Invention Grant
US08289094B2 Voltage controlled oscillator (VCO) circuit with integrated compensation of thermally caused frequency drift 有权
压控振荡器(VCO)电路具有集成补偿的热引起的频率漂移

  • Patent Title: Voltage controlled oscillator (VCO) circuit with integrated compensation of thermally caused frequency drift
  • Patent Title (中): 压控振荡器(VCO)电路具有集成补偿的热引起的频率漂移
  • Application No.: US12997102
    Application Date: 2008-06-26
  • Publication No.: US08289094B2
    Publication Date: 2012-10-16
  • Inventor: Peter WennekersHao LiYi Yin
  • Applicant: Peter WennekersHao LiYi Yin
  • Applicant Address: US TX Austin
  • Assignee: Freescale Semiconductor, Inc.
  • Current Assignee: Freescale Semiconductor, Inc.
  • Current Assignee Address: US TX Austin
  • International Application: PCT/IB2008/052579 WO 20080626
  • International Announcement: WO2009/156793 WO 20091230
  • Main IPC: H03B5/08
  • IPC: H03B5/08
Voltage controlled oscillator (VCO) circuit with integrated compensation of thermally caused frequency drift
Abstract:
A voltage controlled oscillator circuit comprises a VCO resonator circuit having a first plurality of varactors for varying a frequency of the VCO resonator circuit, the VCO resonator circuit being symmetrical with respect to VCO circuit ground and providing a signal having a frequency, the frequency depending on a tuning voltage applied to the first plurality of varactors, and a second plurality of varactors for compensating a drift of the frequency depending on a compensation voltage, a temperature sensor circuit sensing an ambient temperature of the VCO resonator circuit and providing a temperature dependent signal, and a temperature compensation circuit providing the compensation voltage depending on the temperature dependent signal. Furthermore, a phase locked loop (PLL) circuit, an automotive radar device and a method for compensating a frequency drift of a VCO resonator circuit are presented.
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