Helen H Kim

US Patent:

D459545, Jun 25, 2002

Filed:

Sep 27, 1999

Appl. No.:

29/111467

Inventors:

Meesook Choe - West Orange NJ
Helen Kim - Lincoln Park NJ
Toni Laspina - New York NY

Assignee:

LOreal S.A. - Paris

International Classification:

2803

US Classification:

D28 20, D28 76, D9519, D9520, D9529, D9548, D9552

US Patent:

6466628, Oct 15, 2002

Filed:

Apr 18, 1998

Appl. No.:

09/061845

Inventors:

Helen Haeran Kim - Holmdel NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H03G 320

US Classification:

375297, 455126, 330284, 330 85

Abstract:

In a wireless transmitter, a class B or class C amplifier is used as a power amplifier for boosting the power level of a signal to be transmitted. To linearize the power amplifier, a feedback mechanism is included in the transmitter. The feedback mechanism provides for adjustment of a feedback gain which affects the overall gain of the signal, thereby effectively controlling the signal power level. In addition, a phase difference between components of the signal and the feedback versions thereof is corrected to increase the linearity of the power amplifier and stabilize the feedback mechanism.

US Patent:

6940924, Sep 6, 2005

Filed:

Aug 15, 2000

Appl. No.:

09/639259

Inventors:

Helen H. Kim - Holmdel NJ, US
Meng-Lin Yu - Morganville NJ, US

Assignee:

Agere Systems Inc. - Allentown PA

International Classification:

H03H007/40
H04L027/06
H04L001/00

US Classification:

375340, 375232, 375346

Abstract:

A receiver for a received signal having two or more different data levels comprises two or more channel estimators, (at least) one channel estimator for each different data level, where each channel estimator preferably implements an adaptive 2order or higher model of the transmission channel over which the received signals was transmitted to generate an estimated signal for one of the different data levels. The receiver also has a comparator that compares the current received signal to the estimated signals generated by the different channel estimators to select an output data value for the current received signal. The adaptive model of the transmission channel has coefficients that are dynamically controlled based on an error signal generated by the comparator. Each channel estimator relies on an output signal generated by an adaptive equalizer. In preferred shared-component implementations, each adaptive equalizer is shared by two or more different channel estimators, and, in one possible preferred shared-component implementation, all of the different channel estimators share a single adaptive equalizer.

US Patent:

56190581, Apr 8, 1997

Filed:

Feb 17, 1994

Appl. No.:

8/197895

Inventors:

Helen H. Kim - Holmdel NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H01L 2714
H01L 3100

US Classification:

257431

Abstract:

An integrated circuit device with a light-emitting diode thereon is disclosed. The device has discrete regions which function in concert to emit light when a suitable amount of voltage is provided. The device has four discrete regions: a first doped silicon region; a second silicon dioxide region; a third organic material region; and a fourth conducting material region. The first and fourth regions are electrodes which inject holes and electrons into the conducting organic material. The second region lowers the energy barrier between the first and third regions which improves the efficiency with which the polymer emits light. The diode of the present invention is fabricated on an integrated circuit using conventional integrated circuit fabrication techniques.

US Patent:

D4387899, Mar 13, 2001

Filed:

Sep 27, 1999

Appl. No.:

D/111468

Inventors:

Meesook Choe - West Orange NJ
Helen Kim - Lincoln Park NJ
Toni Laspina - New York NY

Assignee:

L'Oreal S.A. - Paris

International Classification:

0901

US Classification:

D 9338