Abstract: An electronic half-tone generating circuit for enabling a black and white facsimile transmission system to accurately and efficiently transmit and reproduce images including shades of grey as well as black and white and including an integrator responsive to a first data signal and operative to integrate the difference between an input analog signal and a first reference potential to develop a first integral signal commensurate therewith, and responsive to a second data signal and operative to integrate the difference between the input analog signal and a second reference signal to develop a second integral signal commensurate therewith, a comparator responsive to the first and second integral signals and operative to develop a comparison signal when the first and second integral signals exceed a predetermined threshold value, and a signal generator responsive to the comparison signal and operative to develop the first data signal upon each odd numbered occurrence of the comparison signal and to develop the se