Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
INTEGRATED CIRCUITS WITH CONFIGURABLE INDUCTORS
Document Type and Number:
WIPO Patent Application WO/2011/119369
Kind Code:
A3
Abstract:
Integrated circuits with phase-locked loops are provided. Phase-locked loops may include an oscillator, a phase-frequency detector, a charge pump, a loop filter, a voltage-controlled oscillator, and a programmable divider. The voltage-controlled oscillator may include multiple inductors, an oscillator circuit, and a buffer circuit. A selected one of the multiple inductors may be actively coupled to the oscillator circuit. The voltage-controlled oscillators may have multiple oscillator circuits. Each oscillator circuit may be coupled to a respective inductor, may include a varactor, and may be powered by a respective voltage regulator. Each oscillator circuit may be coupled to a respective input transistor air in the buffer circuit through associated coupling capacitors. A selected one of the oscillator circuits may be turned on during normal operation by supplying a high voltage to the selected one of the oscillator circuit and by supply a ground voltage to the remaining oscillator circuits.

Inventors:
DING, Weiqi (44333 Parkmeadow Drive, Fremont, CA, 94539, US)
SHUMARAYEV, Sergey (12501 Corbetta Lane, Los Altos Hills, CA, 94022, US)
WONG, Wilson (126 Sylvan Drive, San Francisco, CA, 94132, US)
ATESOGLU, Ali (112 Images Circle, Milpitas, CA, 95035, US)
IPPILI, Sharat, Babu (965 East El Camino Real, Apt 738Sunnyvale, CA, 94087, US)
Application Number:
US2011/028465
Publication Date:
September 29, 2011
Filing Date:
March 15, 2011
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
ALTERA CORPORATION (101 Innovation Drive, San Jose, CA, 95134, US)
DING, Weiqi (44333 Parkmeadow Drive, Fremont, CA, 94539, US)
SHUMARAYEV, Sergey (12501 Corbetta Lane, Los Altos Hills, CA, 94022, US)
WONG, Wilson (126 Sylvan Drive, San Francisco, CA, 94132, US)
ATESOGLU, Ali (112 Images Circle, Milpitas, CA, 95035, US)
IPPILI, Sharat, Babu (965 East El Camino Real, Apt 738Sunnyvale, CA, 94087, US)
International Classes:
H03L7/099; H01F17/00
Foreign References:
US20070132524A12007-06-14
US20060158268A12006-07-20
US20030202331A12003-10-30
Other References:
See also references of EP 2553817A4
Attorney, Agent or Firm:
TREYZ, George, Victor (Treyz Law Group, 870 Market Street Suite 98, San Francisco CA, 94102, US)
Download PDF: