Patent ID: 9117505
Filing Date: 2015-08-25
Classification: G11C

Abstract:
1. A voltage generation circuit comprising: a charge unit configured for raising a level of a ramp voltage to a predetermined level in response to a control signal; and a discharge unit configured for lowering the level of the ramp voltage in response to the control signal, wherein the discharge unit uses a constant current source to lower the level of the ramp voltage, wherein the charge unit includes a voltage applying section coupled to a first switching section and the first switching section coupled to a first capacitor and the discharge unit, wherein the constant current source of the discharge unit is configured to discharge the first capacitor in response to the control signal, received by both the first switching section and the discharge unit, thereby continuously and linearly lowering the level of the ramp voltage, and wherein the charge unit is configured for receiving level setting signals to raise the level of the ramp voltage to the predetermined level.