Text this: 3-state BTL closed-loop PWM Class D amplifiers

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