Focusing voltage adjusting circuit and flyback transformer insta

Details Focusing voltage adjusting circuit and flyback transformer insta Focusing voltage adjusting circuit and flyback transformer insta

1995-02-22

1997-05-27

Nappi, Robert

Electricity: power supply or regulation systems

External or operator controlled

Using an impedance as the final control device

348806, 3153821, G05B 2402, H04N 322, H04N 326, G09G 104

Patent

active

056335814

ABSTRACT:
A focusing voltage adjusting circuit has a high voltage transformer, to produce and adjust a focusing voltage. The circuit includes a series circuit of a first and a second resistor, connected to a secondary coil of the transformer. Further included in the adjusting circuit is a voltage applying circuit which applies a low d.c. voltage to a terminal of the second resister. The terminal is opposite to another terminal of the second resistor connected to the first resistor. The adjusting circuit varies the d.c. voltage to adjust a focusing voltage appearing at the connection point of the first and second resistors.

REFERENCES:
patent: 4198592 (1980-04-01), Miyoshi et al.
patent: 4546291 (1985-10-01), Morioka et al.
patent: 4549216 (1985-10-01), Yuki
patent: 5331532 (1994-07-01), Iwai et al.
patent: 5446994 (1995-09-01), Akimoto et al.

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