DERALD O CUMMINGS
Engineers in State College, PA
License number
Pennsylvania PE021451E
Category
Engineers
Type
Professional Engineer
Address
Address
State College, PA 16801
Professional information
Principal Engineer At Arris/C-Cor
Position:
Principal Engineer at Arris/C-COR, Principal Engineer at ARRIS Group, Inc., Principal Engineer at ARRIS, Principal Engineer at C-COR
Location:
State College, Pennsylvania Area
Industry:
Telecommunications
Work:
Arris/C-COR
-
Principal Engineer
ARRIS Group, Inc.
since 2008
-
Principal Engineer
ARRIS
since 2008
-
Principal Engineer
C-COR
since 2005
-
Principal Engineer
Penn State University
1991 - 1997
-
Associate Professor of EE
Education:
Penn State U. 1972
Amplitude And Phase Transfer Linearization Method And Apparatus For A Wideband Amplifier
US Patent:
6580319, Jun 17, 2003
Filed:
Apr 19, 2001
Appl. No.:
09/838687
Inventors:
Derald O. Cummings - State College PA
John C. Pavlic - Port Matilda PA
Robert C. Ritter - Bellefonte PA
John C. Pavlic - Port Matilda PA
Robert C. Ritter - Bellefonte PA
Assignee:
C-COR.net Corp. - State College PA
International Classification:
H03F 126
US Classification:
330149, 330144, 330289
Abstract:
In a transfer linearization (TL) circuit one or more biased nonlinear elements form a nonlinear attenuator and a biased network to allow adjustment of diodes to linearize the overall transfer of the TL circuit and an amplifier being linearized. The transfer linearization circuit reduces distortion encountered in a broadband RF amplifier. The circuit compensates for attenuation of amplified broadband signals in CATV systems. The transfer linearization circuit provides low insertion loss and requires very low power consumption. Nearly constant impedance and constant insertion loss is provided across a wide frequency range and reduces both in-band and out-of-band third order distortions. The TL circuit exhibits instantaneous amplitude and phase transfer correction. No tuned frequency selective components are required so that adjustments are relatively straightforward.