Patent ID: 6542004
Filing Date: 2003-04-01
Classification: H03K

Abstract:
A circuit for implementing an output buffer with ON resistance and skew control, comprising:a control section; an output section including a first output switch and a second output switch; and a pre-buffer section having a circuit configured to generate first and second output control signals in response to current sources and an input signal, in which a first voltage at a first control terminal of a first control switch of the control section is switchably transferred to a first output control signal and a second voltage at a second control terminal of a second control switch of the control section is switchably transferred to a second output control signal, wherein the first output control signal is coupled to the first output switch and the second output control signal is coupled to the second output switch, wherein the ON resistance of the first control switch of the control section sets the ON resistance of the first output switch and the ON resistance of the second control switch of the control section sets the ON resistance of the second output switch, wherein variations in ringing and skew are limited, wherein at least one of said current sources is derived by forcing an internally generated bandgap reference voltage across an external resistor.