Patent ID: 6046617
Filing Date: 2000-04-04
Classification: H03K

Abstract:
A level detection circuit for producing an output signal indicative of an input signal and switchable between an active mode and a standby mode, said level detection circuit comprising:a level detection stage having an input for receiving the input signal, said level detection stage having a first threshold voltage when a level detection stage output is at a first state and a second threshold voltage, different from the first threshold voltage, when the level detection stage output is at a second state;first enable circuitry coupled to the level detection stage for providing a current path through the level detection stage when the level detection circuit is in the active mode and for interrupting the current path when the level detection circuit is in the standby mode; anda storage device configured to store a value which represents the state of the level detection stage output prior to the level detection circuit switching from the active mode to the standby mode and to set the level detection stage output state to one of the first and second states based upon the stored value when the level detection circuit switches from the standby mode to the active mode.