公开(公告)号：US20060194353A1

公开(公告)日：2006-08-31

申请号：US11325076

申请日：2006-01-04

申请人： Philipp Spuhler ,  Bert Vermeire ,  James Hofmeister

发明人： Philipp Spuhler ,  Bert Vermeire ,  James Hofmeister

IPC分类号： H01L21/66

CPC分类号： G01R31/048 ,  G01R31/2884 ,  G01R31/312

摘要： The solder-joint integrity of digital electronic packages, such as FPGAs or microcontrollers that have internally connected input/output buffers, is evaluated by applying a time-varying voltage through one or more solder-joint networks to charge a charge-storage component. Each network includes an I/O buffer on the die in the package and a solder-joint connection, typically one or more such connections inside the package and between the package and a board. The time constant for charging the component is proportional to the resistance of the solder-joint network, hence the voltage across the charge-storage component is a measurement of the integrity of the solder-joint network.

公开(公告)号：US20060191889A1

公开(公告)日：2006-08-31

申请号：US11350446

申请日：2006-02-09

申请人： James Hofmeister ,  Philipp Spuhler ,  Bert Vermeire

发明人： James Hofmeister ,  Philipp Spuhler ,  Bert Vermeire

IPC分类号： H05B3/42 ,  H05B1/00

CPC分类号： G01R31/048 ,  B23K1/0016 ,  B23K2101/40 ,  G01R31/2884 ,  H01L2224/16225 ,  H01L2924/00011 ,  H01L2924/00014 ,  H01L2924/15311 ,  H01L2224/0401

摘要： A solder-joint detection circuit uses a resistive bridge and a differential detector to detect faults in the solder-joint network both inside and outside the digital electronic package during operation. The resistive bridge is preferably coupled to a high supply voltage used to power the package. Resistors R1 and R2 are connected in series at a first junction between the high and low supply voltages and a resistor R3 is coupled to the high supply voltage and connected in series with the resistance of the solder-network at a second junction. The network is held at a low voltage on the die. The detector compares the sensitivity and detection voltages and outputs a Pass/Fail signal for the solder-joint network.

摘要翻译： 焊接检测电路使用电阻桥和差分检测器来检测数字电子封装内部和外部的焊点网络中的故障。 电阻桥优选地耦合到用于为封装供电的高电源电压。 电阻器R 1和R 2在高电源电压和低电源电压之间的第一连接处串联连接，并且电阻器R 3耦合到高电源电压并且在第二连接处与焊料网络的电阻串联连接。 网络在模具上保持低电压。 检测器比较灵敏度和检测电压，并输出焊点网络的通过/失败信号。

公开(公告)号：US20120153917A1

公开(公告)日：2012-06-21

申请号：US13332343

申请日：2011-12-20

申请人： Philippe C. Adell ,  Bertan Bakkaloglu ,  Bert Vermeire ,  Tao Liu

发明人： Philippe C. Adell ,  Bertan Bakkaloglu ,  Bert Vermeire ,  Tao Liu

IPC分类号： G05F1/46

CPC分类号： H02M3/1588 ,  H02M2001/0009 ,  H02M2001/0012 ,  Y02B70/1466

摘要： A DC-DC converter for generating a DC output voltage includes: a digitally controlled pulse width modulator (DPWM) for controlling a switching power stage to supply a varying voltage to an inductor; and a digital voltage feedback circuit for controlling the DPWM in accordance with a feedback voltage corresponding to the DC output voltage, the digital voltage feedback circuit including: a first voltage controlled oscillator for converting the feedback voltage into a first frequency signal and to supply the first frequency signal to a first frequency discriminator; a second voltage controlled oscillator for converting a reference voltage into a second frequency signal and to supply the second frequency signal to a second frequency discriminator; a digital comparator for comparing digital outputs of the first and second frequency discriminators and for outputting a digital feedback signal; and a controller for controlling the DPWM in accordance with the digital feedback signal.

摘要翻译： 用于产生DC输出电压的DC-DC转换器包括：数字控制脉宽调制器（DPWM），用于控制开关功率级以向电感器提供变化的电压; 以及数字电压反馈电路，用于根据对应于直流输出电压的反馈电压来控制DPWM，所述数字电压反馈电路包括：第一压控振荡器，用于将反馈电压转换为第一频率信号并提供第一 频率信号到第一鉴频器; 第二压控振荡器，用于将参考电压转换为第二频率信号，并将第二频率信号提供给第二频率鉴别器; 数字比较器，用于比较第一和第二鉴频器的数字输出并输出数字反馈信号; 以及用于根据数字反馈信号控制DPWM的控制器。

公开(公告)号：US09024606B2

公开(公告)日：2015-05-05

申请号：US13332343

申请日：2011-12-20

申请人： Philippe C. Adell ,  Bertan Bakkaloglu ,  Bert Vermeire ,  Tao Liu

发明人： Philippe C. Adell ,  Bertan Bakkaloglu ,  Bert Vermeire ,  Tao Liu

IPC分类号： H02M3/157 ,  H02M3/158 ,  H02M1/00

CPC分类号： H02M3/1588 ,  H02M2001/0009 ,  H02M2001/0012 ,  Y02B70/1466

摘要： A DC-DC converter for generating a DC output voltage includes: a digitally controlled pulse width modulator (DPWM) for controlling a switching power stage to supply a varying voltage to an inductor; and a digital voltage feedback circuit for controlling the DPWM in accordance with a feedback voltage corresponding to the DC output voltage, the digital voltage feedback circuit including: a first voltage controlled oscillator for converting the feedback voltage into a first frequency signal and to supply the first frequency signal to a first frequency discriminator; a second voltage controlled oscillator for converting a reference voltage into a second frequency signal and to supply the second frequency signal to a second frequency discriminator; a digital comparator for comparing digital outputs of the first and second frequency discriminators and for outputting a digital feedback signal; and a controller for controlling the DPWM in accordance with the digital feedback signal.

摘要翻译： 用于产生DC输出电压的DC-DC转换器包括：数字控制脉宽调制器（DPWM），用于控制开关功率级以向电感器提供变化的电压; 以及数字电压反馈电路，用于根据对应于直流输出电压的反馈电压来控制DPWM，所述数字电压反馈电路包括：第一压控振荡器，用于将反馈电压转换为第一频率信号并提供第一 频率信号到第一鉴频器; 第二压控振荡器，用于将参考电压转换为第二频率信号，并将第二频率信号提供给第二频率鉴别器; 数字比较器，用于比较第一和第二鉴频器的数字输出并输出数字反馈信号; 以及用于根据数字反馈信号控制DPWM的控制器。