Chao Quan Liu

US Patent:

20060040103, Feb 23, 2006

Filed:

Jun 7, 2005

Appl. No.:

11/147670

Inventors:

Jeffery Whiteford - Belmont CA, US
Rhett Brewer - Sunnyvale CA, US
Mihai Buretea - San Francisco CA, US
Jian Chen - Mountain View CA, US
Karen Cruden - Pleasanton CA, US
Xiangfeng Duan - Mountain View CA, US
William Freeman - San Mateo CA, US
David Heald - Solvang CA, US
Francisco Leon - Palo Alto CA, US
Chao Liu - San Jose CA, US
Andreas Meisel - San Francisco CA, US
Kyu Min - San Jose CA, US
J. Parce - Palo Alto CA, US
Erik Scher - San Francisco CA, US

Assignee:

NANOSYS, Inc. - Palo Alto CA

International Classification:

B32B 5/16

US Classification:

428403000

Abstract:

Ligand compositions for use in preparing discrete coated nanostructures are provided, as well as the coated nanostructures themselves and devices incorporating same. Methods for post-deposition shell formation on a nanostructure and for reversibly modifying nanostructures are also provided. The ligands and coated nanostructures of the present invention are particularly useful for close packed nanostructure compositions, which can have improved quantum confinement and/or reduced cross-talk between nanostructures.

US Patent:

20080032134, Feb 7, 2008

Filed:

Feb 13, 2007

Appl. No.:

11/706730

Inventors:

Jeffery Whiteford - Belmont CA, US
Rhett Brewer - Sunnyvale CA, US
Mihai Buretea - San Francisco CA, US
Jian Chen - Mountain View CA, US
Karen Cruden - Pleasanton CA, US
Xiangfeng Duan - Mountain View CA, US
William Freeman - San Mateo CA, US
David Heald - Solvang CA, US
Francisco Leon - Palo Alto CA, US
Chao Liu - San Jose CA, US
Andreas Meisel - San Francisco CA, US
Kyu Min - San Jose CA, US
J. Parce - Palo Alto CA, US
Erik Scher - San Francisco CA, US

Assignee:

NANOSYS, Inc. - Palo Alto CA

International Classification:

B32B 5/16
B32B 15/04
B32B 17/06

US Classification:

428402240

Abstract:

Ligand compositions for use in preparing discrete coated nanostructures are provided, as well as the coated nanostructures themselves and devices incorporating same. Methods for post-deposition shell formation on a nanostructure and for reversibly modifying nanostructures are also provided. The ligands and coated nanostructures of the present invention are particularly useful for close packed nanostructure compositions, which can have improved quantum confinement and/or reduced cross-talk between nanostructures.

US Patent:

41907477, Feb 26, 1980

Filed:

Apr 5, 1978

Appl. No.:

5/893795

Inventors:

Alexander Feiner - Rumson NJ
Chao Kai Liu - Matawan NJ
Sigurd G. Waaben - Princeton NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H04B 158
H04B 900

US Classification:

179170NC

Abstract:

A remote gain controlled optocoupled device is disclosed utilizing a DC reference voltage in the output section to compensate for variations in the optocoupling characteristics of the circuit. The DC voltage level output of the photodetector, which is a function of the light transfer characteristics of the circuit, is compared to a remotely controlled reference DC level. The output AC signal level, which substantially tracks the DC voltage output, is gain adjusted under control of the compared DC voltage levels.

US Patent:

41328701, Jan 2, 1979

Filed:

Nov 3, 1977

Appl. No.:

5/848208

Inventors:

Chao Kai Liu - Matawan NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H04M 100

US Classification:

179 81R

Abstract:

There is disclosed a protective coupler circuit of the circuit breaker type having a relay contact inserted in the communication line between the key telephone station and the central office in order to protect the central office line from hazardous voltages. A longitudinal unbalance detector is coupled with a metallic high voltage detector to control the relay operation. Circuitry is provided to operate in conjunction with the ring detection circuitry of the key telephone unit to insure proper circuit operation when ringing potential is present on the communication line even though that potential is over the threshold level of the hazardous voltage protector.

US Patent:

39912809, Nov 9, 1976

Filed:

May 23, 1975

Appl. No.:

5/580293

Inventors:

Dennis Bryan James - Rumson NJ
Chao Kai Liu - Matawan NJ
Robert McKee Smith - Holmdel NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H04M 356

US Classification:

179 18BC

Abstract:

In order to reduce the signal loss in a telephone line switching and conferencing system there is interposed between each line and the switching matrix a monobus port circuit arranged to convert a transmitted telephone signal into an equivalent current source. The currents from several monobus circuits are added in a bus resistor before distribution back to the individual monobus circuit where the original signal is subtracted from the bus signal. The resultant signal is transmitted to the telephone receiver. When the switching matrix crosspoint resistance is negligible, the component of the bus voltage measured at the current source output which results from current generated from each line is equal and opposite in magnitude to the voltage generated in the line. In any given line these voltages cancel each other, thereby eliminating the feedback signal. In situations where it is desired to use crosspoints having an unknown resistance, the voltage returned from the monobus does not exactly match the locally generated voltage because of the voltage drop across the crosspoint and thus a feedback signal of unknown magnitude is applied to the telephone line.

US Patent:

40041034, Jan 18, 1977

Filed:

Oct 15, 1975

Appl. No.:

5/622516

Inventors:

Chao Kai Liu - Matawan NJ
Douglas Charles Smith - Locust NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H04Q 342
H04Q 356

US Classification:

179 18EA

Abstract:

A plurality of idle paths through a multistage switching network which are capable of establishing a connection between a particular line and a particular trunk are identified. Repeated selection of paths identified as idle, but actually out-of-service, is avoided by selecting successively different ones of the identified idle paths in a pseudorandom manner to complete the connection between the line and the trunk. The pseudorandom path selection is accomplished in response to predetermined portions of a pseudorandom pattern of binary bits.

US Patent:

42283230, Oct 14, 1980

Filed:

Jan 31, 1979

Appl. No.:

6/008194

Inventors:

Alexander Feiner - Rumson NJ
Chao Kai Liu - Matawan NJ
Sigurd G. Waaben - Princeton NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H04B 900

US Classification:

179 16F

Abstract:

A gain and frequency compensated barrier circuit is disclosed for use with a telephone transmission line having variable loop lengths. A DC component of the input signal is provided to the input side of the barrier circuit. Loop length losses, as well as barrier gain variations, are adjusted on the output side of the circuit by comparing a barrier DC voltage level with a DC reference level and adjusting the AC gain in accordance therewith. Frequency response, which is also a function of loop length, is corrected by using the DC input voltage to generate an effective loop length dependent capacitor for further controlling the output signal level. An optocoupled circuit is disclosed for use in one embodiment of the disclosure.

US Patent:

40456153, Aug 30, 1977

Filed:

May 21, 1976

Appl. No.:

5/688787

Inventors:

Dennis Bryan James - Rumson NJ
Chao Kai Liu - Matawan NJ
Douglas Charles Smith - Rumson NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H04M 356

US Classification:

179 1CN

Abstract:

In order to reduce the signal loss in a telephone line switching and conferencing system there is interposed between each line and the switching matrix a monobus port circuit arranged to convert a transmitted telephone signal into an equivalent current source. An opto-coupled hybrid replaces the port circuit transformer and serves to provide the desired voltage to current conversion. The currents from several monobus circuits are added in a bus resistor before distribution back to the individual monobus circuits as a voltage where the original signal is subtracted from the bus signal. The resultant signal is transmitted to the telephone receiver via the opto-coupled hybrid. When the switching matrix crosspoint resistance is negligible, the component of the bus voltage measured at the current source output which results from current generated from each port circuit is equal and opposite in magnitude to the voltage generated in the port circuit. In any given line these voltages cancel each other, thereby eliminating the feedback signal.