Patent ID: 7948269

Claim:
An output driver for driving a bus line coupled to an external resistor biased at a first voltage comprising: a first driving device comprising a first terminal, the first terminal coupled to a first node of the bus line, wherein the first driving device is configured to couple the bus line to a reference voltage when activated by a first control signal; an internal resistor comprising a first terminal coupled to the first terminal of the first driving device, and a second terminal coupled to a second voltage, wherein the first and second voltages are not equal and a potential difference between the first and second voltages is less than a potential difference between the second voltage and the reference voltage; a second driving device comprising a first terminal, the first terminal coupled to the first node of the bus line, wherein the second driving device is configured to couple the bus line to the second voltage when the second driving device is activated by a second control signal; and a controller configured to activate the second control signal a first fixed period of time after the first control signal is deactivated and deactivate the second control signal a second fixed period of time after expiration of the first fixed period of time and prior to a subsequent activation of the first control signal.