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voltage, current, resistance etc.) are known as electronic instruments. 22.1 Electronic Instruments. 22.3 Applications of Multimeter. 22.5 Merits and Demerits of Multimeter. 22.7 Electronic Voltmeters. 22.9 Applications of VTVM. 22.11 Transistor Voltmeter Circuit. 22.13 Cathode Ray Oscilloscope. 22.15 Deflection Sensitivity of
Transistor. Characteristics Lab. Introduction. Transistors are the active component in various devices like amplifiers and oscillators. They are called active devices since transistors are capable of amplifying (or making larger) . NOTE: is called hfe on the digital multimeter when you measure the transistor characteristic. The.
Transistor Voltmeter - Direct coupled amplifiers are economical and hence used widely in general purpose low priced VTVM' s. Figure 4.9 Transistor Voltmeter.
Transistor Voltmeter: Emitter Follower. Emitter follower increase input resistance reduce output resistance. V in. +. -. V in. V. BE. I. B. V in. R i =I. B. R s. R m. +. -. V. CC. I. E. = I m. Basic concept. Voltage to be measured. PMMC. Voltage drop across meter: m in. BE. V V V. = ?. Meter current: in. BE m s m. V V. I. R R. ?. = +.
Analog Electronic. Volt-Ohm-Milliammeters. 4. Objectives. You wiU be able to: l. Sketch various transistor analog voltmeter circuits, and explain the operation of each circuit. Calculate circuit currents, voltages, and input resistance. 2. Sketch an input aUenuator circuit as used with an electronic voltmeter. Explain its op eration
DIGITAL VOLTMETER. OBJECTIVE. To combine analog and digital circuits to perform digital measurements of voltages in the. 0 to 5 volt dc range. PROCEDURE. 1) Use a potentiometer in Fig. 1 to obtain a dc voltage that can be varied from 0 to 5 volts. There are many ways in which this voltage may be measured digitally.
plotting of Nyquist, Bode or Nichols diagrams. It generates sine waves and modulated carrier wave-forms, and covers the frequency ranges 0.1-2.0 c/s and 1'0-20 cjs. It gives a direct reading of both amplitude and frequency, and a direct read-out of the phase lag. The frequency accuracy is 2 5 "/, of the setting. The size of the
phase, Amplitude and rise time of a pulse. Digital Multi-meter: Block diagram, principle of operation, Accuracy of measurement, Electronic. Voltmeter: Transistor Voltmeter, Block diagram, principle of operation, various types of electronic voltmeter, Digital Frequency meter: Block diagram, principle of operation. TEXT BOOKS.
13 Aug 2017 This type of voltmeter is very common because of its low cost. This instrument can be used only to measure voltages of the order of milli-volts owing to limited amplifier gain. The circuit diagram for a direct coupled amplifier dc voltmeter using cascaded transistors is shown in figure. An attenuator is used in
TYPE 1806-A ELECTRONIC VOLTMETER. The first tube is connected as a simple cathode follower and is operated at reduced plate current and reduced heater voltage, to mini- mize grid current. The transistor and the second tube comprise a cir- cuit which possesses a number of desirable characteristics. First, the.
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