TRUE INFORMATION PRINTING DEVICE Russian patent published in 1998 - IPC

FIELD: electronic engineering. SUBSTANCE: device has printing head with N printing elements. First N leads of printing head electromagnets are connected to collectors of N transistors, and second N leads are interconnected and connected to power supply source through switch. Control input of power source is connected to N+1 output of central processor. Bases of N transistors are connected to N output of central processor through buffer register, and emitters of N transistors are connected to common wire of power supply source, comparison device and Schmitt triggers through N resistors. In this case, emitters of N transistors are connected to inputs of N Schmitt triggers the outputs of which are connected to first group of N inputs of comparison device, and second group of N inputs of comparison device is connected to N outputs of central processor which has input circuit connected to comparison device output. EFFECT: enhanced printing process. 1 dwg