Integrated circuit A:D converter - includes two voltage comparators receiving input and reference voltages to control output logic circuit

摘要

The analogue-digital converter uses two voltage comparators (A1, A2) each having two inputs and one output. A loading and discharging circuit (1) is coupled across two supply termainsl and a parallel circuit comprising a capacitor (C) and a switching device (Q1) controlled by a loading/discharging signal is connected between earth and the inversion input of one voltage comparator (A1). A logic circuit (L1..L4,..phi o, phi d) is used to interrupt the loading and for supplying the converted digital output signal (Vout) using the output signals from the two voltage comparators, in dependence on the capacitor charge.