Method for bias rail buffering

A method for providing a stable reference signal from a bias rail supply, said method comprising the steps of.

• receiving a bias rail supply reference into a bias rail buffer circuit, said bias rail buffer circuit having a first pair of complementary transistors comprising a first transistor and a second transistor, said second transistor having a base and a collector connected together;
• providing an output current reference to an output transistor of an output current source;
• sourcing current into said output current source when voltage at a base of said output transistor is decreased;
• and
• sinking current from said output current source when voltage at said base of said output transistor is increased, and
• wherein external disturbances imparted onto said output current source from said bias rail supply are absorbed to provide said stable reference signal.

A method for providing a stable reference signal from a bias rail supply, said method comprising the steps of:

• receiving a bias rail supply reference into a bias rail buffer circuit;
• providing an output current reference to an output transistor of an output current source, said output transistor having a base connected to said bias rail buffer circuit, and an emitter coupled to the bias rail supply reference through a resistor;
• sourcing current into said output current source when voltage at a base of said output transistor is decreased;
• and
• sinking current from said output current source when voltage at said base of said output transistor is increased, and
• wherein external disturbances imparted onto said output current source from said bias rail supply are absorbed to provide said stable reference signal.

A method for providing a stable reference signal from a bias rail supply, said method comprising the steps of:

• receiving a bias rail supply reference into a bias rail buffer circuit;
• providing an output current reference to an output transistor of an output current source;
• sourcing current into said output current source when voltage at a base of said output transistor is decreased;
• and
• sinking current from said output current source when voltage at said base of said output transistor is increased, and
• wherein external disturbances imparted onto said output current source from said bias rail supply are absorbed to provide said stable reference signal.