Overvoltage protected de-boost regulator

An improved overvoltage protected electronic voltage regulator, comprising:

• a source of unregulated direct voltage including a first terminal at which said unregulated voltage appears relative to a reference point;
• a source of alternating voltage;
• capacitance means;
• controlled switch means interconnected with said source of unregulated direct voltage, said source of alternating voltage and said capacitance means for producing at a second terminal a regulated direct voltage relative to said reference point, said regulated direct voltage having a lesser magnitude relative to said reference point than that of said source of unregulated direct voltage but being subject to increase upon the occurrence of fault conditions;
• wherein the improvement comprises unidirectional current conduction means coupled between said first and second terminals and poled for conduction when said regulated voltage exceeds said unregulated voltage under fault conditions;
• and
• resistance means serially coupled with said source of alternating voltage for limiting current during conduction of said unidirectional current conduction means.

An overvoltage protected electronic voltage regulator, comprising:

• a source of unregulated direct voltage including a first terminal at which said unregulated voltage appears relative to a reference point;
• a source of alternating voltage;
• capacitance means;
• controlled rectifier means interconnected with said source of unregulated direct voltage, said source of alternating voltage and said capacitance means for producing at a second terminal a regulated direct voltage relative to said reference point, said regulated direct voltage having a lesser magnitude with respect to said reference point than that of said source of unregulated direct voltage;
• a horizontal deflection circuit coupled to said second terminal and to said reference point for energization by said regulated voltage;
• unidirectional current conduction means coupled between said first and second terminals and poled for nonconduction when said unregulated direct voltage exceeds said regulated direct voltage and for conduction in the event that said regulated voltage exceeds said unregulated voltage under fault conditions;
• and
• resistance means serially coupled with said source of alternating voltage for limiting current in said source of alternating voltage and in said horizontal deflection circuit during conduction of said unidirectional current conduction means.