H03H11/1256 - CPC Classification Index

ClassID:

220865 ⎘

H03H11/1256 - CPC Classification

Classification description:

Networks using active elements; Multiple-port networks; Frequency selective two-port networks using amplifiers with feedback using a plurality of operational amplifiers; Two integrator-loop-filters Tow-Thomas biquad

Recent Application in this class:

20180351535

2018-12-06

Active biquad filter with oscillator circuit

20180205367

2018-07-19

Tunable bandpass filter

20170149412

2017-05-25

Adjustable low-pass filter in a compact low-power receiver

20170063341

2017-03-02

Ultra-low frequency bio-medical active-RC lowpass filters

20170026030

2017-01-26

Multimode reconfigurable amplifier and analog filter including the same

20170012608

2017-01-12

Method and apparatus for signal filtering and for improving properties of electronic devices

20140195577

2014-07-10

Method and apparatus for signal filtering and for improving properties of electronic devices

20130339418

2013-12-19

Method and apparatus for signal filtering and for improving properties of electronic devices

20130259172

2013-10-03

Receiver with variable gain control transimpedance amplifier

#10

20130259163

2013-10-03

Device including a plurality of analog circuits and an interface that matches characteristics of the analog circuits

#11

20120293233

2012-11-22

Broadband analog radio-frequency integrator

#12

20120021712

2012-01-26

Compact low-power receiver including transimpedance amplifier, digitally controlled interface circuit, and low pass filter

#13

20110012678

2011-01-20

Transfer-function control in an active filter

#14

20100097152

2010-04-22

Tunable filter with gain control circuit

#15

20080096514

2008-04-24

Controlling the bandwidth of an analog filter

#16

20050149592

2005-07-07

Complex filter with higher order pole