ClassID:

219211

H03F3/085 - CPC Classification

Classification description:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light using opto-couplers between stages

Recent Application in this class:
#1
20250097611
2025-03-20

CROSS-CONNECT SWITCH ARCHITECTURE

#2
20230421116
2023-12-28

HIGH BANDWIDTH TRANSIMPEDANCE AMPLIFIER

#3
20220236755
2022-07-28

Constant current generation circuit for optocoupler isolation amplifier and current precision adjustment method

#4
20210359650
2021-11-18

Isolation circuit systems and methods thereof

#5
20210058042
2021-02-25

Photo-current amplification apparatus

#6
20210021916
2021-01-21

Cross-connect switch architecture

#7
20210021241
2021-01-21

Isolation circuit

#8
20200295715
2020-09-17

Linear isolation amplifier and method for self-calibration thereof

#9
20190280781
2019-09-12

Method and system for a distributed optoelectronic receiver

#10
20180342989
2018-11-29

Isolation circuit

#11
20180262275
2018-09-13

Method and system for a distributed optoelectronic receiver

#12
20180175810
2018-06-21

Input protection circuit for an analog optocoupler

#13
20180149587
2018-05-31

Signal detection device and optical characteristics measurement device

#14
20180145645
2018-05-24

OPTICAL COUPLING CIRCUIT INCLUDING A LIGHT-RECEIVING UNIT PROVIDED NOT TO RECEIVE OPTICAL SIGNAL AND SIGNAL PROCESSING DEVICE

#15
20180102749
2018-04-12

Ultra-broadband transimpedance amplifiers (tia) for optical fiber communications

#16
20180088237
2018-03-29

Implementing enhanced CMOS inverter based optical transimpedance amplifier

#17
20170163352
2017-06-08

Trans-impedance amplifier and optical receiver including the same

#18
20170141853
2017-05-18

Method and system for a distributed optoelectronic receiver

#19
20170126182
2017-05-04

Implementing enhanced CMOS inverter based optical transimpedance amplifier

#20
20160352291
2016-12-01

Power amplifier without a transformer

#21
20160142026
2016-05-19

Regulated cascode (RGC)-type burst mode optic pre-amplifier having extended linear input range

#22
20150381914
2015-12-31

Active pixel sensor imaging system

#23
20150333841
2015-11-19

Opical coupling circuit including a light-receiving unit provided not to receive optical signal, and signal processing device

#24
20150194939
2015-07-09

MEANS FOR DYNAMIC ELECTRONIC OR DIGITAL PROGRAMMABLE CONTROL OF ANALOG HIGH OR LOW VOLTAGE AUDIO SIGNALS IN MUSIC INSTRUMENT AMPLIFIERS

#25
20150145597
2015-05-28

Multi-stage transimpedance amplifier and a method of using the same

#26
20150091654
2015-04-02

High voltage wide bandwidth amplifier

#27
20150071654
2015-03-12

Current voltage conversion circuit, light receiving apparatus, and light transmission system

#28
20140325322
2014-10-30

Semiconductor integrated circuit and drive apparatus including the same

#29
20140284458
2014-09-25

Light receiving circuit and photocoupler

#30
20130181771
2013-07-18

LIGHT RECEIVING CIRCUIT AND PHOTO-COUPLING TYPE INSULATED CIRCUIT

#31
20130055052
2013-02-28

Semiconductor integrated circuit and drive apparatus including the same

#32
20130016748
2013-01-17

Transimpedance amplifier, semiconductor device, and optical module to include an adding circuit for adding first and second current variation

#33
20120287952
2012-11-15

APPARATUS AND METHODS FOR HIGH VOLTAGE AMPLIFICATION WITH LOW NOISE

#34
20120280151
2012-11-08

Electrical isolation device

#35
20110101256
2011-05-05

Output circuit, light-receiver circuit using the same, and photocoupler

#36
20100194617
2010-08-05

Transimpedance amplifier and analog-digital converter circuit

#37
20100189278
2010-07-29

Public-address system

#38
20070242743
2007-10-18

Unipolar Electric Pulse Generator

#39
20060290425
2006-12-28

Isolated conversion apparatus for analog signal

#40
20060202766
2006-09-14

Transimpedance amplifier with signal amplification circuit that performs power signal regulation

#41
14172107
2016-10-18

Photoconductive semiconductor amplifier and switch