Patents-Review.com
ClassID:

219187 ⎘

H03F1/38 - CPC Classification

Classification description:

Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements Positive-feedback circuit arrangements without negative feedback

Sub-classes:
Recent Application in this class:
#1
20250105855
2025-03-27

PROGRAMMABLE GAIN AMPLIFIER AND A DELTA SIGMA ANALOG-TO-DIGITAL CONVERTER CONTAINING THE PGA

 #2
20230110204
2023-04-13

Programmable gain amplifier and a delta sigma analog-to-digital converter containing the PGA

 #3
20220247353
2022-08-04

Multi-element resonator

 #4
20220149791
2022-05-12

Amplifier circuit

 #5
20210344310
2021-11-04

Common-mode insensitive current-sensing topology in full-bridge driver

 #6
20210242832
2021-08-05

Multi-element resonator

 #7
20210119585
2021-04-22

Hysteresis comparator

 #8
20200389178
2020-12-10

Programmable gain amplifier and a delta sigma analog-to-digital converter containing the PGA

 #9
20200244231
2020-07-30

Cartesian feedback circuit

 #10
20190288702
2019-09-19

Programmable gain amplifier and a delta sigma analog-to-digital converter containing the PGA

 #11
20190267952
2019-08-29

Miller compensation circuit and electronic circuit

 #12
20190089367
2019-03-21

Programmable gain amplifier and a delta sigma analog-to-digital converter containing the PGA

 #13
20190068134
2019-02-28

Bootstrapped application arrangement and application to the unity gain follower

 #14
20180241352
2018-08-23

Apparatus and method for improving efficiency of power amplifier

 #15
20180205351
2018-07-19

Amplifier system for use as high sensitivity selective receiver without frequency conversion

 #16
20180205350
2018-07-19

Amplifier system for use as high sensitivity selective receiver without frequency conversion

 #17
20180026591
2018-01-25

Logarithmic detector amplifier system for use as high sensitivity selective receiver without frequency conversion

 #18
20170366143
2017-12-21

Wideband high dynamic range low noise amplifier

 #19
20170230005
2017-08-10

Ultra-low working voltage rail-to-rail operational amplifier, and differential input amplification-stage circuit and output-stage circuit thereof

 #20
20170187337
2017-06-29

Advanced amplifier system for ultra-wide band RF communication

 #21
20170026030
2017-01-26

Multimode reconfigurable amplifier and analog filter including the same

 #22
20160262703
2016-09-15

Ultra high impedance sensor with applications in neurosensing

 #23
20140028400
2014-01-30

Semiconductor integrated circuit

 #24
20130293306
2013-11-07

Comparator with self-limiting positive feedback

 #25
20130015919
2013-01-17

System and method for capacitive signal source amplifier

 #26
20120286874
2012-11-15

Positive feedback common gate low noise amplifier

 #27
20120068769
2012-03-22

High-frequency differential amplifier circuit

 #28
20110090009
2011-04-21

Capacitive sensor

 #29
20110001515
2011-01-06

Comparator with self-limiting positive feedback

 #30
20100109783
2010-05-06

Reconfigurable Amplifier and Filter Using Time-Varying Circuits

 #31
20090268486
2009-10-29

Self-oscillating modulator

 #32
20080186093
2008-08-07

Switched capacitor amplifier with higher gain and improved closed-loop gain accuracy

 #33
20080118097
2008-05-22

Speaker

 #34
20080048728
2008-02-28

STABLE SENSE AMPLIFIER

 #35
20070290741
2007-12-20

Technique to improve the gain and signal to noise ratio in CMOS switched capacitor amplifiers

 #36
20070273441
2007-11-29

Amplifier

 #37
20070182482
2007-08-09

Technique to improve the gain and signal to noise ratio in CMOS switched capacitor amplifiers

 #38
20070090273
2007-04-26

High performance charge detection amplifier for CCD image sensors

 #39
20070080745
2007-04-12

Audio amplifier

 #40
20070040607
2007-02-22

Switched capacitor amplifier with higher gain and improved closed-loop gain accuracy

 #41
20070030059
2007-02-08

Technique to improve the gain and signal to noise ratio in CMOS switched capacitor amplifiers

 #42
20060197597
2006-09-07

Ultra low-frequency response, DC-blocked low-noise amplifier

 #43
20060186963
2006-08-24

Active LC filtering damping circuit with galvanic isolation

 #44
20060006941
2006-01-12

Class D-amplifier

 #45
20050127885
2005-06-16

Regulator with variable capacitor for stability compensation