Amfutar da Volt Elektroniki

Ma'ana da Harkar Amfaniyar Electronic Voltmeter

Ma'ana: Amfaniyar electronic voltmeter shine wata na'ambari na amfaniyar voltmeter wanda yake amfani da amplifier don zama mai kyau. Yana cikin kayan aiki mai tsawo da ke amfani a hukumomi voltages a wurare da current na yanayi (AC) da kuma current na farko (DC). Saboda ingantaccen input resistance, amfaniyar electronic voltmeter ya iya bayyana amsa voltage mai kyau, wanda yake tana ba suka fi shahara a matsayin zabe ta aiki a wasu ayyuka electrical da kuma electronics.

Amfaniyar moving - coil voltmeters na gaba suna da abin da suke sauka a kan mafi girma a kan signals daga low - voltage. Amfaniyar electronic voltmeter ya jawo wannan abin daidai. Ingantaccensu a input impedance ya iya sakamakon a kan signals daga weak electrical mai kyau, saboda haka ya tabbatar da amsar da za a yi mai kyau. High impedance na nufin cewa amfaniyar voltmeter yana nuna opposition mai kyau ga input supply, wanda yake tana haɗa da loading effect a kan circuit da ke hukumomi.

Amfaniyar electronic voltmeters suna iya amfani da transistors ko vacuum tubes a matsayin components da suke amfani. Transistor - type voltmeters (TVMs) suna da high resistance characteristics, wanda yana ba su karin samun a hukumomi current na farko. Amma, vacuum - tube voltmeters (VVMs) suna da resistance mai kadan, wanda yana ba su karin samun a wasu ayyukan current - measurement tasks a matsayin hukumomin voltage.

Harkar Amfaniyar Electronic Voltmeter

Harkokin amfaniyar electronic voltmeter ana ƙunshi hukumomin cewa magnitude of the measured voltage shine directly proportional to the deflection of the pointer on the instrument. Pointer yana cikin scale mai tsawo, da position da yake ita ita ya nuna magnitude of the input voltage.

A halin amfaniyar moving - coil voltmeters, wadannan suna ci gaba da power mai kyau daga circuit da ke hukumomi, wanda yana iya haɗa da errors a kan readings saboda circuit loading, amfaniyar electronic voltmeters suna jawo wannan abin daidai. Ingantaccensa a input impedance ya iya haɗa da power extraction mai kyau daga circuit da ke hukumomi, saboda haka ya iya bayyana amsa da zabi a kan voltage measurements across a wide range of applications.

Electronic Voltmeter: Operation and Classification

A amfaniyar electronic voltmeter, deflection of the pointer an yi amfani da auxiliary amplifier circuit. Output voltages of this amplifier closely mirror the voltage levels of the test circuit. Minimally additional power passes through the deflector mechanism. This design feature ensures that the meter can provide highly accurate readings, as it reduces the potential for errors caused by power - related interference or loading effects on the circuit being measured.

Types of Electronic Voltmeter

Amfaniyar electronic voltmeters suna iya haɗa da two distinct types:

Analog Electronic Voltmeter

An analog electronic voltmeter is characterized by its output being indicated through the deflection of a pointer on a calibrated scale. This type of voltage - measuring instrument boasts high circuit impedance, which minimizes its impact on the circuit under test. It employs an electronic amplifier to regulate and process the input signals effectively.

The analog electronic voltmeter can be further subdivided based on the type of voltage it measures:

• AC Analog Electronic Voltmeter: Specifically designed to measure alternating current voltages, it accurately captures the fluctuating nature of AC signals and translates them into a corresponding pointer deflection on the scale.

• DC Analog Electronic Voltmeter: Tailored for the measurement of direct current voltages, it provides a stable and reliable indication of constant - voltage levels, making it suitable for a wide range of DC - powered electrical systems and components.

Digital Electronic Voltmeter and Advantages of Electronic Voltmeters

Digital Electronic Voltmeter

A digital electronic voltmeter is a type of instrument that provides a digital output for the measured voltage, presenting the result in a numerical format. By eliminating the need for manual interpretation of a pointer on a scale, digital electronic instruments effectively reduce human - induced errors, particularly parallax errors. Since the readings are directly displayed as numbers, they offer greater precision and clarity, ensuring more accurate and consistent voltage measurements.

Advantages of Electronic Voltmeter

Electronic voltmeters offer several significant benefits that make them indispensable tools in electrical and electronic measurement:

• Low - Level Signal Detection: Equipped with amplifiers, electronic voltmeters are designed to minimize load errors, enabling them to detect extremely weak electrical signals. These amplifiers are sensitive enough to identify signals that produce a current as low as approximately 50μA. The ability to detect such low - level signals is crucial for obtaining accurate and reliable measurements, especially in applications where the true value of a voltage might be obscured by noise or other interference. This sensitivity ensures that even the smallest voltage fluctuations can be accurately measured, providing valuable insights into the behavior of electrical circuits.

• Low Power Consumption: Electronic voltmeters incorporate vacuum tubes or transistors, both of which possess amplifying properties. Instead of relying solely on the measured voltage for operation, they utilize an auxiliary power source to drive the pointer deflection mechanism. The magnitude of the measured voltage controls the deflection of the sensing element, reducing the power drawn from the circuit under test. As a result, the overall power consumption of the electronic voltmeter circuit remains extremely low. This energy - efficient design not only extends the lifespan of the instrument but also minimizes its impact on the circuit being measured, making it suitable for a wide range of applications, including those where power conservation is critical.

• Broad Frequency Range: Thanks to the use of transistors, the operation of electronic voltmeters is not limited by a specific frequency range. These versatile instruments can accurately measure voltages across a wide spectrum, from very low frequencies to extremely high frequencies. This wide - ranging frequency capability allows electronic voltmeters to be used in diverse applications, such as in the analysis of power systems, signal processing circuits, and high - speed digital electronics. Whether measuring the slow - varying DC components or the rapidly oscillating AC signals, electronic voltmeters can provide reliable and precise voltage readings, making them an essential tool for engineers and technicians working in various fields of electronics.

It is important to note that electronic voltmeters can only measure power when the circuit is closed and current is flowing through the meter. This operational requirement highlights the need for proper circuit configuration and connectivity to obtain accurate power measurements using these instruments.