H03G3/225 - CPC Classification Index

ClassID:

220240 ⎘

H03G3/225 - CPC Classification

Classification description:

Gain control in amplifiers or frequency changers without distortion of the input signal; Automatic control in amplifiers having discharge tubes controlling or controlled by the (local) oscillators of a (super)heterodyne receiver

Recent Application in this class:

20200204131

2020-06-25

Variable gain amplifiers for communication systems

20190207576

2019-07-04

Variable gain amplifiers for communication systems

20090054017

2009-02-26

Signal amplifier structure for radio transmitter

15597074

2019-04-23

Variable gain amplifiers for communication systems