OUTPUT BUFFER
An output buffer (12) is provided for producing an output signal varying between a voltage on a first lien (22) and a voltage on a second line (36). First output circuitry (3, 4) is provided for pulling an output terminal (26) to the voltage on first line (22). Second output circuitry (6, 7) is provided for pulling output terminal (26) to the voltage on second line (36) in response to an input thereto. First feedback circuitry (2, 8) is provided for detecting a voltage spike on first line (22) and varying the input to first output circuitry (3 4) in response. Second feedback circuitry (5, 9) is provided for detecting a voltage spike on second line (36) and varying the input to second output circuitry (6, 7) in response.