Grant A Small

US Patent:

7948305, May 24, 2011

Filed:

Apr 24, 2009

Appl. No.:

12/430022

Inventors:

Mikhail S. Shirokov - Methuen MA, US
Grant A. Small - Nashua NH, US

Assignee:

Triquint Semiconductor, Inc. - Hillsboro OR

International Classification:

G05F 3/16
H03L 5/00

US Classification:

327540, 327513, 323907, 323315, 330127

Abstract:

A circuit having a substrate, a generator with a field effect transistor (FET) portion and a heterojunction bipolar transistor (HBT) portion integrated in the substrate, a voltage-to-voltage conveyor integrated in the substrate, a bias circuit, and a power amplifier is disclosed.

US Patent:

7262657, Aug 28, 2007

Filed:

Mar 21, 2005

Appl. No.:

11/085931

Inventors:

Keith Nellis - Sherman Oaks CA, US
Andre Metzger - La Jolla CA, US
Grant Small - Hiawatha IA, US
Michael L. Hageman - Ely IA, US
Terry J. Shie - Cedar Rapids IA, US
Kerry Burger - Chandler AZ, US

Assignee:

Skyworks Solutions, Inc. - Woburn MA

International Classification:

H03G 3/20

US Classification:

330133, 330136

Abstract:

A method and apparatus for biasing an amplifying device whereby the bias current tracks the input power or the power level of a control signal to thereby efficiently match the bias current with needs of the amplifying device. This method and apparatus overcomes the drawbacks of the prior art by biasing, not for maximum output power, but for the power level of the input signal or the control signal. In one embodiment a current conditioner operates in connection with the self adjusting biasing circuit to scale or adjust, potentially on an exponential basis, the biasing current for one or more amplifier stages. A cancellation current source may be configured within the bias circuit to cancel unneeded current to further minimize current consumption.

US Patent:

6873211, Mar 29, 2005

Filed:

Sep 10, 2003

Appl. No.:

10/660154

Inventors:

Philip H. Thompson - Solon IA, US
Michael L. Hageman - Mt. Vernon IA, US
Grant Small - Hiawatha IA, US
Terry J. Shie - Cedar Rapids IA, US

Assignee:

Skyworks Solutions, Inc. - Irvine CA

International Classification:

H03G003/10

US Classification:

330285, 330296

Abstract:

According to an exemplary embodiment, a circuit arrangement includes a multi-mode bias circuit having a control voltage input, a mode control input for selecting between a linear mode and a saturation mode, and a bias output. The circuit arrangement further includes an amplifier having a bias input connected to the bias output of the multi-mode bias circuit, the amplifier having an RF input and an RF output. The multi-mode bias circuit causes the amplifier RF output power to be proportional to the RF input power when the mode control input selects the linear mode. Conversely, the multi-mode bias circuit causes the amplifier RF output power to be determined by the voltage at the control voltage input when the mode control input selects the saturation mode.