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  _____      ___       _____    ______   __   _   
 / ____||   / _ \\    / ___//  /_   _// | || | || 
/ //---`'  | / \ ||   \___ \\   -| ||-  | '--' || 
\ \\___    | \_/ ||   /    //   _| ||_  | .--. || 
 \_____||   \___//   /____//   /_____// |_|| |_|| 
  `----`    `---`   `-----`    `-----`  `-`  `-`

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Text this: A low-voltage CMOS OTA with rail-to-rail differential input range