Patent ID: 6320452
Filing Date: 2001-11-20
Classification: G05F

Abstract:
A low voltage floating power supply derived a high voltage source, comprising:a positive high voltage source;a negative high voltage source,an input voltage;a first npn transistor with a collector connected to said positive high voltage source;a first Zener diode with cathode connected to the emitter of said first npn transistor;a second Zener diode with cathode connected to the anode of said first Zener diode;a second npn transistor with collector connected the anode of said second Zener diode,a current source for sinking the emitter current of said second npn transistor to said negative high voltage source;a bias regulator to add a fixed bias to the input voltage for biasing the base of said first npn transistor,a positive supply voltage obtained at the emitter of said first npn transistor;a negative supply voltage obtained at the collector of said second npn transistor.