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1.发明授权BEMF monitor gain calibration stage in hard disk drive servo integrated circuit 有权BEMF在硬盘驱动器伺服集成电路中监视增益校准阶段公开(公告)号：US08975964B2
公开(公告)日：2015-03-10
申请号：US13759848
申请日：2013-02-05
Applicant: Texas Instruments Incorporated
Inventor： Qunying Li , Wenxiao Tan , Gregory Swize
CPC classification number: H03G3/00 , H03G1/0088 , H03G3/001
Abstract: A high performance digitalized Programmable Gain Amplifier (PGA). In prior art circuit, a dual-ladder DAC is employed for gain control, the back gate leakage of NMOS resistors in the fine ladder conquers fine ladder nominal current and it produces non-monotonic gain scallop. Two new art design techniques: (1) adaptively control the fine ladder; and (2) use dummy PMOS brunch device leakage compensates for the NMOS resistor device leakage, are proposed so that the non-monotonic scallops are substantially eliminated and 13-bit resolution/accuracy PGA has been achieved.
Abstract translation: 高性能数字化可编程增益放大器（PGA）。 在现有技术的电路中，采用双梯形DAC进行增益控制，精细梯形图中的NMOS电阻的背栅极泄漏征服了细梯级标称电流，并产生非单调增益扇贝。 两种新的艺术设计技巧：（1）适应性地控制细梯; 并且（2）使用虚拟PMOS快速装置漏电补偿NMOS电阻器件泄漏，从而基本上消除了非单调扇贝，并且已经实现了13位分辨率/精度PGA。
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2.发明申请BEMF MONITOR GAIN CALIBRATION STAGE IN HARD DISK DRIVE SERVO INTEGRATED CIRCUIT 有权硬盘驱动器集成电路中的BEMF监视器增益校准阶段公开(公告)号：US20130200954A1
公开(公告)日：2013-08-08
申请号：US13759848
申请日：2013-02-05
Applicant: Texas Instruments Incorporated
Inventor： Qunying Li , Wenxiao Tan , Gregory Swize
IPC: H03G3/00
CPC classification number: H03G3/00 , H03G1/0088 , H03G3/001
Abstract: A high performance digitalized Programmable Gain Amplifier (PGA). In prior art circuit, a dual-ladder DAC is employed for gain control, the back gate leakage of NMOS resistors in the fine ladder conquers fine ladder nominal current and it produces non-monotonic gain scallop. Two new art design techniques: (1) adaptively control the fine ladder; and (2) use dummy PMOS brunch device leakage compensates for the NMOS resistor device leakage, are proposed so that the non-monotonic scallops are substantially eliminated and 13-bit resolution/accuracy PGA has been achieved.
Abstract translation: 高性能数字化可编程增益放大器（PGA）。 在现有技术的电路中，采用双梯形DAC进行增益控制，精细梯形图中的NMOS电阻的背栅极泄漏征服了细梯级标称电流，并产生非单调增益扇贝。 两种新的艺术设计技巧：（1）适应性地控制细梯; 并且（2）使用虚拟PMOS快速装置漏电补偿NMOS电阻器件泄漏，从而基本上消除了非单调扇贝，并且已经实现了13位分辨率/精度PGA。
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