#CATHODE RAY EXPERIMENT DIAGRAM GENERATOR#
So the trigger saw tooth generator gives the input to the horizontal amplifier by following the mechanism. By seeing the circuit diagram the sawtooth sweep generator is triggered by the synchronizing amplifier while the sweep selector switches in the internal position. The horizontal deflection plates are penetrated by a sweep voltage that gives a time base. The vertical and horizontal system consists of horizontal amplifiers to amplify the weak input signals, but it is different from the vertical deflection system. To examine the input signals are penetrated to the vertical deflection plates through the input attenuator and the number of amplifier stages. The main function of this amplifier is to amplify the weak signal so that the amplified signal can produce the desired signal. Working of CRO Vertical Deflection System In this, we will discuss important parts of the oscilloscope. The following circuit diagram shows the basic circuit of a cathode ray oscilloscope. The surface of the coating is connected electrically toward the accelerating anode to help the electron to be the center. This is a conducting material that acts like a high-voltage electrode. The inside faces of the CRT among the neck as well as the display are covered through the aquadag. It is an extremely evacuated conical form of construction. Once an electronics ray hits phosphor crystal, the energy level can be enhanced & thus light is generated throughout phosphorous crystallization, so this occurrence is known as fluorescence. The inner face of the faceplate is covered by using phosphor crystal to change the energy from electrical to light. The CRT screen is somewhat bent for bigger displays and the formation of faceplate can be done by pressing the molten glass into a form & after that heating it. In the CRT, the front face is known as the faceplate, For the CRT screen, it is flat and its size is about 100mm×100mm.
The set of the plate is used for a horizontal deflection which is known as X plate’s otherwise horizontal deflection. This set will generate the vertical deflection that is known as Y plate’s otherwise vertical deflecting plate. Once the electron ray leaves the electron gun then this ray will pass throughout the two sets of the deflecting plate. Here, a cathode ray oscilloscope utilizes an electrostatic focusing tube.
The electron ray can be focused on using two techniques like Electrostatic & Electromagnetic focusing. The anodes like accelerating & pre-accelerating are connected to 1500v & the focusing electrode can be connected to 500v. The electron ray is concentrated on electrodes to flow throughout the deflection plates like horizontal and vertical & supplies on to the fluorescent lamp. When electrons flow throughout the control grid then it accelerates with the help of a high positive potential which is applied to the pre-accelerating or accelerating nodes. So, it controls the strength of the generated electrons from the cathode. Once the electrons are generated from the cathode grid, then it flows throughout the control grid that is generally a nickel cylinder through a centrally situated co-axial by the axis of CRT. At the cathode end, the strontium & barium layers are deposited to obtain the high electrons emission of electrons at the moderate temperature, the layers of barium, and are deposited at the end of the cathode. This gun mainly includes a heater, a grid, cathode, and anodes like accelerating, pre-accelerating & focusing.
The main function of the electron gun is to emit the electrons to form them into a ray. Thus, it can amplify the signal to a level that will be provided the deflection of the electron beam. The signals are passed from the vertical deflection plate through the vertical amplifier. Just before detecting the electron beam on the screen in the horizontal direction which is in X-axis a constant time-dependent rate, a time base generator is given by the oscillator. The horizontal and vertical plates are placed between the electron gun and the screen, thus it can detect the beam according to the input signal. The normal voltage supply is necessary for other control units of the oscilloscope. A high voltage is required for the cathode ray tube to speed up the beam. The low voltage is used for the heater of the electron gun to generate the electron beam. Here we will use high voltage and low voltage. This provides the power supply circuit of the oscilloscope. To complete this task we need various electrical signals and voltages. By detecting the beam above the screen in reply to the electrical signal, the electrons can act as an electrical pencil of light which produces a light where it strikes. Thus, the screen produces a visible spot where the electron beam strikes with it.
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