TH19726B - Television equipment with anti-burn circuitry with amplification, cut-off time constant of the grid. - Google Patents

Abstract

The selected voltage source supplies voltage to the voltage divider and to the exit point through the capacitor. the junction of the divider Potential is connected to the exit point through the conduction line of the The transistor at the base pin is grounded. The operation of the transistor is as follows: (1) it operates in reverse for the capacitor's initial charge; (2) it operates either normal or reversed. to maintain the grid bias voltage at the exit point for current flow. Rip in the direction relative to the exit point (3) operates independently of the The displacement of the supply voltage selected by the capacitor is transmitted. Negative grid cut-off bias to the junction point where independently operated transistors prevent The grid cut-off bias at the exit point has the cut-off time constant. is amplified due to the absence of any discharge line for the capacitor other than current slippage.

Claims (6)

1. Grid bias control circuit for use with picture tubes. It consists of an entry point connected to the source of the selected and correct supply voltage. Through the capacitor generating pulses to the point of departure to generate force Push to usgrid with a positive value set at the output point for the lamp. When the voltage is applied and for generating grid cut-off pulses Negative at the exit point on the supply voltage junction for the separation of the lamp, the potential divider between the input and the source of potential Ground and has an outlet point to provide a positive grid bias voltage. When voltage is applied, there is a ground voltage on the junction of the transistor supply voltage with a conduction line between the divider exit. The potential and output points of the transistor grid bias control circuit have a control pin connected to the ground potential source. 2. The bias-grid control circuit as described in claim 1 for use with the lamp will have a positive grid bias voltage at It consists of several positive voltages relative to the ground potential and the control circuit bias. Zener diode connected between the exit point of the potential divider and Ground potential source Resistor for connecting the control pin of the transistor to the ground source. 3. Grid bias control circuit, as described in claim 2, zener diode will have a breakage voltage greater than the grid bias voltage. The nominal positive generated by the potential divider when the voltage is applied. 4. The biasing control circuit, as described in claim 3, consists of a diode connected in parallel with the transistor's conductivity. 5. Grid biasing control circuit, as described in claim 1, the transistor's control pin is connected to the ground potential source. No direct insertion of the device 6. Grid bias control circuit as described in claim 5, later assemble a diode connected between the outlet point and the ground potential source (Clause 6, 2 pages, Fig. 5).