Steven P Selby

US Patent:

8548398, Oct 1, 2013

Filed:

Feb 1, 2011

Appl. No.:

13/019077

Inventors:

Brian Baxter - Greensboro NC, US
Jason Millard - High Point NC, US
Roman Zbigniew Arkiszewski - Oak Ridge NC, US
Steven Selby - Lynchburg VA, US

Assignee:

RF Micro Devices, Inc. - Greensboro NC

International Classification:

H03C 1/62
H04B 17/00
H04B 1/04
H01Q 11/12

US Classification:

455 91, 4551151, 4551271, 4551274

Abstract:

The present disclosure relates to envelope power supply calibration of a multi-mode RF power amplifier (PA) to ensure adequate headroom when operating using one of multiple communications modes. The communications modes may include multiple modulation modes, a half-duplex mode, a full-duplex mode, or any combination thereof. As such, each communications mode may have specific peak-to-average power and linearity requirements for the multi-mode RF PA. As a result, each communications mode may have corresponding envelope power supply headroom requirements. The calibration may include determining a saturation operating constraint based on calibration data obtained during saturated operation of the multi-mode RF PA. During operation of the multi-mode RF PA, the envelope power supply may be restricted to provide a minimum allowable magnitude based on an RF signal level of the multi-mode RF PA, the communications mode, and the saturation operating constraint to provide adequate headroom.

US Patent:

20130342270, Dec 26, 2013

Filed:

Aug 27, 2013

Appl. No.:

14/010643

Inventors:

Jason Millard - High Point NC, US
Roman Zbigniew Arkiszewski - Oak Ridge NC, US
Steven Selby - Lynchburg VA, US

Assignee:

RF Micro Devices, Inc. - Greenboro NC

International Classification:

H03G 99/00

US Classification:

330127

Abstract:

The present disclosure relates to envelope power supply calibration of a multi-mode RF power amplifier (PA) to ensure adequate headroom when operating using one of multiple communications modes. The communications modes may include multiple modulation modes, a half-duplex mode, a full-duplex mode, or any combination thereof. As such, each communications mode may have specific peak-to-average power and linearity requirements for the multi-mode RF PA. As a result, each communications mode may have corresponding envelope power supply headroom requirements. The calibration may include determining a saturation operating constraint based on calibration data obtained during saturated operation of the multi-mode RF PA. During operation of the multi-mode RF PA, the envelope power supply may be restricted to provide a minimum allowable magnitude based on an RF signal level of the multi-mode RF PA, the communications mode, and the saturation operating constraint to provide adequate headroom.

US Patent:

20130344828, Dec 26, 2013

Filed:

Aug 27, 2013

Appl. No.:

14/010617

Inventors:

Jason Millard - High Point NC, US
Roman Zbigniew Arkiszewski - Oak Ridge NC, US
Steven Selby - Lynchburg VA, US

Assignee:

RF Micro Devices, Inc. - Greensboro NC

International Classification:

H04B 1/62

US Classification:

4551143

Abstract:

The present disclosure relates to envelope power supply calibration of a multi-mode RF power amplifier (PA) to ensure adequate headroom when operating using one of multiple communications modes. The communications modes may include multiple modulation modes, a half-duplex mode, a full-duplex mode, or any combination thereof. As such, each communications mode may have specific peak-to-average power and linearity requirements for the multi-mode RF PA. As a result, each communications mode may have corresponding envelope power supply headroom requirements. The calibration may include determining a saturation operating constraint based on calibration data obtained during saturated operation of the multi-mode RF PA. During operation of the multi-mode RF PA, the envelope power supply may be restricted to provide a minimum allowable magnitude based on an RF signal level of the multi-mode RF PA, the communications mode, and the saturation operating constraint to provide adequate headroom.

US Patent:

20130344833, Dec 26, 2013

Filed:

Aug 27, 2013

Appl. No.:

14/010630

Inventors:

Jason Millard - High Point NC, US
Roman Zbigniew Arkiszewski - Oak Ridge NC, US
Steven Selby - Lynchburg VA, US

Assignee:

RF Micro Devices, Inc - Greensboro NC

International Classification:

H03G 3/20

US Classification:

4552341

Abstract:

The present disclosure relates to envelope power supply calibration of a multi-mode RF power amplifier (PA) to ensure adequate headroom when operating using one of multiple communications modes. The communications modes may include multiple modulation modes, a half-duplex mode, a full-duplex mode, or any combination thereof. As such, each communications mode may have specific peak-to-average power and linearity requirements for the multi-mode RF PA. As a result, each communications mode may have corresponding envelope power supply headroom requirements. The calibration may include determining a saturation operating constraint based on calibration data obtained during saturated operation of the multi-mode RF PA. During operation of the multi-mode RF PA, the envelope power supply may be restricted to provide a minimum allowable magnitude based on an RF signal level of the multi-mode RF PA, the communications mode, and the saturation operating constraint to provide adequate headroom.