DEVICE FOR ANALOG-TO-DIGITAL CONVERSION OF MEASURED VOLTAGE Russian patent published in 2008 - IPC H03M1/52 

FIELD: radio engineering.

SUBSTANCE: invention is referred to a device of analog-to digital conversion of measuring voltage (U_e), which includes analog-to-digital converter (1) that further includes integrating circuit (2) with operating amplifier (ОР1), resistor (R), and capacitor (С) in its feedback circuit where reference voltage (U_ref) is applied to inverting input of the operating amplifier (ОР1) and measuring voltage (U_e) is applied to non-inverting input of the operating amplifier (ОР1). The capacitor (С) is charged during charging period (t₁) and discharged during discharging period (t₂), the analog-to-digital converter (1) further includes comparator (3) connected to operating amplifier (ОР1), memory element (4) connected to comparator (3), time generator (6) creating charging period (t₁), and counter (8) that is implemented with the possibility to detect pulse edges and duration (T=t₁+t₂) of the period of pulse-width modulated output signal (U_out) formed by the analog-to-digital converter (1) at the output. Also synchronizing element (5) is provided with the possibility to synchronize at least within a predefined duration (X) measurements of edges of pulse-width modulated output signal with cycle of the counter (8).

EFFECT: possibility to obtain results of voltage measurement in digital format.

13 cl, 4 dwg