Patent ID: 6731151
Filing Date: 2004-05-04
Classification: G09G,H03K

Abstract:
An apparatus for providing an output voltage comprising:an output circuit being adapted for outputting an output signal having a first signal range, said output circuit comprising a first part and a second part, each of said first part and second part having an input terminal, wherein said first signal range being between a third voltage level and a fourth voltage level; and at least one input circuit, said at least one input circuit being adapted for inputting an input signal having a second signal range and at least a two-level strobe voltage, said input signal comprising at least a two-level input voltage, and second signal range being lower than said first signal range, said at least one input circuit being further adapted for setting a first at least one of said input terminals to a voltage level related to said input voltage when a strobe voltage is set to a first voltage level, aid said input circuit being further adapted for electrically isolating a second at least one of said input terminals when said strobe voltage is set to a second voltage level, wherein said second at least one of said input terminals may include said first at least one of said input terminals, said at least one input circuit further comprises a switch, said switch having a first end connected to said third voltage level and a second end connected to a third at least one of said input terminals and said switch being adapted for setting said third at least one of said input terminals to said third voltage level when the switch is active and a one-way conducting element, said one-way conducting element connected to said third at least one of said input terminals and to said second end of said switch and said one-way conducting element being adapted for setting said third at least one of said input terminals to a voltage level lower than said third voltage level when said switch is inactive, wherein said third at least one of said input terminals may include one of said first at least one of said input terminals and said second at least one of said input terminals.