Invention Grant
US08704691B2 Track-and-hold circuit for analog-to-digital converter with switched capacitor coupling of amplifier stage 有权
具有放大器级开关电容耦合的模数转换器的跟踪保持电路

  • Patent Title: Track-and-hold circuit for analog-to-digital converter with switched capacitor coupling of amplifier stage
  • Patent Title (中): 具有放大器级开关电容耦合的模数转换器的跟踪保持电路
  • Application No.: US13607073
    Application Date: 2012-09-07
  • Publication No.: US08704691B2
    Publication Date: 2014-04-22
  • Inventor: Oleksiy Zabroda
  • Applicant: Oleksiy Zabroda
  • Applicant Address: US CA San Jose
  • Assignee: LSI Corporation
  • Current Assignee: LSI Corporation
  • Current Assignee Address: US CA San Jose
  • Agency: Ryan, Mason & Lewis, LLP
  • Main IPC: H03M1/12
  • IPC: H03M1/12
Track-and-hold circuit for analog-to-digital converter with switched capacitor coupling of amplifier stage
Abstract:
A track-and-hold circuit comprises at least first and second amplifier stages, and switched capacitor circuitry coupled between the first and second amplifier stages. In a track mode of operation of the track-and-hold circuit, the switched capacitor circuitry is configured to decouple inputs of the second amplifier stage from respective outputs of the first amplifier stage and to couple the inputs of the second amplifier stage to a common mode voltage via respective first and second capacitors. In a hold mode of operation of the track-and-hold circuit, the switched capacitor circuitry is configured to couple the inputs of the second amplifier stage to the respective outputs of the first amplifier stage via the respective first and second capacitors. Multiple instances of the track-and-hold circuit may be implemented in parallel in a time-interleaved analog-to-digital converter.
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