PA bias power supply undershoot compensation

US8958763B2 · kind B2 · utility

Assignee

• RF Micro Devices, Inc. · US

Inventors

• Stuart Williams · Lenexa, US
• Brian Baxter · Greensboro, US
• Brad Hunkele · Greensboro, US
• Hirofumi Honjo · Palo Alto, US
• Roman Zbigniew Arkiszewski · Oak Ridge, US
• David E. Jones · Layton, US
• Chris Levesque · Willow View Lane, US
• William David Southcombe · San Diego, US
• Scott Yoder · Fuquay-Varina, US
• Terry J. Stockert · Cedar Rapids, US

Key dates

• Filing date: Nov 29, 2011
• Grant date: Feb 17, 2015
• Expiry date: Nov 29, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03F2203/21157
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A charge pump of a power amplifier (PA) bias power supply and a process to prevent undershoot disruption of a bias power supply signal of the PA bias power supply are disclosed. The charge pump operates in one of multiple bias supply pump operating modes, which include at least a bias supply pump-up operating mode and a bias supply bypass operating mode. The process prevents selection of the bias supply pump-up operating mode from the bias supply bypass operating mode before charge pump circuitry in the charge pump is capable of providing adequate voltage to prevent undershoot disruption of the bias power supply signal.