Patent ID: 6677804
Filing Date: 2004-01-13
Classification: G11C

Abstract:
A voltage switching circuit, comprising:an active voltage reference adapted to receive a mode signal, the active voltage reference operable responsive to the mode signal going active to generate a first reference voltage and operable responsive to the mode signal going inactive to terminate generation of the first reference voltage; a standby voltage reference operable to generate a second reference voltage; a multiplexer coupled to the active and standby voltage references and operable to apply the first reference voltage on an output responsive to a selection signal going active, and operable to apply the second reference voltage on the output responsive to the selection signal going inactive; and a delay circuit coupled to the multiplexer and adapted to receive the mode signal, the delay circuit operable responsive to the mode signal going active to drive the selection signal active a delay time after the mode signal goes active, and operable responsive to the mode signal going inactive to drive the selection signal inactive without the delay time.