公开(公告)号：US06958596B1

公开(公告)日：2005-10-25

申请号：US10686362

申请日：2003-10-15

申请人： Paul K. Sferrazza ,  Stanley F. Wietecha

发明人： Paul K. Sferrazza ,  Stanley F. Wietecha

IPC分类号： G05F5/00 ,  H02M1/36

CPC分类号： H02M1/36

摘要： The problem of charge leakage in the AC compensation filter for the error amplifier of a pulse width modulation (PWM)-based DC—DC converter is effectively obviated by controllably sampling and storing the voltage across the AC compensation filter, in response to a transition of the operation of a DC power supply from run or active mode to quiescent or sleep mode. The sampled voltage is retained as a compensation voltage throughout the quiescent mode, so that it will be immediately available to the PWM circuitry at the termination of the quiescent interval. This serves to ensure a relatively smooth (low noise) power supply switch-over during a subsequent transition from quiescent to active mode.

摘要翻译： 针对基于脉冲宽度调制（PWM）的DC-DC转换器的误差放大器的AC补偿滤波器中的电荷泄漏的问题通过可控地采样和存储跨越AC补偿滤波器的电压来响应于 将直流电源从运行或主动模式运行到静态或休眠模式。 采样电压在整个静态模式下保持为补偿电压，因此在静态间隔结束时，PWM电路将立即可用。 这用于确保在从静止到活动模式的后续过渡期间相对平滑（低噪声）电源切换。

公开(公告)号：US06700365B2

公开(公告)日：2004-03-02

申请号：US10304203

申请日：2002-11-26

申请人： Robert Haynes Isham ,  Paul K. Sferrazza

发明人： Robert Haynes Isham ,  Paul K. Sferrazza

IPC分类号： G05F1613

CPC分类号： H02M3/156 ,  G01R19/32 ,  G05F3/262 ,  H02M2001/0009

摘要： A programmably switched, multi-output stage current mirror-based, current-sensing and correction circuit controls the operation of a buck mode DC—DC converter. This correction circuit generates a correction current having a prescribed step-wise temperature-compensating relationship to sensed current. The sensed current is derived from a variable impedance controlled by a sense amplifier coupled via a current feedback resistor to the common output node between a high side power switching device and a low side power switching device of the converter. To program the correction circuit a decoder maps temperature information associated with the low side power switching device and additional programming information into a current mirror control code.

摘要翻译： 可编程切换的多输出级电流反射镜，电流检测和校正电路控制降压模式DC-DC转换器的操作。 该校正电路产生对感测电流具有规定的逐步温度补偿关系的校正电流。 所感测的电流源自由经由电流反馈电阻器连接到转换器的高侧功率开关器件和低侧功率开关器件之间的公共输出节点的读出放大器控制的可变阻抗。 为了对校正电路进行编程，解码器将与低侧功率开关器件相关联的温度信息和附加编程信息映射到当前镜像控制代码中。

公开(公告)号：US5724370A

公开(公告)日：1998-03-03

申请号：US395814

申请日：1995-02-28

申请人： Paul K. Sferrazza ,  Joseph W. Harmon

发明人： Paul K. Sferrazza ,  Joseph W. Harmon

IPC分类号： H03M13/09 ,  H03M13/00

CPC分类号： H03M13/09

摘要： A method of generating a cyclic redundancy check (CRC) word during transmission and of validating a CRC word during reception in a multiplex data communication system using a single CRC register. A CRC word is generated as data are transmitted by calculating the CRC word based on reflected data, rather than on the transmitted data. The transmitted data is reflected back to the transmitting unit's CRC generation block and the CRC word is immediately generated and appended to the outgoing transmission. In an aspect of the invention and to check whether the transmission was error-free, the one's complement of a CRC word is generated and stored in a CRC register, and the reflected transmission of the CRC word is circulated through the CRC register to yield a predetermined constant value if the transmission was error free.

摘要翻译： 一种在传输过程中产生循环冗余校验（CRC）字和在使用单个CRC寄存器的复用数据通信系统中在接收期间验证CRC字的方法。 通过基于反射数据而不是发送数据计算CRC字来发送数据，产生CRC字。 发送的数据被反射回发送单元的CRC生成块，并且立即生成CRC字并附加到输出传输。 在本发明的一个方面中，为了检查传输是否是无差错的，CRC字的补码产生并存储在CRC寄存器中，CRC字的反射传输通过CRC寄存器循环，产生一个 如果传输是无误的，则是预定的常数值。