Crystal oscillator

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United States of America Patent

PATENT NO 9431959
APP PUB NO 20160099682A1
SERIAL NO

14965849

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A crystal oscillator, including: a voltage stabilizing unit, a transconductance unit, a feedback resistor, a crystal resonator and at least two ground capacitors. The voltage stabilizing unit includes a current source and a first branch circuit including PMOS and NMOS connected in series, PMOS has its source connected to output of the current source, PMOS and NMOS have their gates connected to drains thereof, and NMOS has its source connected to ground. The transconductance unit includes a second branch circuit including PMOS and NMOS connected in series, PMOS has its source connected to output of the voltage stabilizing unit, PMOS and NMOS have their gates connected to input of the crystal resonator and one end of the resistor, and have their drains connected to output of the crystal resonator and another end of the resistor. The capacitors are connected to two ends of the crystal resonator respectively and ground.

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Patent Owner(s)

Patent OwnerAddress
SHANGHAI EASTSOFT MICROELECTRONICS CO LTD200233 3F BUILDING 12 FENGHUANG GARDEN NO 1515 GUMEI ROAD XUHUI DISTRICT SHANGHAI SHANGHAI CITY SHANGHAI CITY 200233

International Classification(s)

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  • 2015 Application Filing Year
  • H03B Class
  • 375 Applications Filed
  • 331 Patents Issued To-Date
  • 88.27 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances2015201620172018201920200255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Liu, Ruijin Shanghai, CN 4 12
Tao, Jingjing Shanghai, CN 4 19
Zhang, Xu Shanghai, CN 514 2234

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Patent Citation Ranking

  • 6 Citation Count
  • H03B Class
  • 13.72 % this patent is cited more than
  • 9 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges5225944994201 - 1011 - 2021 - 3031 - 4041 - 5071 - 80020406080100120140160180200220240260280

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