Title:
SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/101981
Kind Code:
A1
Abstract:
A frequency voltage converter circuit (13) is configured from a switching unit, which is further configured from switches (SW1, SW2); electrostatic capacitance elements (C, C10-C13); and switches (CSW0-CSW3). The electrostatic capacitance elements (C10-C13) are further configured of materials having different absolute values of capacitance, and are disposed so as to cover the designer's intended frequency range. With electrostatic capacitance values, for example, the electrostatic capacitance elements (C11-C13) that have a weighting of 2, for example, are selected by the switches (CSW0-CSW3), and frequency switching carried out, on the basis of 4-bit frequency adjustment control signals (SELC0-SELC3).
Inventors:
NAKAMURA TAKASHI (JP)
YAYAMA KOSUKE (JP)
YAYAMA KOSUKE (JP)
Application Number:
PCT/JP2010/052533
Publication Date:
August 25, 2011
Filing Date:
February 19, 2010
Export Citation:
Assignee:
RENESAS ELECTRONICS CORP (JP)
NAKAMURA TAKASHI (JP)
YAYAMA KOSUKE (JP)
NAKAMURA TAKASHI (JP)
YAYAMA KOSUKE (JP)
International Classes:
H03L1/02; H03L7/06
Foreign References:
| JP2007318760A | 2007-12-06 | |||
| JP2006086997A | 2006-03-30 | |||
| JP2002300027A | 2002-10-11 |
Attorney, Agent or Firm:
TSUTSUI, YAMATO (JP)
Tsutsui Daiwa (JP)
Tsutsui Daiwa (JP)
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Claims: