GRAPHIC INFORMATION READ-OUT DEVICE Russian patent published in 1996 - IPC

FIELD: peripheral computer devices. SUBSTANCE: device has graphic tablet 1 in the form of two sets of relatively orthogonal coordinate buses, coordinate builder 2, phase-modulated signal shaping unit 3, generator 4, counter 5, register 6, and harmonic-signal shaper 7. Introduced in addition are coordinate change-over and computation unit 8, register 9, flip-flops 10-11, comparator 12, matching resistor 13, and switch 14. EFFECT: improved measurement accuracy of read-out information coordinates due to checking and accounting for phase shift caused by changes in parameters of device components. 1 dwg