Craig A Andrews

US Patent:

7167054, Jan 23, 2007

Filed:

Dec 2, 2004

Appl. No.:

11/002473

Inventors:

David Dening - Stokesdale NC, US
Craig Andrews - Austin TX, US
Michael R. Kay - Summerfield NC, US
Jackie Johnson - Trinity NC, US
Ulrik Riis Madsen - Herning, DK

Assignee:

RF Micro Devices, Inc. - Greensboro NC

International Classification:

H03F 3/04

US Classification:

330297, 330296

Abstract:

Power control circuitry that is configurable as either a Low Dropout (LDO) voltage regulator or a switching DC—DC converter for controlling a variable supply voltage provided to a power amplifier of a mobile terminal is provided. The power control circuitry includes an output stage including first and second output transistors, an analog control system, and a digital control system. When in LDO voltage regulator mode, the analog control system provides an analog control signal to the first transistor based on an adjustable power control signal and a feedback signal indicative of the variable supply voltage, and the digital control system operates to disable the second output transistor. When in DC—DC converter mode, an output stage of the analog control system is disabled, and the digital control system provides binary control signals to the first and second transistors based on the adjustable power control signal and the feedback signal.

US Patent:

59111216, Jun 8, 1999

Filed:

May 23, 1996

Appl. No.:

8/652374

Inventors:

Craig A. Andrews - Raleigh NC

Assignee:

Ericsson Inc. - Research Triangle Park NC

International Classification:

H04B 138

US Classification:

455418

Abstract:

A mobile telephone has a programmable controller for controlling the operation of the mobile telephone. The programmable controller has a plurality of selectable program configurations. An interchangeable component of the mobile telephone, such as the front cover of the housing, includes a program selector for indicating a selected program configuration. A detection circuit detects the program selector and generates a configuration signal representing the selected program configuration. The programmable controller is responsive to the configuration signal generated by the detection circuit to configure the control program according to the selected program configuration.