Patent ID: 6323831
Filing Date: 2001-11-27
Classification: H01J

Abstract:
A power switch device including an electron emitting element connected in series to a series circuit including a signal source, a voltage source and a load, comprising:an emitter electrode configured to emit electrons when applied with an electric field;a gate electrode configured to extract the electrons emitted from the emitter electrode, when applied with a voltage from the signal source, said voltage being positive with respect to the emitter electrode;an anode electrode connected to the load and configured to collect the electrons extracted by the gate electrode, to flow an anode current through the anode electrode; anda gate resistor connected between the signal source and the gate electrode,wherein the power switch device has V-I characteristic of the load including a linear domain in which the anode current increases in correspondence with an increase of the anode voltage and a saturation domain indicating a constant anode current, andthe gate resistor has a resistance for generating a gate voltage by which the power switch device is turned on at the linear domain.