Patent ID: 6265914
Filing Date: 2001-07-24
Classification: H03K

Abstract:
A predriver for driving an output data buffer at high frequencies, the predriver comprising:a data input;a data output;a first voltage pull-up circuit coupled to the data output for pulling the data output toward a first voltage and having a control terminal coupled to the data input;a first voltage pull-down circuit coupled to the data output for pulling the data output toward a second voltage, which is lower than the first voltage, and having a control terminal coupled to the data input, wherein the first voltage pull-down circuit, when active, is adapted to hold the data output above a selected voltage, which is greater than the second voltage, for at least a time period;a delay circuit coupled to the data input and having a time delay from the data input to an output of the delay circuit, which is at least as great as the time period; anda second voltage pull-down circuit coupled to the data output and having a control terminal coupled to an the output of the delay circuit.