H03F3/55 - CPC Classification Index

ClassID:

219486 ⎘

H03F3/55 - CPC Classification

Classification description:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements; Amplifiers using transit-time effect in tubes or semiconductor devices with semiconductor devices only

Recent Application in this class:

20240048109

2024-02-08

SIGNAL TERMINATION FOR AMPLIFIERS

20230188106

2023-06-15

Traveling-wave transimpedance amplifier

20190273468

2019-09-05

Differential constructive wave oscillator device

20180198431

2018-07-12

Variable gain amplifier

20170359042

2017-12-14

Variable gain distributed amplifier systems and methods

20170271740

2017-09-21

Ultra-wideband radial waveguide to coaxial combiner/divider

20170271737

2017-09-21

Waveguide to coaxial line transition having rigid hollow cone portions

20170117860

2017-04-27

Amplifier

20160380699

2016-12-29

Traveling wave amplifier for driving optical modulator

#10

20160359464

2016-12-08

Solid state traveling wave amplifier for space applications

#11

20160065154

2016-03-03

Travelling wave amplifier (TWA) for driving optical modulator

#12

20140347123

2014-11-27

Amplifier

#13

20130135046

2013-05-30

Switching circuit and envelope signal amplifier

#14

20080224778

2008-09-18

Transmission line amplifier

#15

20080100381

2008-05-01

Common drain driven cascode enhancement mode traveling wave amplifier