AMP OUTPUT PROCTECTIVE CIRCUIT FOR LCD PANEL SOURCE DRIVER

摘要

An AMP output protective circuit for an LCD panel source driver is disclosed. To solve a problem that internal diodes of PMOS/NMOS of an AMP output circuit are turned on, embodiments are characterized in making input and output voltages of the AMP in a charge sharing interval equal to HVDD and short-circuiting outputs of PAMP and NAMP with VRST_GH and VRST_GL lines, respectively. Accordingly, since there is no increase of voltage (Vth) attributed to a body effect, a speed is not reduced. An additional body bias control circuit is unnecessary. Power consumption can be reduced. Also, an AMP circuit can be more safely protected by adding an output reset function and an AMP protecting circuit.