Voltage multiplying rectifier device

Claim 2

A voltage multiplying rectifier device for supplying a high voltage to a cathode-ray tube comprising at least three semiconductor rectifiers connected in series between the output terminal of a flyback transformer and the high voltage terminal of the cathode-ray tube, a first voltage dividing capacitor connected in parallel with the two consecutive rectifiers counting from one end of the array of said series-connected rectifiers, and a second voltage dividing capacitor connected in parallel with the two consecutive rectifiers counting from the other end of the array of said series-connected rectifiers, wherein the even-numbered or second rectifier counting from the end connected to said flyback transformer has an improved reverse recovery characteristic over that of the odd-numbered or first and third rectifiers.

Claim 3

A voltage multiplying rectifier device as claimed in claim 1, in which the reverse recovery time and reverse recovery current of said second rectifier are less than those of said first and third rectifiers.

Claim 4

A voltage multiplying rectifier device as claimed in claim 1, in which said second rectifier is doped with a heavy metal in an amount larger than that for said first and third rectifiers so that it has the improved reverse recovery characteristic.

Claim 5

A voltage multiplying rectifier device as claimed in claim 1, in which the peak of the reverse recovery current of said second rectifier is lower than those of said first and third rectifiers.

Claim 6

A voltage multiplying rectifier device as claimed in claim 1, in which the peak of the forward current of said second rectifier is lower than those of said first and third rectifiers.

Claim 7

A voltage multiplying rectifier device as claimed in claim 1, in which the semiconductor element constituting said second rectifier is composed of a first layer, a second layer of a conductivity type opposite to that of said first layer, and a high-doped third layer of the same conductivity type as that of said second layer, and the thickness of said second layer is larger than those of said first and third layers.

Claim 8

A voltage multiplying rectifier device as claimed in claim 1, in which the semiconductor element constituting said second rectifier has a surface area larger than those of said first and third rectifiers.

Claim 9

A voltage multiplying rectifier device as claimed in claim 1, wherein each of said semiconductor rectifiers is a silicon rectifier.

Claim 10

A voltage multiplying rectifier device as claimed in claim 2, wherein each of said semiconductor rectifiers is a silicon rectifier.

Claim 11

A voltage multiplying rectifier device as claimed in claim 3, wherein each of said semiconductor rectifiers is a silicon rectifier.

Claim 12

A voltage multiplying rectifier device as claimed in claim 4, wherein each of said semiconductor rectifiers is a silicon rectifier.

Claim 13

A voltage multiplying rectifier device as claimed in claim 5, wherein each of said semiconductor rectifiers is a silicon rectifier.

Claim 14

A voltage multiplying rectifier device as claimed in claim 6, wherein each of said semiconductor rectifiers is a silicon rectifier and the semiconductor element constituting said second rectifier is silicon.

Claim 15

A voltage multiplying rectifier device as claimed in claim 7, wherein each of said semiconductor rectifiers is a silicon rectifier and the semiconductor element constituting said second rectifier is silicon.

Claim 16

A voltage multiplying rectifier device for supplying a high voltage to a cathode-ray tube comprising an odd number (except one) of semiconductor rectifiers connected in series between the output terminal of a flyback transformer and the high voltage terminal of the cathode-ray tube, first voltage dividing capacitors connected in parallel with the successive sets of two consecutive rectifiers counting from one end of the array of said series-connected rectifiers, and second voltage dividing capacitors connected in parallel with the successive sets of two consecutive rectifiers counting from the other end of the array of said series-connected rectifiers, wherein the even-numbered rectifiers counting from the end connected to said flyback transformer have an improved reverse recovery characteristic over that of the odd-numbered rectifiers.

Claim 17

A voltage multiplying rectifier device for supplying a high voltage to a cathode-ray tube comprising an odd number (except one) of semiconductor rectifiers connected in series between the output terminal of a flyback transformer and the high voltage terminal of the cathode-ray tube, first voltage dividing capacitors connected in parallel with the successive sets of two consecutive rectifiers counting from one end of the array of said series-connected rectifiers, and second voltage dividing capacitors connected in parallel with the successive sets of two consecutive rectifiers counting from the other end of the array of said series-connected rectifiers, wherein the even-numbered rectifiers counting from the end connected to said flyback transformer have an improved reverse recovery characteristic over that of the odd-numbered rectifiers.

Claim 18

A voltage multiplying rectifier device as claimed in claim 8, wherein each of said semiconductor rectifiers is a silicon rectifier.