SU1518919A1 - Frame-scanning output device - Google Patents

Abstract

The invention relates to television. The purpose of the invention is to reduce power consumption. The device comprises a power amplifier 1, a coupling capacitor 2, personnel deflection coils (CQC) 3, a reverse capacitor 4, switches 5 and 6, and a power supply 7. During the electron beam return stroke, the switch 6 is closed and connects the source 7 to the capacitor 4, ensuring that the diverting current reaches its maximum value by the end of the half-period of the oscillations. In this case, despite the losses in the elements of the device, the duration of the electron beam return will be determined only by the parameters of the oscillating circuit formed by the COC 3 and the capacitor 4. This reduces the power supply voltage of the power amplifier 1 to a value that provides only the maximum deflection value current in the COC 3. The goal is achieved by the introduction of key 6 and source 7. 1 Il.

Description

one

(21) 4283579 / 24-09

(22) 04/21/87

(46) 10/30/89. Bul (40 (72) V.G. Levin

(53) 621.397 (088.8)

(56) Patent of the GDR No. 205798, cl. H 04 N 3/16, 1981.

(54) OUTPUT DEVICE PERSONNEL SCAN

(57) The invention relates to television. The purpose of the invention is to reduce power consumption. The device contains power amplifier 1, a coupling capacitor 2, personnel deflection of a coil (COC) 3, a reverse capacitor 4, keys 5 and 6

and power supply 7. During the electron beam return, the switch 6 closes and connects the source 7 to the capacitor 4, ensuring that the deflection current reaches its maximum value at the end of the half period of oscillation. In this case, despite the losses in the zl-max devices, the duration of the electron beam return will be determined only by the parameters of the oscillating circuit formed by the COC 3 and the capacitor 4. This reduces the power supply voltage of the power amplifier 1 to a value that provides only the maximum value of the deflecting current in the COC 3. The goal is achieved by the introduction of key 6 and source 7. 1 sludge.

The invention is referred to rejieHHAf-NIN) and can be used in devices for vertical scanning of television receivers.

The purpose of the invention is to reduce power consumption.

The drawing shows an electrical block diagram of the frame scanner output device.

The frame scanner output device contains a power amplifier 1, the first output of which is connected through a series-connected coupling capacitor 2, frame deflection coils 3 and a reverse-pass capacitor A connected to the second output of power amplifier 1. In addition, the device contains the first switch 5 connected in parallel to the reverse-pass capacitor 4 and the second switch 6 connected in series and the power supply source 7 connected in parallel to the first switch 5. The input of the power amplifier 1 is the input voltage of C) of different voltage.

Output device frame scan works as follows.

A sawtooth voltage, supplied to the power amplifier 1 from a third frame sweep generator (not shown), is amplified and in the form of a sawtooth current through separation capacitor 2 is fed into personnel deflection coils 3. At that, during On the electron beam, the first key 5 is closed, and the second key 6 is open. At the beginning of the return stroke of the electron beam, the first key 5 opens and an oscillating circuit is formed, which is mainly the inductance of personnel deflection of 1x coils 3 and the capacitance of the return capacitor 4. During the first quarter of the oscillations due to the energy stored in the staff deflecting coils 3 during the forward course of the electron beam,

d

5 0 5

0

five

.Q 45

 condenser 4 reverse. During the second quarter of the oscillations, the direction of the current n personnel deviations — the coils 3 is reversed and the reverse capacitor 4 returns the stored energy to the personnel deflecting coils 3. At this time, the second switch 6 closes and connects the source / power to the reverse capacitor 4, providing the deflection current reaches its maximum value by the end of the half cycle of oscillations. In this case, despite the losses in the elements of the device, the duration of the electron beam return is determined only by the parameters of the oscillating circuit personnel deflecting coils 3 and capacitor 4, which reduces the supply voltage of power amplifier 1 to a value that provides only the maximum value of the deflecting current in personnel deflection coils 3.

Claims (1)

Invention Formula Frame scanner output device containing a power amplifier, whose input is a sawtooth voltage input, frame deflection coils, first key, flyback capacitor and separation capacitor, characterized in that, in order to reduce power consumption, a second key is inserted and a power source, wherein the first output of the power amplifier is connected through a series-connected separation capacitor, the personnel deflection coils and the second switch is connected to the first output of the power source, the waters of which are connected to the second output of the power amplifier and through a parallel-connected return capacitor and the first switch is connected to the connection point of the frame deflecting coils and the second switch.