Patent ID: 7633321

Claim:
A driver circuit for outputting a signal, comprising: an output, at least one transistor including a load section, the load section being coupled between said output and a supply voltage, and a circuit coupled to a control terminal of said at least one transistor to apply a control voltage to said control terminal in at least one operation mode of said driver circuit, wherein said control voltage is within a predetermined voltage range depending on a first predetermined voltage below a nominal voltage range of said output, wherein said supply voltage includes a first supply voltage and a second supply voltage, wherein said at least one transistor further comprises a first transistor, a second transistor, a third transistor and a fourth transistor, wherein load sections of said first transistor and said second transistor are coupled in series between a first supply voltage and said output, and wherein load sections of said third and fourth transistors are coupled in series between said output and a second supply voltage, said second supply voltage being greater than said first supply voltage.