Song Liu

US Patent:

6947456, Sep 20, 2005

Filed:

Dec 12, 2000

Appl. No.:

09/735315

Inventors:

Jesse Chin - Hillsborough CA, US
Miaobin Gao - San Jose CA, US
Robert Elsheimer - San Jose CA, US
Matthew Scott Abrams - Santa Clara CA, US
Heng-ju Cheng - Mountain View CA, US
Takashi Hidai - Palo Alto CA, US
Myunghee Lee - San Jose CA, US
Song Liu - San Jose CA, US

Assignee:

Agilent Technologies, Inc. - Palo Alto CA

International Classification:

H01S003/00
H01S003/30
H01S003/13

US Classification:

372 3802, 372 8, 372 381, 372 3801, 372 3808, 372 2901

Abstract:

A laser driver for generating drive waveforms that are suitable for driving a single VCSEL or an array of VCSELs. A digital controller is integrated into the laser driver and is utilized to initially program and selectively adjust during the operation of the driver one or more of the following VCSEL drive waveform parameters: (1) bias current, (2) modulation current, (3) negative peaking depth, and (4) negative peaking duration. The laser driver has an aging compensation mechanism for monitoring the age of the laser and for selectively adjusting the dc and ac parameters of the VCSEL drive waveform to compensate for the aging of the laser. The laser driver also has a temperature compensation mechanism for monitoring the temperature of the driver IC and selectively adjusting the dc and ac parameters of the VCSEL drive waveform to compensate for the changes in temperature.

US Patent:

7215274, May 8, 2007

Filed:

Aug 26, 2005

Appl. No.:

11/213393

Inventors:

Song Liu - Cupertino CA, US

Assignee:

Agere Systems Inc. - Allentown PA

International Classification:

H03M 1/12

US Classification:

341156, 341122, 341155

Abstract:

Multi-step sub-ranging analog-to-digital converters (ADCs) utilize a plurality of converter modules to generate sub-ranges of bits for a digital output signal during a multi-phase conversion cycle. Each subsequent converter utilizes reference voltage levels corresponding to conversions performed by prior converters during the timing phases of the conversion cycle. Settling time for these reference voltages, which limits the speed and/or accuracy of each conversion, may be reduced by pre-charging the reference input nodes of the subsequent converters using the analog input signal during a timing phase in which a prior converter is converting the analog input signal to generate one of the sub-ranges for the digital output signal.

US Patent:

8004807, Aug 23, 2011

Filed:

Jan 31, 2008

Appl. No.:

12/023111

Inventors:

Song Liu - Cupertino CA, US
Ramesh Prakash - Campbell CA, US
Guoxing Wang - Santa Clarita CA, US

Assignee:

Agere Systems Inc. - Allentown PA

International Classification:

H02H 3/20
H02H 9/04
H02H 9/00

US Classification:

361 911, 361 56

Abstract:

An overvoltage protection circuit includes a shunt circuit adapted for connection to at least one circuit node to be protected from an overvoltage condition and a voltage generator coupled to the shunt circuit. The shunt circuit is selectively activated as a function of a control signal supplied to the shunt circuit. The voltage generator is operative to generate the control signal for activating the shunt circuit during the overvoltage condition. The control signal has a level which varies in a manner that at least partially changes offsets in activation threshold of the shunt circuit.

US Patent:

8179194, May 15, 2012

Filed:

Apr 30, 2010

Appl. No.:

12/771944

Inventors:

Minsheng Li - Santa Clara CA, US
Gong Tom Lei - Austin TX, US
Song Liu - Cupertino CA, US
Jun Xiong - Santa Clara CA, US
Yincai Liu - Santa Clara CA, US
Feiqin Yang - Fremont CA, US
Zu Xu Qin - Sunnyvale CA, US

Assignee:

FutureWei Technologies, Inc. - Plano TX

International Classification:

G05F 1/10

US Classification:

327541

Abstract:

In one embodiment, a circuit for generating a reference voltage between a first output and a second output, has a first follower transistor that includes a first control node, a first follower node coupled to a first output, and a first supply node, and a second follower transistor that includes a second control node, a second follower node coupled to a second output and a second supply node. A first voltage drop circuit is coupled between a circuit supply node and the second supply node. The circuit is biased such that the voltage between the circuit supply node and the second supply node is greater than the voltage between the circuit supply node and the first supply node, and such that the voltage between the circuit supply node and the second control node is greater than the voltage between the circuit supply node and the first control node.

US Patent:

20140052764, Feb 20, 2014

Filed:

Aug 15, 2012

Appl. No.:

13/585967

Inventors:

Amir Meir Michael - San Mateo CA, US
Song Liu - Fremont CA, US
Jason Matthew Taylor - Berkeley CA, US
Yael Maguire - Boston MA, US
Per Brashers - Oakland CA, US
Eitan Frachtenberg - Palo Alto CA, US

International Classification:

G06F 17/30

US Classification:

707822, 707E1701

Abstract:

A file storage system may be implemented by coordinating non-exhaustible and exhaustible storage devices. The exhaustible storage devices may be lower grade flash based storage devices. The non-exhaustible storage devices may be storage devices based on magnetic recording mechanisms or higher grade flash storage. The file storage system may store received content items on the exhaustible storage devices. The file storage system may additionally store metadata for the content items and/or the file storage system on the non-exhaustible storage devices. During operation, the file storage system may globally optimize the content items on the exhaustible storage devices such that more heavily accessed items are moved to exhaustible storage devices that have experienced relatively few data operations. The file storage system can move less frequently accessed content items to exhaustible storage devices that have experienced a relatively large number of data operations. As such, the operation lifetime of the exhaustible storage devices as a whole can be prolonged.

US Patent:

20140067778, Mar 6, 2014

Filed:

Aug 31, 2012

Appl. No.:

13/601733

Inventors:

Dhruba Borthakur - Sunnyvale CA, US
Per Brashers - Oakland CA, US
Song Liu - Mountain View CA, US
Tomasz Nykiel - Palo Alto CA, US

Assignee:

Facebook, Inc. - Menlo Park CA

International Classification:

G06F 17/30

US Classification:

707694, 707E17005

Abstract:

A method of operation of a storage control system includes: configuring a state change policy on a data server, the state change policy including an online duration for a storage device; activating the storage device based on the state change policy; mounting the storage device based on the state change policy; and scheduling a filesystem maintenance task to be performed on the storage device based on the state change policy.

US Patent:

20220341928, Oct 27, 2022

Filed:

Apr 22, 2022

Appl. No.:

17/726839

Inventors:

- Milpitas CA, US
Olivia Mark - San Jose CA, US
Song Liu - San Jose CA, US
Prerna Bhargava - Sunnyvale CA, US

Assignee:

ID-Fish Technology, Inc. - Milpitas CA

International Classification:

G01N 33/569
G01N 33/547

Abstract:

The disclosure, in some aspects, provides a composition comprising labelled and/or tagged and/or bound amino acid sequences useful for the detection of species. Also disclosed are methods for the detection of infection by one or more species.

US Patent:

20220260586, Aug 18, 2022

Filed:

Feb 11, 2022

Appl. No.:

17/669979

Inventors:

- Milpitas CA, US
Song Liu - San Jose CA, US
Prerna Bhargava - Sunnyvale CA, US

Assignee:

ID-Fish Technology, Inc. - Milpitas CA

International Classification:

G01N 33/68
C07K 14/005

Abstract:

Compositions and methods for immunological detection of coronavirus antibodies are provided.