@misc{indiciae25c1c9d3c01e,
  title = {Circuit multiplies pulse width modulation, exhibits linear transfer function},
  author = {Carlson, A. W. and Furciniti, A.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670000055},
  note = {Source identifier: 19670000055}
}