供。反馈回路包括充电电路或取决于运算放大器钳位功能的放电电路。反馈回路可以配置有电流镜，其中由差分放大器的输出产生的电流被镜像在充电或放电电路中。在差分放大器的输出处施加用于激活充电或放电的信号以激活或去激活电流镜。

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