Patents by Inventor Qiuzhong Wu

Qiuzhong Wu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Logarithmic scale analog to digital converter for wide dynamic range avalanche photodiode current companding
    Patent number: 10794761
    Abstract: An electronic circuit comprises an analog-to-digital converter (ADC) circuit. The ADC circuit includes a pre-amplifying transistor and a quantizer circuit. The pre-amplifying transistor includes a base, an emitter and a collector. The pre-amplifying transistor is configured to receive an input voltage at the base that varies logarithmically; and produce an output voltage at the collector according to a comparison of a reference voltage and a difference between the input voltage and a voltage at the emitter. The quantizer circuit is operatively coupled to the pre-amplifying transistor and is configured to generate a digital value for the input voltage using the output voltage produced by the pre-amplifying transistor.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: October 6, 2020
    Assignee: Linear Technology Holding LLC
    Inventors: Eric Stephen Young, Qiuzhong Wu, Xin Qi
  • LOGARITHMIC SCALE ANALOG TO DIGITAL CONVERTER FOR WIDE DYNAMIC RANGE AVALANCHE PHOTODIODE CURRENT COMPANDING
    Publication number: 20200149958
    Abstract: An electronic circuit comprises an analog-to-digital converter (ADC) circuit. The ADC circuit includes a pre-amplifying transistor and a quantizer circuit. The pre-amplifying transistor includes a base, an emitter and a collector. The pre-amplifying transistor is configured to receive an input voltage at the base that varies logarithmically; and produce an output voltage at the collector according to a comparison of a reference voltage and a difference between the input voltage and a voltage at the emitter. The quantizer circuit is operatively coupled to the pre-amplifying transistor and is configured to generate a digital value for the input voltage using the output voltage produced by the pre-amplifying transistor.
    Type: Application
    Filed: November 9, 2018
    Publication date: May 14, 2020
    Inventors: Eric Stephen Young, Qiuzhong Wu, Xin Qi