Class H03F : AMPLIFIERS
Subclass 1/04: Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11722103 | Real-time and adaptive radio-frequency power protection | Aug 12, 22 | Aug 08, 23 | RENESAS ELECTRONICS AMERICA INC. |
| 11444584 | Real-time and adaptive radio-frequency power protection | Jan 30, 21 | Sep 13, 22 | RENESAS ELECTRONICS AMERICA INC. |
| 11431369 | Self-calibrated multi-channel transmission system for a satellite payload | Oct 07, 19 | Aug 30, 22 | Thales |
| 11316479 | Load insensitive power amplifier with quadrature combiner | Oct 05, 20 | Apr 26, 22 | Cobham Advanced Electronic Solutions, Inc. |
| 10938355 | Real-time and adaptive radio-frequency power protection | Dec 20, 18 | Mar 02, 21 | Integrated Device Technology, Inc. |
| 10581422 | PWM modulator | Feb 27, 17 | Mar 03, 20 | Kabushiki Kaisha Toshiba |
| 10461699 | Switch-mode power amplifier for an RF transmitter employing digitally-controlled OOB harmonic attenuation techniques | Jan 03, 19 | Oct 29, 19 | Dialog Semiconductor B.V. |
| 10256776 | Steered current source for single-ended class-A amplifier | Aug 29, 18 | Apr 09, 19 | Western Electric Export Corporation |
| 10218320 | Vacuum tube audio amplifier | Aug 31, 17 | Feb 26, 19 | ECHOWELL ELECTRONICS CO., LTD. |
| 10063194 | Low voltage tube circuits | May 29, 17 | Aug 28, 18 | Not available |
| 9906196 | Hybrid switched mode amplifier | Sep 20, 16 | Feb 27, 18 | CIRRUS LOGIC, INC. |
| 9736586 | Condenser microphone | Dec 01, 16 | Aug 15, 17 | KABUSHIKI KAISHA AUDIO-TECHNICA |
| 9577582 | Method of reducing power dissipation in a switching amplifier and circuit implementing such method | Oct 13, 14 | Feb 21, 17 | STMICROELECTRONICS S.R.L. |
| 9515616 | Tunable tube amplifier system of a radio-frequency power generator | Dec 18, 14 | Dec 06, 16 | GENERAL ELECTRIC COMPANY |
| 9503023 | Class-D amplifier | Apr 01, 15 | Nov 22, 16 | NXP B.V. |
| 9431970 | Methods and apparatus for relatively invariant input-output spectral relationship amplifiers | Dec 07, 15 | Aug 30, 16 | Nace Engineering, Inc. |
| 9337786 | Multi-layer decoupling capacitor for a tube amplifier assembly | Dec 18, 14 | May 10, 16 | GENERAL ELECTRIC COMPANY |
| 9306517 | Resonant pre-driver for switching amplifier | Oct 14, 15 | Apr 05, 16 | PEREGRINE SEMICONDUCTOR CORPORATION |
| 9231526 | Power amplifier and transmission device | Nov 11, 14 | Jan 05, 16 | PANASONIC CORPORATION |
| 9102141 | Capacitive load driving circuit, ink jet printer, and fluid ejecting apparatus | Mar 30, 11 | Aug 11, 15 | SEIKO EPSON CORPORATION |
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