ClassID:

171564

G01R23/09 - CPC Classification

Classification description:

Arrangements for measuring frequencies; Arrangements for analysing frequency spectra; Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage using analogue integrators, e.g. capacitors establishing a mean value by balance of input signals and defined discharge signals or leakage

Recent Application in this class:
#1
20250321254
2025-10-16

Frequency Monitoring Circuitry with Voltage Conversion

#2
20240142505
2024-05-02

METHOD FOR TESTING SWITCH SIGNALS OF AN INVERTER OF AN ELECTRIC MACHINE CONTROLLED VIA A PULSE-WIDTH MODULATION

#3
20240110959
2024-04-04

Frequency monitoring circuitry with voltage conversion

#4
20220337257
2022-10-20

Multiphase frequency to voltage converter

#5
20200313616
2020-10-01

Oscillator circuit

#6
20200256906
2020-08-13

Security method for monitoring an optical module and three-dimensional sensor using the same

#7
20190306641
2019-10-03

MEMS transducer system

#8
20180356455
2018-12-13

CAPACITANCE SENSOR

#9
20120112768
2012-05-10

Methods and systems for production testing of DCO capacitors

#10
20120038370
2012-02-16

Method for frequency detection and detecting variation of frequency

#11
20110206139
2011-08-25

Block distortion detection method, block distortion detection apparatus, block distortion removal method, and block distortion removal apparatus

#12
20100219865
2010-09-02

Frequency detection apparatus and method

#13
20100142626
2010-06-10

Block distortion detection method, block distortion detection apparatus, block distortion removal method, and block distortion removal apparatus

#14
20090058468
2009-03-05

Method of detecting the frequency of an input clock signal of an integrated circuit and integrated circuit

#15
20070194629
2007-08-23

Frequency sensor and semiconductor device

#16
20050141619
2005-06-30

Block distortion detection method, block distortion detection apparatus, block distortion removal method, and block distortion removal apparatus

#17
15943487
2018-12-25

Frequency to current circuit