公开(公告)号：US08067992B2

公开(公告)日：2011-11-29

申请号：US12134323

申请日：2008-06-06

申请人： Alex Jianzhong Chen ,  Gim Eng Chew ,  Tong Tee Tan ,  Kok Chin Pan

发明人： Alex Jianzhong Chen ,  Gim Eng Chew ,  Tong Tee Tan ,  Kok Chin Pan

IPC分类号： H03K3/26

CPC分类号： H03K3/011 ,  H03K3/0231

摘要： Disclosed are various embodiments of temperature-compensated relaxation oscillator circuits that may be fabricated using conventional CMOS manufacturing techniques. The relaxation oscillator circuits described herein exhibit superior low temperature coefficient performance characteristics, and do not require the use of expensive off-chip high precision resistors to effect temperature compensation. Positive and negative temperature coefficient resistors arranged in a resistor array offset one another to provide temperature compensation in the relaxation oscillator circuit.

摘要翻译： 公开了可以使用常规CMOS制造技术制造的温度补偿张弛振荡器电路的各种实施例。 本文描述的张弛振荡器电路表现出优异的低温系数性能特性，并且不需要使用昂贵的片外高精度电阻器来实现温度补偿。 布置在电阻器阵列中的正和负温度系数电阻彼此偏移以在张弛振荡器电路中提供温度补偿。

公开(公告)号：US20120056672A1

公开(公告)日：2012-03-08

申请号：US12807403

申请日：2010-09-03

申请人： Sherif Galal ,  Alex Jianzhong Chen ,  Khaled Abdelfattah ,  Todd L. Brooks

发明人： Sherif Galal ,  Alex Jianzhong Chen ,  Khaled Abdelfattah ,  Todd L. Brooks

IPC分类号： H03F3/16

CPC分类号： H03F3/211 ,  H03F1/301 ,  H03F3/3022 ,  H03F2200/375 ,  H03F2200/453 ,  H03F2203/30015

摘要： Disclosed is a Class-AB/B amplifier comprising a first output stage including a first plurality of amplification devices and a second output stage including a second plurality of amplification devices. According to one embodiment, the first output stage operates when the Class-AB/B amplifier is in a quiescent state and the second output stage operates when the Class-AB/B amplifier is in an active state. The Class-AB/B amplifier also comprises a level shifting circuit that adjusts a control voltage of the second output stage, where the level shifting circuit is adapted to activate the second output stage when the Class-AB/B amplifier enters the active state. Embodiments of the Class-AB/B amplifier may include a level shifting circuit that implements either a fixed or signal-dependent level shift, and a quiescent control circuit that substantially eliminates any systematic offset arising from the active feedback circuit inside the replica bias circuit.

公开(公告)号：US08294518B2

公开(公告)日：2012-10-23

申请号：US12807403

申请日：2010-09-03

申请人： Sherif Galal ,  Alex Jianzhong Chen ,  Khaled Abdelfattah ,  Todd L. Brooks

发明人： Sherif Galal ,  Alex Jianzhong Chen ,  Khaled Abdelfattah ,  Todd L. Brooks

IPC分类号： H03F3/26

CPC分类号： H03F3/211 ,  H03F1/301 ,  H03F3/3022 ,  H03F2200/375 ,  H03F2200/453 ,  H03F2203/30015

摘要： Disclosed is a Class-AB/B amplifier comprising a first output stage including a first plurality of amplification devices and a second output stage including a second plurality of amplification devices. According to one embodiment, the first output stage operates when the Class-AB/B amplifier is in a quiescent state and the second output stage operates when the Class-AB/B amplifier is in an active state. The Class-AB/B amplifier also comprises a level shifting circuit that adjusts a control voltage of the second output stage, where the level shifting circuit is adapted to activate the second output stage when the Class-AB/B amplifier enters the active state. Embodiments of the Class-AB/B amplifier may include a level shifting circuit that implements either a fixed or signal-dependent level shift, and a quiescent control circuit that substantially eliminates any systematic offset arising from the active feedback circuit inside the replica bias circuit.

摘要翻译： 公开了一种AB-B类放大器，其包括包括第一多个放大装置的第一输出级和包括第二多个放大装置的第二输出级。 根据一个实施例，当AB类/ B放大器处于静态时，第一输出级工作，而当AB类/ B放大器处于活动状态时，第二输出级工作。 AB类/ B放大器还包括一个电平移动电路，其调节第二输出级的控制电压，其中当AB类/ B放大器进入激活状态时，电平移位电路用于激活第二输出级。 AB类/ B放大器的实施例可以包括实现固定或信号相关电平移位的电平移位电路和基本上消除由复制偏置电路内部的有源反馈电路产生的任何系统偏移的静态控制电路。

公开(公告)号：US20090302954A1

公开(公告)日：2009-12-10

申请号：US12134323

申请日：2008-06-06

申请人： Alex Jianzhong Chen ,  Gim Eng Chew ,  Tong Tee Tan ,  Kok Chin Pan

发明人： Alex Jianzhong Chen ,  Gim Eng Chew ,  Tong Tee Tan ,  Kok Chin Pan

IPC分类号： G05D23/20 ,  H03K3/26

CPC分类号： H03K3/011 ,  H03K3/0231

摘要： Disclosed are various embodiments of temperature-compensated relaxation oscillator circuits that may be fabricated using conventional CMOS manufacturing techniques. The relaxation oscillator circuits described herein exhibit superior low temperature coefficient performance characteristics, and do not require the use of expensive off-chip high precision resistors to effect temperature compensation. Positive and negative temperature coefficient resistors arranged in a resistor array offset one another to provide temperature compensation in the relaxation oscillator circuit.

摘要翻译： 公开了可以使用常规CMOS制造技术制造的温度补偿张弛振荡器电路的各种实施例。 本文描述的张弛振荡器电路表现出优异的低温系数性能特性，并且不需要使用昂贵的片外高精度电阻器来实现温度补偿。 布置在电阻器阵列中的正和负温度系数电阻彼此偏移以在张弛振荡器电路中提供温度补偿。