公开(公告)号：US09966793B2

公开(公告)日：2018-05-08

申请号：US15646085

申请日：2017-07-10

申请人： NXP USA, Inc.

发明人： Ashita Batra ,  Mayank Jain

IPC分类号： H02J1/10 ,  H02J9/06 ,  H03K17/687 ,  H03K17/693

CPC分类号： H02J9/061 ,  H02J1/10 ,  H03K17/687 ,  H03K17/693 ,  H03K2217/0018 ,  Y10T307/625

摘要： A system for providing a first voltage generated by a main supply and a second voltage generated by a battery to an integrated circuit (IC) includes supply-selection, control logic and switching circuits. The supply-selection circuit includes first, second, and third transistors. The switching circuit includes fourth and fifth transistors that supply the first and second voltages to the IC when switched on. The supply-selection circuit selects and provides the higher of the first and second voltages to body terminals of the fourth and fifth transistors for maintaining required body-bias voltage conditions. The control logic circuit generates a first control signal as long as the first voltage is within a predetermined range for keeping the fourth transistor switched on and a second control signal when the first voltage is not within the predetermined range for switching on the fifth transistor to supply the second voltage.

公开(公告)号：US20170310159A1

公开(公告)日：2017-10-26

申请号：US15646085

申请日：2017-07-10

申请人： NXP USA, Inc.

发明人： Ashita Batra ,  Mayank Jain

IPC分类号： H02J9/06 ,  H02J1/10 ,  H03K17/687 ,  H03K17/693

CPC分类号： H02J9/061 ,  H02J1/10 ,  H03K17/687 ,  H03K17/693 ,  H03K2217/0018 ,  Y10T307/625

摘要： A system for providing a first voltage generated by a main supply and a second voltage generated by a battery to an integrated circuit (IC) includes supply-selection, control logic and switching circuits. The supply-selection circuit includes first, second, and third transistors. The switching circuit includes fourth and fifth transistors that supply the first and second voltages to the IC when switched on. The supply-selection circuit selects and provides the higher of the first and second voltages to body terminals of the fourth and fifth transistors for maintaining required body-bias voltage conditions. The control logic circuit generates a first control signal as long as the first voltage is within a predetermined range for keeping the fourth transistor switched on and a second control signal when the first voltage is not within the predetermined range for switching on the fifth transistor to supply the second voltage.