Title:
INTEGRATED VOLTAGE-CONTROLLED OSCILLATOR CIRCUITS
Document Type and Number:
WIPO Patent Application WO/2010/093530
Kind Code:
A3
Abstract:
Techniques for providing voltage-controlled oscillator circuits having improved phase noise performance and lower power consumption. In an exemplary embodiment, a voltage controlled oscillator (VCO) is coupled to a mixer or a frequency divider such as a divide-by- two circuit. The VCO includes a transistor pair with magnetically cross-coupled inductors, and variable capacitance coupled to the gates of the transistor pair. In an exemplary embodiment, a frequency divider is configured to divide the frequency of the differential current flowing through the transistor pair to generate the LO output. In an alternative exemplary embodiment, a mixer is configured to mix the differential current flowing through the transistor pair with another signal. The VCO and mixer or frequency divider share common bias currents, thereby reducing power consumption. Various exemplary apparatuses and methods utilizing these techniques are disclosed.
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| JPH0618289 | [Title of Invention] Oscillation circuit |
Inventors:
CHAWLA VIPUL (US)
WANG SHEN (US)
WANG SHEN (US)
Application Number:
PCT/US2010/022937
Publication Date:
October 07, 2010
Filing Date:
February 02, 2010
Export Citation:
Assignee:
QUALCOMM INC (US)
CHAWLA VIPUL (US)
WANG SHEN (US)
CHAWLA VIPUL (US)
WANG SHEN (US)
International Classes:
H03B5/12
Foreign References:
| US6356602B1 | 2002-03-12 | |||
| US20080174378A1 | 2008-07-24 |
Other References:
LEUNG L L K ET AL: "A 1-V, 9.7mW CMOS Frequency Synthesizer for WLAN 802.11a Transceivers", VLSI CIRCUITS, 2005. DIGEST OF TECHNICAL PAPERS. 2005 SYMPOSIUM ON, IEEE, PISCATAWAY, NJ, USA LNKD- DOI:10.1109/VLSIC.2005.1469379, 16 June 2005 (2005-06-16), pages 252 - 255, XP010818423, ISBN: 978-4-900784-01-7
TO-PO WANG ET AL: "A Low-Power Oscillator Mixer in 0.18-.mu.m CMOS Technology", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, IEEE SERVICE CENTER, PISCATAWAY, NJ, US LNKD- DOI:10.1109/TMTT.2005.861671, vol. 54, no. 1, 1 January 2006 (2006-01-01), pages 88 - 95, XP001545158, ISSN: 0018-9480
DONGMIN PARK ET AL: "A 1.8 V 900 W 4.5 GHz VCO and Prescaler in 0.18 m CMOS Using Charge-Recycling Technique", IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 19, no. 2, 1 February 2009 (2009-02-01), pages 104 - 106, XP011250520, ISSN: 1531-1309
TO-PO WANG ET AL: "A Low-Power Oscillator Mixer in 0.18-.mu.m CMOS Technology", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, IEEE SERVICE CENTER, PISCATAWAY, NJ, US LNKD- DOI:10.1109/TMTT.2005.861671, vol. 54, no. 1, 1 January 2006 (2006-01-01), pages 88 - 95, XP001545158, ISSN: 0018-9480
DONGMIN PARK ET AL: "A 1.8 V 900 W 4.5 GHz VCO and Prescaler in 0.18 m CMOS Using Charge-Recycling Technique", IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 19, no. 2, 1 February 2009 (2009-02-01), pages 104 - 106, XP011250520, ISSN: 1531-1309
Attorney, Agent or Firm:
XU, Jiayu (5775 Morehouse DriveSan Diego, CA, US)
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