Patents
US 8604873 B2: Ground partitioned power amplifier for stable operation
- Granted
- 2013-12-10
- Filed
- 2011-12-02 application 13310611
- Type
- Utility · 15 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Achievement of robust stability of a power amplifier (PA) that allows the sharing of the ground between the driver stages and the output stage is shown. A controlled amount of negative feedback is used to neutralize the local positive feedback that results from the driver-to-output stage ground sharing in the signal path, for example, a radio frequency (RF) signal path. The solution keeps a strong drive and a good performance of the PA. Exemplary embodiments are shown for the PA positive feedback neutralization. A first embodiment uses a ground signal divider while another embodiment uses a ground signal divider weighting technique.
Source: PVGPATDIS, file of 2026-04-10 (ipg131210.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| RF Micro Devices (Cayman Islands), Ltd. 10 patents | Foreign company or organization | Greensboro, NC | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Baker Scott | San Jose, CA | 251 | PVGPATDIS, file of 2026-04-10 | |
| George Maxim | Milpitas, CA | 296 | PVGPATDIS, file of 2026-04-10 | |
| Stephen James Franck | Felton, CA | 19 | PVGPATDIS, file of 2026-04-10 | |
| Chu-hsiung Ho | Milpitas, CA | 5 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| H03F | Amplifiers | H03F1/30 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2016-06-14 | Name change Change of name | TRIQUINT INTERNATIONAL PTE. LTD. signed 2016-05-02 | QORVO INTERNATIONAL PTE. LTD. AVENUE 1, #04-01 | 38991/899 | ECORSEXC, file of 2026-09-25 |
| 2016-05-06 | Assignment Assignment of assignor's interest | RF MICRO DEVICES (CAYMAN ISLANDS), LTD. signed 2016-05-02 | TRIQUINT INTERNATIONAL PTE. LTD. AVENUE 1, #04-01 | 38485/869 | ECORSEXC, file of 2026-09-25 |
| 2012-11-29 | Assignment Assignment of assignor's interest | AMALFI SEMICONDUCTOR, INC. signed 2012-11-08 | RF MICRO DEVICES (CAYMAN ISLANDS), LTD. GREENSBORO, NC | 29375/148 | ECORSEXC, file of 2026-09-25 |
| 2012-07-02 | Assignment Assignment of assignor's interest | FRANCK, STEPHEN signed 2011-12-02 HO, CHU HSIUNG signed 2011-12-02 MAXIM, GEORGE signed 2011-12-02 SCOTT, BAKER signed 2011-12-02 | AMALFI SEMICONDUCTOR, INC. LOS GATOS, CA | 28476/943 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.