ANALOG-TO-DIGITAL CONVERTER WITH CODE NEGATIVE FEEDBACK CIRCUIT Russian patent published in 1997 - IPC

FIELD: automation and instruments, computer engineering, radio engineering. SUBSTANCE: device has binary counter 1 which has reset terminal 2, n+1 NAND gates 3.1, ..., 3.n+1, control input 4, pulse generator output 5, resistor matrix 6 which has weight resistors 7.1, ..., 7.n, first operational amplifier 8, resistor 9, voltage scaling circuit 10, direct voltage power supply 11, resistor 12, second operational amplifier 13, voltage scaling circuit 14, diode 15, two-position gates 16 and 17, comparator 18, third operational amplifier 19, resistor matrix 20, which has resistors 21.1., ..., 21.4, input terminal 22, inverter 23 and additional NAND gates 24.1, .. . , 24.2n. EFFECT: increased functional capabilities due to conversion of signals of different polarity. 1 dwg