ClassID:

171584

G01R25/04 - CPC Classification

Classification description:

Arrangements for measuring phase angle between a voltage and a current or between voltages or currents involving adjustment of a phase shifter to produce a predetermined phase difference, e.g. zero difference

Recent Application in this class:
#1
20250277832
2025-09-04

FREQUENCY TRACKING METHOD AND SYSTEM FOR ULTRASONIC TRANSDUCER AND ULTRASONIC DEVICE

#2
20250208179
2025-06-26

PHASE DETECTION

#3
20230333160
2023-10-19

Fan-out buffer with skew control function, operating method thereof, and probe card including the same

#4
20230184695
2023-06-15

Systems for passive microwave remote sensing and their calibration methods

#5
20230099986
2023-03-30

Pattern generator and built-in-self test device including the same

#6
20220205930
2022-06-30

Systems for passive microwave remote sensing and their calibration methods

#7
20220137112
2022-05-05

ALIGNMENT OF SYNCHRONIZED PHASE ANGLE MEASUREMENTS WITH PRESENCE OF PRACTICAL TIME SHIFT

#8
20220099719
2022-03-31

Apparatus and method to determine impedance and/or admittance in a wireless device

#9
20220099718
2022-03-31

Method and device for detecting the phase of a signal via a hybrid coupler, using a reference phase

#10
20210391650
2021-12-16

Integrated multi-channel RF circuit with phase sensing

#11
20210341521
2021-11-04

Method and device for improving phase measurement accuracy

#12
20210190841
2021-06-24

Device and method for measuring of the complex transfer function of an object

#13
20210084722
2021-03-18

Induction heating device having improved output control function

#14
20210055445
2021-02-25

Inspection device

#15
20200212899
2020-07-02

Methods and apparatus for phase imbalance correction

#16
20200150164
2020-05-14

Amplitude and phase detection circuit

#17
20200103452
2020-04-02

Fault-type identification in an electric power delivery system using composite signals

#18
20190219619
2019-07-18

Phased array wireless power delivery optmization

#19
20190214724
2019-07-11

Integrated multi-channel RF circuit with phase sensing

#20
20190052126
2019-02-14

Method for detecting foreign object, wireless power transfer control apparatus, and wireless power transfer apparatus using the same

#21
20180313895
2018-11-01

Jitter measurement circuit and jitter measurement system

#22
20180284157
2018-10-04

Communication system, harness, and detection apparatus

#23
20180278456
2018-09-27

Method and system for controlling phase of a signal

#24
20180241212
2018-08-23

Method for independent real and reactive power flow control using locally available parameters

#25
20180224487
2018-08-09

Signal processor

#26
20180175829
2018-06-21

PHASE AND AMPLITUDE DETECTION IN WIRELESS ENERGY TRANSFER SYSTEMS

#27
20180115291
2018-04-26

Semiconductor device

#28
20180096341
2018-04-05

Transmit phase detection circuit

#29
20170230042
2017-08-10

Phase difference detecting device

#30
20170111029
2017-04-20

Phase and amplitude detection in wireless energy transfer systems

#31
20170097381
2017-04-06

Apparatus and method for determining a resonant frequency of an LC circuit in situ, by comparing voltage and current polarity changes

#32
20170093443
2017-03-30

Amplifier module

#33
20160109493
2016-04-21

Power flow management method and controller using the same

#34
20160084894
2016-03-24

Methods and systems for measuring power in wireless power systems

#35
20160072495
2016-03-10

Phase adjustment device, phase difference detecting device and phase-adjusting method

#36
20150346251
2015-12-03

DETECTOR CIRCUIT

#37
20150214871
2015-07-30

Method and System for Determining Motor Shaft Position

#38
20140306687
2014-10-16

System and method for measuring an integrated circuit age

#39
20120140805
2012-06-07

COMPLEX ADAPTIVE PHASE ESTIMATION

#40
20110121815
2011-05-26

Measuring apparatus, parallel measuring apparatus, testing apparatus and electronic device

#41
20110050283
2011-03-03

Synchronous phase detection circuit

#42
20090146640
2009-06-11

Phase difference measuring device and phase comparison circuit adjusting method

#43
20060202733
2006-09-14

High performance signal generation

#44
20060202672
2006-09-14

Time aligned bussed triggering using synchronized time-stamps and programmable delays

#45
20050218997
2005-10-06

Digital phase detector

#46
16235669
2019-11-26

Methods and apparatus for phase imbalance correction

#47
14601454
2016-09-27

System and method for measuring passive intermodulation (PIM) in a device under test (DUT)