公开(公告)号：EP3400650A1

公开(公告)日：2018-11-14

申请号：EP17701207.7

申请日：2017-01-04

申请人： Qualcomm Incorporated

发明人： ZHANG, Junmou ,  NA, Taesik ,  ZHONG, Guoan ,  CHEN, Nan

IPC分类号： H03K3/011 ,  H03L1/02 ,  G05F3/26 ,  H03K3/03

CPC分类号： H03L1/022 ,  G05F3/262 ,  H03K3/011 ,  H03K3/0315 ,  H03L1/02

摘要： A signal generator configured to generate an oscillating signal with a temperature-compensated frequency. The signal generator includes a ring oscillator, and a complementary to absolute temperature (CTAT) current generator configured to generate a CTAT current for the ring oscillator to temperature-compensate the frequency of the oscillating signal.

公开(公告)号：EP3545317B1

公开(公告)日：2020-05-27

申请号：EP17809083.3

申请日：2017-11-01

申请人： Qualcomm Incorporated

发明人： ZHONG, Guoan ,  ZHANG, Junmou ,  CHEN, Nan

IPC分类号： G06F1/3206 ,  G06F1/324 ,  G06F1/3234 ,  H03K19/00 ,  G01R19/252

公开(公告)号：EP3545317A1

公开(公告)日：2019-10-02

申请号：EP17809083.3

申请日：2017-11-01

申请人： Qualcomm Incorporated

发明人： ZHONG, Guoan ,  ZHANG, Junmou ,  CHEN, Nan

IPC分类号： G01R19/25 ,  G01R19/252 ,  G06F1/32

摘要： An apparatus for sensing distributed load currents provided by power gating circuit. The apparatus includes a power gating circuit including a set of bulk transistors coupled in series with a set of circuits between first and second voltage rails. The apparatus includes a current sensor with a first ring oscillator, a first frequency-to-code (FTC) converter, a second ring oscillator, a second FTC converter, and a subtractor. The first ring oscillator includes a first set of one or more inverters configured to receive a first voltage at a node between the power gating circuit and the first circuit, and a second set of one or more inverters configured to receive a second voltage at a second node between the power gating circuit and the second circuit. The first ring oscillator is configured to generate a signal including a frequency related to the voltage drops across the first and second sets of transistors.