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Cathode Ray Tube, , A CRT is a vacuum tube that acts as the, main part through which the, , functionalities of a CRO is carried out., , Vertical, Deflection Aquadag, Electron Gun Plate Coating, , Heater ‘ Pre-Accelerating, , Pins oll, , ww, , , , , , , , , , , , Base, , Cathode Grid Focusing Accelerating torizontal, , Anode Anode Deflection Phosphorous, Plate Screen, , Cathode Ray Tube (Image credit: www.circuitglobe.com), , It consists of several parts:, , e Heater - This part is responsible for heating, the cathode., e Cathode - On being sufficiently heated,, , electrons are emitted from the cathode. In, , order to achieve this, a layer of bari ide, is coated on one end of the cathod
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° Cathode - On being sufficiently heated,, , electrons are emitted from the cathode. In, order to achieve this, a layer of barium oxide, is coated on one end of the cathode., , e Grid - It is kept at a negative potential and, helps control the intensity of the electron, beam moving towards the anode. The entire, structure is made from nickel., , e Pre-accelerating anode - Provides, acceleration to the anode before entering the, Focusing Anode., , e Focusing Anode - It helps align the incoming, electron beam., , e Accelerating anode - Its job is to again, accelerate the newly aligned electron beam., Note here that both pre-accelerating and, accelerating anodes are connected toa, , common positive potential of 1500 volts.
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Cathode Ray Oscilloscope, (CRO), , Now that we have learnt the basics of how, a CRT works, let’s move onto learning, about a CRO., , As mentioned, a CRO is a device that is, used for measuring and displaying, , different forms of electrical signals., , , , Vertical Horizontal, Deflection Deflection, , , , , , , , , , , , , , , , , , , , , , ———, Vertical Delay Plates Plates, Amplifier Line Screen, >, | Electron, Gun ™, , , , Input a, , Signal Fai lantfiasqeda aon, , CRT, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Power, Supply, Trigger Time Base Horizontal, L_»! i—>! ——>, Circuit Generetor Amplifier 1, , , , , , , , , , , , , , , , , , ‘her, its, CRO System (Image credit: www.tutorialspoint.com)
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It consists of:, , e Cathode Ray Tube - Through this, mechanism, electrons are emitted and, controlled to form the desired signal image, on the fluorescent screen., , e Vertical Amplifier - It amplifies the input, signal for display on the CRT screen., , e Delay Line - It provides a certain signal delay, that is applied to vertical deflection plates of, CRT., , e Trigger Circuit — It produces a triggering, signal for synchronizing both horizontal and, vertical deflections of the electron beam., , e Time base Generator - It produces a, sawtooth signal for horizontal deflection of, the electron beam., , e Horizontal Amplifier — It amplifies the, sawtooth signal and then connects it to the, horizontal deflection plates of CRT., , e Power supply - It produces both high and, low voltages. The negative high voltage and, positive low voltage are applied to, , other circuits respectively.
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Through this procedure, a CRO displays, the applied input signal on the screen of, , CRT, providing signals in the time domain., , Applications:, , e While numerous, a CRO can be used for the, following purposes:, , e To determine the amplitude of a waveform., , e Comparison between the phases and, frequencies of electrical signals., , e Help measure capacitance and inductance, values., , e In the medical field and medical trials, it can, be used for monitoring various body, parameters like heartbeat rates and ous, , reactions.
