ClassID:

171501

G01R19/22 - CPC Classification

Classification description:

Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of ac into dc

Sub-classes:
Recent Application in this class:
#1
20260086126
2026-03-26

ELECTROMAGNETIC ENERGY CHARGING CLAMP METER

#2
20250383381
2025-12-18

APPARATUS AND METHOD FOR CONTROLLING PHASE OF MEASUREMENT WAVEFORM OF MU

#3
20250330194
2025-10-23

SIGMA-DELTA MODULATOR WITH RESIDUE CONVERTER FOR LOW-OFFSET MEASUREMENT SYSTEM

#4
20250298064
2025-09-25

SYSTEM INCLUDING MULTIFUNCTIONAL DIRECT CURRENT POWER QUALITY METER AND OPERATING METHOD THEREOF

#5
20250298058
2025-09-25

SYSTEM AND METHOD FOR PRECISION CURRENT AND EFFICIENCY DETERMINATION IN A POWER SYSTEM

#6
20250155478
2025-05-15

DEVICE & METHOD FOR MEASURING LEAKAGE CURRENT

#7
20240415354
2024-12-19

CORDLESS VACUUM CLEANER ADOPTING OVERHEATING PROTECTION METHOD

#8
20240393375
2024-11-28

POWER RECEPTION APPARATUS AND RECEIVED POWER ESTIMATION METHOD

#9
20240175960
2024-05-30

HYBRID CURRENT SENSE SYSTEM

#10
20240168066
2024-05-23

System and method for verifying alternating current (AC)/direct current (DC) conversion of ultralow-frequency voltage based on quantum technology

#11
20240039066
2024-02-01

POWER SUPPLY CONTROL SYSTEMS AND METHODS

#12
20230160934
2023-05-25

Grounding Assurance and Voltage-to-Patient Detection for Patient Safety

#13
20230060338
2023-03-02

Input power monitoring circuit

#14
20230046592
2023-02-16

Two-temperature trimming for a voltage reference with reduced quiescent current

#15
20230013695
2023-01-19

Precision dynamic range expansion for current measurement

#16
20220397591
2022-12-15

On resistance current sensing for power conversion devices

#17
20220360167
2022-11-10

Charge mode control for power factor correction circuit

#18
20220302738
2022-09-22

ADAPTER AND CHARGING METHOD

#19
20220137105
2022-05-05

Method for measuring current and measurement apparatus

#20
20220128605
2022-04-28

Leakage compensation technique for current sensor

#21
20220099714
2022-03-31

DC signal measurement and battery formation/testing

#22
20220037177
2022-02-03

Electrostatic capacitance sensor

#23
20210389377
2021-12-16

Current sense multi-chip module

#24
20210373058
2021-12-02

Detection apparatus for unbalanced DC link capacitor voltage

#25
20210231714
2021-07-29

System for detecting a drop in voltage of an AC power supply

#26
20210223298
2021-07-22

High voltage three phase current and voltage sensor assembly system without ground connection and method

#27
20210215785
2021-07-15

Current measurement in power-gated microprocessors

#28
20210215746
2021-07-15

Self-calibration method for self-powered single CT current sensor

#29
20210215745
2021-07-15

Electrical signal measurement using subdivision

#30
20210199700
2021-07-01

DC power rail probes and measurement methods

#31
20210166869
2021-06-03

Self calibration by signal injection

#32
20210165066
2021-06-03

Self calibration by double signal sampling

#33
20210075070
2021-03-11

Power supply control systems and methods

#34
20210063450
2021-03-04

SYSTEM FOR PRECISION MEASUREMENT OF ELECTRICAL CURRENT

#35
20210015984
2021-01-21

Apparatus for performing an extracorporeal blood treatment

#36
20200200802
2020-06-25

Method and system for measuring electrical quantities

#37
20200142002
2020-05-07

Relay diagnosis circuit

#38
20200067458
2020-02-27

Modulating input device having a full wave rectifier

#39
20190353708
2019-11-21

Relay-welding detection device and detection method

#40
20190208604
2019-07-04

Intelligent lighting control power measurement apparatuses, systems, and methods

#41
20190101575
2019-04-04

AC voltage detection device, image forming apparatus, and industrial machine

#42
20190072632
2019-03-07

Proving unit for use with electrical test tools

#43
20190035571
2019-01-31

Arc-extinguishing power device driving apparatus and arc extinguishing apparatus

#44
20180198363
2018-07-12

Discharge device, power supply apparatus, and discharge method with power supply cut-off detection and capacitor discharge

#45
20180172523
2018-06-21

VOLTAGE DETECTING DEVICE, TEMPERATURE DETECTING DEVICE HAVING THE SAME, VOLTAGE DETECTING METHOD, AND TEMPERATURE DETECTING METHOD HAVING THE SAME

#46
20180147335
2018-05-31

Apparatus for performing an extracorporeal blood treatment

#47
20180138803
2018-05-17

Current detection apparatus and power conversion apparatus

#48
20170343588
2017-11-30

Method and system for estimating RMS of AC voltage

#49
20170288567
2017-10-05

Power conversion device

#50
20170059630
2017-03-02

Voltage detection circuit and a method of detecting voltage changes

#51
20160356824
2016-12-08

LOSS-PHASE LACK-VOLTAGE DETECTION CIRCUIT FOR THREE-PHASE INPUT POWER

#52
20160276988
2016-09-22

Voltage detecting circuit and power amplifier

#53
20160216297
2016-07-28

Apparatus for detecting noise in power supply of PLC analogue input and output module

#54
20160178675
2016-06-23

Log-linear power detector

#55
20160164428
2016-06-09

Methods and devices for detecting the input voltage and discharging the residuevoltage

#56
20160061867
2016-03-03

Method and apparatus for metering a voltage signal

#57
20150381061
2015-12-31

Current sampling method and current sampling apparatus for isolated power converter

#58
20150362533
2015-12-17

METHOD AND SYSTEM FOR MONITORING EQUIPMENT AT MEDIUM VOLTAGE

#59
20150268303
2015-09-24

Method and device for measuring a current flowing through a switch

#60
20150268280
2015-09-24

Methods and devices for AC current sources, precision current transducers and detectors

#61
20150260767
2015-09-17

Branch Circuit Monitor

#62
20150253361
2015-09-10

Voltage monitoring circuit

#63
20150247885
2015-09-03

System comprising a probe and a measuring device

#64
20150145523
2015-05-28

Power conversion device including abnormality detection function of LC filter

#65
20150130441
2015-05-14

DETECTION DEVICE AND METHOD FOR ELECTRONIC DEVICE

#66
20150069998
2015-03-12

Power line takeoff clamp assembly

#67
20140368190
2014-12-18

Branch circuit monitor

#68
20140333289
2014-11-13

CURRENT DETECTION DEVICE FOR MULTI-SENSOR ARRAY

#69
20140278175
2014-09-18

Circuit arrangement and method for determining a current in a circuit arrangement

#70
20140074979
2014-03-13

Web based smart sensor network tracking and monitoring system

#71
20140062460
2014-03-06

Power measurement circuit

#72
20140016384
2014-01-16

Current sensing circuit and control circuit thereof and power converter circuit

#73
20130234775
2013-09-12

Dynamic improvement in RMS to DC converters

#74
20130215163
2013-08-22

AC voltage detection circuit, heater control device and image forming device

#75
20130169268
2013-07-04

Schottky Diode Radio Frequency Detector Probe With Amplitude Linearity Compensation

#76
20130027238
2013-01-31

Systems, methods, and apparatus for sensing AC voltage

#77
20130027022
2013-01-31

System for measuring current and method of making same

#78
20120239025
2012-09-20

Isolated Current Sensor

#79
20120112727
2012-05-10

ELECTRIC CURRENT MEASURING DEVICE, ELECTRIC CURRENT MEASURING METHOD, AND ELECTRIC CURRENT MEASURING PROGRAM

#80
20120081027
2012-04-05

Full wave current sense rectifier

#81
20110291642
2011-12-01

Power measurement circuit

#82
20100194461
2010-08-05

Extended range RMS-DC converter

#83
20100080175
2010-04-01

Web based smart sensor network tracking and monitoring system

#84
20100013457
2010-01-21

Power line takeoff clamp assembly

#85
20080030237
2008-02-07

Signal-processing circuit, in particular operating as a rectifier and peak detector, with active elements and differential inputs

#86
20070270116
2007-11-22

Extended range RMS-DC converter

#87
20050073327
2005-04-07

Range resistors for AC-DC transfer measurements

#88
13668473
2015-05-12

Online testing of secondary power unit