Patent ID: 7671854
Filing Date: 2010-03-02
Classification: G09G

Abstract:
1. A high-potential output stage comprising: an output circuit to power a load with a variable high potential when it receives a low-level active input logic signal; a driving circuit producing a high-level control logic signal as a function of the input logic signal, to drive the output circuit, wherein the driving circuit is powered by a direct high potential; a detector circuit to synchronize the input logic signal with variations of the variable high potential, the driving circuit producing the control logic signal as a function of the synchronized input logic signal, wherein the detector circuit comprises a detector to detect the level of the variable high potential and produce a validation signal that becomes active when the variable high potential starts increasing from a reference value, then inactive when the variable high potential starts decreasing from the value of the direct high potential, wherein the direct high potential and the reference value comprise different DC voltages; and a logic gate to combine the validation signal and the input logic signal.