Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Nan Sun0
Miguel Gandara0
Date of Patent
May 7, 2019
Patent Application Number
15803081
Date Filed
November 3, 2017
Patent Citations Received
Patent Primary Examiner
Patent abstract
A variable gain amplifier utilizing positive feedback and time-domain calibration includes an integration phase and a regeneration phase. A current source provides a bias current that increases linearity in the integration phase and reduces common-mode voltage dependence. The circuit includes a timing control loop, wherein a variable gain of a residue amplifier is proportional to a first time that a timing control loop signal is kept high, as determined by an on or off status of respectively paired inverter assemblies each having an input voltage determined by an amplifier output voltage during the regeneration phase. A strong-arm latch structure acts as a positive feedback latch until the first time is de-asserted.
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