Patent ID: 7786779
Filing Date: 2010-08-31
Classification: H03K

Abstract:
1. A buffer for a driving circuit, comprising: a first transistor, for providing a current to an output terminal; a second transistor, coupled to the first transistor, for sinking a current from the output terminal, wherein the first transistor is a first P MOSFET having a source terminal coupled to a predetermined voltage level, the second transistor is a first N MOSFET having a drain terminal coupled to a drain terminal of the first P MOSFET, and having a source terminal coupled to a ground level; a slew rate controlling circuit, coupled to the first transistor, the second transistor and an input signal, for controlling slew rate of at least one controlling signal for controlling the turning on and turning off operations of the first transistor and the second transistor according to the input signal; a managing circuit, coupled to the first transistor and the second transistor, for preventing the first transistor and the second transistor from turning on simultaneously, wherein the managing circuit includes: an enabling circuit, for enabling or disabling the slew rate controlling circuit and the managing circuit, comprising: