JPH01146290U

JPH01146290U -

Info

Publication number: JPH01146290U
Application number: JP4177288U
Authority: JP
Priority date: 1988-03-28
Filing date: 1988-03-28
Publication date: 1989-10-09

Description

[Brief explanation of the drawing]

第１図は本考案に係る垂直偏向回路の一実施例
を示す回路図、第２図は第１図に示す回路の動作
を説明するための波形図、第３図は本考案の他の
実施例を示す回路図、第４図は従来の垂直偏向回
路を示す回路図、第５図は第４図の動作を説明す
るための波形図である。１……コンデンサ、２……充電回路、３……ツ
エナーダイオード、４……垂直ドライブ回路及び
出力回路、５，６……放電抵抗、７……アノード
電流検出回路、１５……制御電流発生用トランジ
スタ、１７……抵抗、２２……スイツチングトラ
ンジスタ、２３……スイツチ回路。 Fig. 1 is a circuit diagram showing one embodiment of the vertical deflection circuit according to the present invention, Fig. 2 is a waveform diagram for explaining the operation of the circuit shown in Fig. 1, and Fig. 3 is another embodiment of the present invention. FIG. 4 is a circuit diagram showing an example of a conventional vertical deflection circuit, and FIG. 5 is a waveform diagram for explaining the operation of FIG. 4. 1... Capacitor, 2... Charging circuit, 3... Zener diode, 4... Vertical drive circuit and output circuit, 5, 6... Discharging resistor, 7... Anode current detection circuit, 15... Control current generation Transistor, 17...Resistor, 22...Switching transistor, 23...Switch circuit.

Claims

[Claims for Utility Model Registration] (1) A sawtooth wave voltage generation circuit including a capacitor that is charged during the vertical retrace period, discharged during the scanning period, and generates a sawtooth wave voltage by repeating this charging and discharging, and an image receiving circuit. a control means for respectively generating a control voltage and a control current proportional to the amount of anode current of the tube; and applying the control voltage to an output terminal of the sawtooth wave voltage generation circuit to set a minimum voltage value of the sawtooth wave voltage. minimum voltage setting means, inputting the control current, generating a reference voltage that changes in a direction opposite to the change in the minimum voltage based on the control current, and adjusting the maximum voltage value of the sawtooth wave voltage to this reference voltage; A vertical deflection circuit comprising a clamping means for clamping. (2) In the clamp means, the emitter is connected to a reference potential point, conduction occurs between the collector and emitter when the capacitor is charged, and conduction occurs between the collector and emitter when the capacitor is discharged.
It consists of a transistor whose emitter is turned off, a diode circuit in which a plurality of diodes are connected in series between the collector of this transistor and a reference potential point, and which is turned off when the capacitor is being charged and turned on when it is discharged; a Zener diode connected to a voltage source via a first resistor; one end connected to the collector of the transistor;
a second resistor to which the control current is introduced while the anode of the Zener diode is connected to the other end; the anode is connected to the output end of the sawtooth voltage generating circuit and the cathode is connected to the cathode of the Zener diode; 2. The vertical deflection circuit according to claim 1, further comprising a diode connected to the capacitor and turned on when charging the capacitor and turned off when discharging the capacitor.