ClassID:

219360

H03F3/45174 - CPC Classification

Classification description:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements; Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit Mirror types

Recent Application in this class:
#1
20260074657
2026-03-12

SEMICONDUCTOR CIRCUIT FOR REDUCING OUTPUT DISTORTION

#2
20250341565
2025-11-06

APPARATUS FOR MEASURING A GATE LEAKAGE CURRENT OF A TRANSISTOR

#3
20250309875
2025-10-02

POWER-EFFICIENT CLOCK BUFFERS

#4
20250247055
2025-07-31

TECHNIQUES FOR DIGITAL-DOMAIN TEMPERATURE COMPENSATION IN LOGARITHMIC TRANSIMPEDANCE AMPLIFIER DEVICES

#5
20250202448
2025-06-19

VARIABLE GAIN AMPLIFIER AND PHASE SHIFTER

#6
20250105809
2025-03-27

AMPLIFIER WITH PRE-DRIVER HAVING CROSS-COUPLED TRANSISTORS

#7
20240388254
2024-11-21

BIAS CIRCUIT

#8
20240195370
2024-06-13

RECEIVER CIRCUIT AND OPTICAL RECEIVER CIRCUIT

#9
20240146268
2024-05-02

REDUCTION OF NOISE AND WEAK AVALANCHE CURRENT INDUCED ERRORS IN BIPOLAR AMPLIFIERS

#10
20230387872
2023-11-30

VOLTAGE-TO-CURRENT CONVERTER WITH COMPLEMENTARY CURRENT MIRRORS

#11
20230120083
2023-04-20

Low-noise power sources for imaging systems

#12
20220182026
2022-06-09

Voltage-to-current converter with complementary current mirrors

#13
20210313942
2021-10-07

Push-pull output driver and operational amplifier using same

#14
20210104991
2021-04-08

Automatic gain control circuit

#15
20210067116
2021-03-04

Voltage-to-current converter with complementary current mirrors

#16
20210059646
2021-03-04

Low-noise power sources for imaging systems

#17
20200264647
2020-08-20

Current reference circuit

#18
20200177145
2020-06-04

Biasing circuits for voltage controlled or output circuits

#19
20200162043
2020-05-21

Push-pull output driver and operational amplifier using same

#20
20200091883
2020-03-19

Ethernet line driver

#21
20200014350
2020-01-09

Current sense circuit stabilized over wide range of load current

#22
20190378559
2019-12-12

Apparatuses and methods for concentrated arrangement of amplifiers

#23
20190180810
2019-06-13

Apparatuses and methods for concentrated arrangement of transistors of multiple amplifier circuits

#24
20190115884
2019-04-18

High performance folded cascode current source with dual mirrors current feedback

#25
20180191319
2018-07-05

Differential input stage with wide input signal range and stable transconductance

#26
20170373654
2017-12-28

System and method for a multistage operational amplifier

#27
20170359041
2017-12-14

Buffer with increased headroom

#28
20170346454
2017-11-30

Transconductance amplifier having low distortion

#29
20170254861
2017-09-07

Sensor device and semiconductor device

#30
20170214367
2017-07-27

Envelope detectors with high input impedance

#31
20170117863
2017-04-27

Variable gain amplifier and driver implementing the same

#32
20170085230
2017-03-23

Class AB amplifier with bias control

#33
20160028355
2016-01-28

Dynamic current source for amplifier integrator stages

#34
20140340149
2014-11-20

Method for low power low noise input bias current compensation

#35
20140327482
2014-11-06

Radio frequency power amplifier with no reference voltage for biasing and electronic system

#36
20140104000
2014-04-17

Feed-forward circuit to prevent phase inversion

#37
20110210785
2011-09-01

Circuit comprising at least a first transistor group and a second transistor group

#38
20070139110
2007-06-21

Differential input and output transconductance circuit

#39
20060186965
2006-08-24

Differential to single-ended converter

#40
20060186958
2006-08-24

High efficiency linear amplifier

#41
20060066362
2006-03-30

Voltage-current conversion circuit, amplifier, mixer circuit, and mobile appliance using the circuit

#42
20050110561
2005-05-26

Precision margining circuitry

#43
20050077958
2005-04-14

Amplifier with capacitor selection

#44
15804115
2019-02-19

Techniques for amplifier output voltage limiting

#45
15660296
2018-10-02

Supply-noise-rejecting current source

#46
15213718
2018-07-03

Frequency enhanced active transistor

#47
13737777
2014-12-02

High dynamic range precision variable amplitude controller