Kevin Michael Hoheisel, Age 521068 Cress Pkwy, Hiawatha, IA 52233

6680652, Jan 20, 2004

Aug 6, 2001

09/922676

Kevin Hoheisel - Hiawatha IA
Richard Hohneke - Cedar Rapids IA
Rohan Houlden - Cedar Rapids IA
Neal Mains - Marion IA
Stephen Oglesby - Cedar Rapids IA

RF Micro Devices, Inc. - Greensboro NC

H03F 304

330302, 330284, 330305

The present invention relates to controlling load impedance during wireless communications to maintain amplifier linearity for transmissions, such as voice and high-speed data, having significantly different peak-to-average power ratios. At a desired output power, a first load impedance is selected for transmissions having a first peak-to-average power ratio and a second load impedance is selected for transmissions having a second peak-to-average power ratio, in order to ensure that appropriate amplifier linearity is achieved for both voice and high-speed data transmissions. Preferably, amplifier efficiency is optimized for transmissions having the first and second peak-to-average power ratios. Changing the effective load impedance may be effected by providing a first impedance network and switching a second impedance network in association with the first impedance network.

7443246, Oct 28, 2008

Oct 21, 2003

10/691115

Paul Andrys - Swisher IA, US
Mark Bloom - Newbury Park CA, US
Hugh J. Finlay - Moorpark CA, US
David Ripley - Cedar Rapids IA, US
Terry Shie - Cedar Rapids IA, US
Kevin Hoheisel - Hiawatha IA, US

Skyworks Solutions, Inc. - Woburn MA

H03F 3/04

330296, 330285

A constant current bias approach that receives an input bias voltage and maintains a temperature independent constant current bias in a linear amplifier device. Integrated sense circuitry protects against unacceptable input voltages to guarantee bias stability. Fabrication in multiple semiconductor technologies and assembly into a single package allows for optimum cost and performance of DC bias and RF amplifier sections.

8130057, Mar 6, 2012

Apr 30, 2009

12/433377

David E. Jones - Cedar Rapids IA, US
Kevin M. Hoheisel - Hiawatha IA, US

RF Micro Devices, Inc. - Greensboro NC

H01P 5/12
H03H 7/38

333131, 333126, 333129, 333132

The present invention relates to a lumped cross-coupled Wilkinson circuit having a pair of magnetically cross-coupled inductive elements coupled to an isolation network. By magnetically cross-coupling the inductive elements, which have a mutual inductance, the inductance of each inductive element will be significantly less than the inductance of each inductive element in an equivalent lumped traditional Wilkinson combiner. Since the inductance of each inductive element is less, the size of each inductive element may be significantly smaller and the resistive loss of the each inductive element may be significantly smaller. In one embodiment of the present invention, the lumped cross-coupled Wilkinson circuit operates as a lumped cross-coupled Wilkinson combiner. In an alternate embodiment of the present invention, the lumped cross-coupled Wilkinson circuit operates as a lumped cross-coupled Wilkinson splitter.

6639470, Oct 28, 2003

Oct 21, 2000

09/693398

Paul Andrys - Swisher IA
Mark Bloom - Newbury Park CA
Hugh J. Finlay - Moorpark CA
David Ripley - Cedar Rapids IA
Terry Shie - Cedar Rapids IA
Kevin Hoheisel - Hiawatha IA

Skyworks Solutions, Inc. - Irvine CA

H03F 304

330296, 330285, 327309

A constant current bias approach that receives an input bias voltage and maintains a temperature independent constant current bias in a linear amplifier device. Integrated sense circuitry protects against unacceptable input voltages to guarantee bias stability. Fabrication in multiple semiconductor technologies and assembly into a single package allows for optimum cost and performance of DC bias and RF amplifier sections.