公开(公告)号：US08779824B2

公开(公告)日：2014-07-15

申请号：US13716263

申请日：2012-12-17

Applicant: QUALCOMM Incorporated

Inventor： Wenqing Wu ,  Kendrick H. Yuen ,  David W. Hansquine ,  Robert P. Gilmore ,  Jeff A. Levin

IPC: G06F1/04 ,  H03K3/00

CPC classification number: H03K3/59

Abstract: Clock signals are distributed on a chip by applying an oscillating magnetic field to the chip. Local clock generation circuits including magnetic field sensors are distributed around the chip and are coupled to local clocked circuitry on the chip. The magnetic field sensors may include clock magnetic tunnel junctions (MTJs) in which a magnetic orientation of the free layer is free to rotate in the free layer plane in response to the applied magnetic field. The MTJ resistance alternates between a high resistance value and a low resistance value as the free layer magnetization rotates. Clock generation circuitry coupled to the clock MTJs senses voltage oscillations caused by the alternating resistance of the clock MTJs. The clock generation circuitry includes amplifiers, which convert the sensed voltage into local clock signals.

Abstract translation: 时钟信号通过向芯片施加振荡磁场而分布在芯片上。 包括磁场传感器的本地时钟发生电路分布在芯片周围，并且耦合到芯片上的本地时钟电路。 磁场传感器可以包括响应于所施加的磁场，自由层的磁性取向在自由层平面中自由旋转的时钟磁隧道结（MTJ）。 随着自由层磁化旋转，MTJ电阻在高电阻值和低电阻值之间交替。 耦合到时钟MTJ的时钟产生电路感测由时钟MTJ的交流电阻引起的电压振荡。 时钟产生电路包括放大器，其将所感测的电压转换成本地时钟信号。

公开(公告)号：US20140167831A1

公开(公告)日：2014-06-19

申请号：US13716263

申请日：2012-12-17

Applicant: QUALCOMM INCORPORATED

Inventor： Wenqing Wu ,  Kendrick H. Yuen ,  David W. Hansquine ,  Robert P. Gilmore ,  Jeff A. Levin

IPC: H03K3/59

CPC classification number: H03K3/59

Abstract: Clock signals are distributed on a chip by applying an oscillating magnetic field to the chip. Local clock generation circuits including magnetic field sensors are distributed around the chip and are coupled to local clocked circuitry on the chip. The magnetic field sensors may include clock magnetic tunnel junctions (MTJs) in which a magnetic orientation of the free layer is free to rotate in the free layer plane in response to the applied magnetic field. The MTJ resistance alternates between a high resistance value and a low resistance value as the free layer magnetization rotates. Clock generation circuitry coupled to the clock MTJs senses voltage oscillations caused by the alternating resistance of the clock MTJs. The clock generation circuitry includes amplifiers, which convert the sensed voltage into local clock signals.

Abstract translation: 时钟信号通过向芯片施加振荡磁场而分布在芯片上。 包括磁场传感器的本地时钟发生电路分布在芯片周围，并且耦合到芯片上的本地时钟电路。 磁场传感器可以包括响应于所施加的磁场，自由层的磁性取向在自由层平面中自由旋转的时钟磁隧道结（MTJ）。 随着自由层磁化旋转，MTJ电阻在高电阻值和低电阻值之间交替。 耦合到时钟MTJ的时钟产生电路感测由时钟MTJ的交流电阻引起的电压振荡。 时钟产生电路包括放大器，其将所感测的电压转换成本地时钟信号。