H03F 1/24

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Class  H03F : AMPLIFIERS


Subclass 1/24: Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements (wide-band amplifiers with inter-stage coupling networks incorporating these impedances H03F 1/42; eliminating transit-time effects in vacuum tubes H01J 21/34) by use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively in discharge-tube amplifiers

Recent Patents

Patent #TitleFiling DateIssue DatePatent Owner
11689227 Broadband power amplifier device and transmitterDec 03, 21Jun 27, 23HANGZHOU GEO-CHIP TECHNOLOGY CO., LTD.
11070179 Apparatus and method for measuring speaker transducer impedance versus frequency with ultralow inaudible signalSep 05, 19Jul 20, 21Cirrus Logic, Inc.
9917586 Digital signal up-converting apparatus and related digital signal up-converting methodJun 02, 17Mar 13, 18MEDIATEK INC.
9876501 Switching power amplifier and method for controlling the switching power amplifierMay 02, 14Jan 23, 18MEDIATEK INC.
9712169 Transmit power measurement apparatus having programmable filter device that is set at least based on frequency response of transmit power detection path and related transmit power measurement method thereofMay 16, 14Jul 18, 17MEDIATEK SINGAPORE PTE. LTD.
9698785 Digital signal up-converting apparatus and related digital signal up-converting methodSep 02, 16Jul 04, 17MEDIATEK INC.
9577638 Digital signal up-converting apparatus and related digital signal up-converting methodMay 09, 14Feb 21, 17MEDIATEK INC.
9425796 Data converting device, digital transmitting apparatus using the data converting device, and related data converting methodMay 08, 14Aug 23, 16MEDIATEK INC.
9191004 Signal converting device and digital transmitting apparatus applying the signal converting deviceMay 07, 14Nov 17, 15MEDIATEK INC.
9124267 Digital transmitter and method for calibrating digital transmitterMay 20, 14Sep 01, 15MEDIATEK INC.
9118319 Reconfigurable circuit block supporting different interconnection configurations for rate-conversion circuit and processing circuit and related method thereofMay 18, 14Aug 25, 15MEDIATEK INC.
9094004 Transmitter system with digital phase rotator used for applying digital phase rotation to constellation data and related signal transmission method thereofMay 19, 14Jul 28, 15MEDIATEK INC.
8908751 Joint adaptive bias point adjustment and digital pre-distortion for power amplifierFeb 28, 11Dec 09, 14INTEL DEUTSCHLAND GMBH
8729962 Millimeter wave power amplifierDec 15, 11May 20, 14QUALCOMM INCORPORATED
8421531 Low dissipation amplifierJul 06, 11Apr 16, 13THX LTD.
8183933 High-voltage impulse amplifierApr 03, 09May 22, 12LEHIGH UNIVERSITY
8159293 Nested transimpendance amplifierAug 17, 10Apr 17, 12MARVELL INTERNATIONAL LTD.
8004355 Low dissipation amplifierFeb 25, 10Aug 23, 11THX LTD.
7978007 Feedback network for cascaded amplifiersDec 29, 08Jul 12, 11Not available
7821335 Semiconductor integrated circuit with variable gain amplifierOct 16, 08Oct 26, 10RENESAS ELECTRONICS CORPORATION

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