SU1764183A1 - Device for transmitting television tube current stabilizing - Google Patents

Abstract

SUMMARY OF THE INVENTION — The device comprises 1 transmitting television (TV) tube (1), 1 quencher (2), 1 inverter anode-voltage converter (3), 1 voltage multiplier, 1 anode of transmitting TV tube (5) , 1 cathode of the transmitting TV tube (6), 1 control electrode of the transmitting TV tube (7). 2-6-5-3-4-7.1 Il.

Description

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The invention relates to television and may be used in the development of television cameras.

A device is known for controlling the current of a transmission beam of a television tube, which contains a current-voltage converter connected to the cathode circuit of a television tube, a beam current control unit and a reference element (US Pat. Nt 3708617, cl. H 04 N 5/34). The disadvantage of this device is that a power source is needed to control the voltage on the modulator.

Another beam current control device is known, which contains a DC amplifier, the output of which through a filter is connected to a control electrode of a transmitting television tube, a current-voltage converter connected to the cathode circuit of a transmitting tube (US Pat. No. 2949561, cl. 315 /12). The disadvantage of this device is that a power source is required to control the voltage on the modulator.

The closest technical solution to the proposed prototype is a beam current stabilization device containing a current-voltage converter, a DC amplifier, a filter, connected in series between the tube anode and the control electrode, and a quencher signal generator connected to it. the cathode (US Pat. No. 3831056, cl. 315/30).

This device implements the method of stabilizing the beam current (cathode) by the magnitude of the anode current, which the device stabilizes. The anode current, the passage through the current-voltage converter and the input impedance of the amplifier, form a signal that is compared with the reference one. The difference signal is amplified by an amplifier, and the introduction of a Zener diode is a forced measure, due to the need to use a very high voltage amplifier (about 500-800 V) to power the amplifier. From the output of the amplifier, the signal enters the filter, where the constant component used to control the tube mode over the cathode current and, accordingly, the anode current is extracted. The quenching driver in this circuit closes the tube in accordance with the frequency of the synchromix supplied to it, and the cathode and anode current is interrupted. The presence of an amplifier leads to the appearance of a power source, and the introduction of a Zener diode necessitates the provision of a minimum stabilization current for the Zener diode, which determines the significant power consumed by the circuit, which is a disadvantage of the device.

The purpose of the invention is to reduce power consumption.

This goal is achieved by the fact that the anode-voltage converter connected to the anode of the transmitting TV tube is inserted into the device for stabilizing the beam current of the transmitting television (TV) tube, which contains the blanking signal generator whose output is connected to the cathode of the transmitting TV tube. voltage, the first input of which is connected to the anode of the transmitting TV tube, the second input to the common bus of the device, the output to the control electrode of the transmitting TV tube.

The drawing shows a diagram of the device to stabilize the current beam of the TV tube.

The beam current stabilization device contains a television transmitting tube 1 and a shaper 2 connected to its cathode, a transducer 3 an anode-voltage connected to an anode of a TV tube 1. In addition, the device contains a multiplier 4, the first input of which is connected to the anode of a transmitting TV tubes, the second to the common bus of the device, and the output to the control electrode of the TV tube.

The device works as follows. The signal from the converter 3 is the current of the anode voltage, which reflects the change in the current of the cathode and the anode of the TV tube 1 and in time and under the influence of the blanking signal generator 2, is fed to the first input of the multiplier 4, which performs double-wave detection with doubling of the input signals and allows on the control electrode a constant voltage corresponding to the required cathode current.

Claims (1)

The stabilizing properties of the device are determined by the fact that, for example, when the current of the cathode decreases, there is an interdependent decrease in the current of the diode, the voltage on the transducer 3, the anode-voltage, the voltage on the control electrode. Taking into account that the voltage at the control electrode has a negative polarity, the potential on it will become higher, which will cause an appropriate compensating change in the current of the cathode. As an anode-to-current converter, a trimming resistor connected between the anode and the power source can be used, to the engine of which a torque sensor connected to the potential-free bus is connected. In this case, it becomes possible to set the required cathode current by adjusting the variable component of the voltage at the anode. Claims The device for stabilizing the current of a transmitting television (TV) tube tube containing a blanking signal generator, the output of which is connected to the cathode of a transmitting TV tube, transducer of the anode-voltage connected to the anode of the transmitting TV tube, characterized in that in order to reduce power consumption A power multiplier was introduced, the first input of which is connected to the anode of the transmitting TV tube, the second input to the common bus of the device, and the output to the control electrode of the transmitting TV tube. ten Editor O. Stenina. Tehred M. Morgenthal Order 3464 Circulation Subscription VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab. Production and Publishing Combine Patent, Uzhgorod, Gagarin st., 101 Proofreader M. Petrov