公开(公告)号：US6069505A

公开(公告)日：2000-05-30

申请号：US44632

申请日：1998-03-19

申请人： Joseph N. Babanezhad

发明人： Joseph N. Babanezhad

IPC分类号： H03F3/00 ,  H03J7/04 ,  H03L7/089 ,  H03L7/099 ,  H03K5/00

CPC分类号： H03L7/0805 ,  H03F3/005 ,  H03J7/04 ,  H03L7/089 ,  H03L7/099

摘要： A digitally controlled tuner circuit for continuous-time filters. Active RC integrators include digitally programmable feedback capacitors to allow for digital fine tuning of their time constant. The PLL-based tuner circuit includes a sine-wave oscillator made up of the digitally-controlled active RC integrators.

摘要翻译： 用于连续时间滤波器的数字控制调谐器电路。 有源RC积分器包括数字可编程反馈电容器，可以对其时间常数进行数字微调。 基于PLL的调谐器电路包括由数字控制的有源RC积分器组成的正弦波振荡器。

公开(公告)号：US5936445A

公开(公告)日：1999-08-10

申请号：US822990

申请日：1997-03-21

申请人： Joseph N. Babanezhad ,  Emad Afifi

发明人： Joseph N. Babanezhad ,  Emad Afifi

IPC分类号： G05F3/24 ,  H03L7/089 ,  H03L7/099 ,  H03L7/06 ,  G05F1/10

CPC分类号： H03L7/099 ,  G05F3/242 ,  H03L7/0896

摘要： Various circuit techniques to implement continuous-time filters with improved performance are disclosed. The present invention uses RMC type integrators that exhibit lower harmonic distortion. In one embodiment, a novel high-gain two-pole operational amplifier is used along with RMC architecture to achieve lower harmonic distortion. In another embodiment, the present invention uses dummy polysilicon resistors to accurately compensate for the distributed parasitics of the polysilicon resistors used in RMC integrator. In yet another embodiment, the present invention provides an on-chip tuner with a differential architecture for better noise immunity.

摘要翻译： 公开了实现具有改进性能的连续时间滤波器的各种电路技术。 本发明使用表现出较低谐波失真的RMC型积分器。 在一个实施例中，新型高增益双极运算放大器与RMC架构一起使用以实现较低谐波失真。 在另一个实施例中，本发明使用虚拟多晶硅电阻器来精确地补偿RMC积分器中使用的多晶硅电阻的分布寄生效应。 在另一个实施例中，本发明提供具有差分架构的片上调谐器，以提供更好的抗噪声能力。

公开(公告)号：US5744385A

公开(公告)日：1998-04-28

申请号：US822989

申请日：1997-03-21

申请人： Pirooz Hojabri

发明人： Pirooz Hojabri

IPC分类号： H01L27/08 ,  H01L27/02

CPC分类号： H01L27/0802

摘要： Various circuit techniques to implement continuous-time filters with improved performance are disclosed. The present invention uses RMC type integrators that exhibit lower harmonic distortion. In one embodiment, a novel high-gain two-pole operational amplifier is used along with RMC architecture to achieve lower harmonic distortion. In another embodiment, the present invention uses dummy polysilicon resistors to accurately compensate for the distributed parasitics of the polysilicon resistors used in RMC integrator. In yet another embodiment, the present invention provides an on-chip tuner with a differential architecture for better noise immunity.

摘要翻译： 公开了实现具有改进性能的连续时间滤波器的各种电路技术。 本发明使用表现出较低谐波失真的RMC型积分器。 在一个实施例中，新型高增益双极运算放大器与RMC架构一起使用以实现较低谐波失真。 在另一个实施例中，本发明使用虚拟多晶硅电阻器来精确地补偿RMC积分器中使用的多晶硅电阻的分布寄生效应。 在另一个实施例中，本发明提供具有差分架构的片上调谐器，以提供更好的抗噪声能力。

公开(公告)号：US06028479A

公开(公告)日：2000-02-22

申请号：US4628

申请日：1998-01-07

申请人： Joseph N. Babanezhad

发明人： Joseph N. Babanezhad

IPC分类号： H03F3/30 ,  H03F3/45

CPC分类号： H03F3/45273 ,  H03F3/3061 ,  H03F3/45269 ,  H03F3/45659

摘要： A high-speed low-voltage line-driver circuit implemented using various embodiments of high speed current-feedback opamps is disclosed. The line driver of the present invention uses a fully differential architecture whereby common-mode disturbances, such as noise due to substrate or power supply, are cancelled. The driver also uses a current-feedback approach to achieve larger bandwidth. In a specific embodiment, the current-feedback opamp used in the line driver of the present invention uses class A/B structure for both input and output stages.

摘要翻译： 公开了使用高速电流反馈运算放大器的各种实施例实现的高速低压线路驱动电路。 本发明的线路驱动器使用完全差分架构，由此消除由于基板或电源引起的噪声等共模干扰。 驱动程序还使用电流反馈方法来实现更大的带宽。 在具体实施例中，在本发明的线路驱动器中使用的电流反馈运算放大器在输入和输出级都使用A / B类结构。

公开(公告)号：US5880634A

公开(公告)日：1999-03-09

申请号：US822988

申请日：1997-03-21

申请人： Joseph N. Babanezhad

发明人： Joseph N. Babanezhad

IPC分类号： H03F3/45 ,  H03H11/04 ,  H03L5/00 ,  H03L7/089 ,  H03L7/099 ,  H03F3/68

CPC分类号： H03F3/45475 ,  H03H11/04 ,  H03H11/1252 ,  H03L5/00 ,  H03L7/0896 ,  H03L7/0995 ,  H03F2200/36

摘要： Various circuit techniques to implement continuous-time filters with improved performance are disclosed. The present invention uses RMC type integrators that exhibit lower harmonic distortion. In one embodiment, a novel high-gain two-pole operational amplifier is used along with RMC architecture to achieve lower harmonic distortion. In another embodiment, the present invention uses dummy polysilicon resistors to accurately compensate for the distributed parasitics of the polysilicon resistors used in RMC integrator. In yet another embodiment, the present invention provides an on-chip tuner with a differential architecture for better noise immunity.

摘要翻译： 公开了实现具有改进性能的连续时间滤波器的各种电路技术。 本发明使用表现出较低谐波失真的RMC型积分器。 在一个实施例中，新型高增益双极运算放大器与RMC架构一起使用以实现较低谐波失真。 在另一个实施例中，本发明使用虚拟多晶硅电阻器来精确地补偿RMC积分器中使用的多晶硅电阻的分布寄生效应。 在另一个实施例中，本发明提供具有差分架构的片上调谐器，以提供更好的抗噪声能力。