Measuring Instruments

Transistor Tester and its characteristics

Transistor Tester and its characteristics: The term Transistor Tester (or analyser) used in this text is for instruments giving quantative measurements of transistor parameters. The tester should be able to provide direct readings for at least two important measurements, such as: A value for the forward gain in the common emitter configuration (hFE for ac gain …

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LCR Bridge

LCR Bridge: Basic LCR Bridge (Skeleton Type) : A simple bridge for the measurement of resistance, capacitance and inductance may be constructed with four resistance decades in one arm, and binding post terminals to which external resistors or capacitors may be connected, to complete the other arms. Such a skeleton arrangement is useful in the …

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Q Meter

Q Meter: The overall efficiency of coils and capacitors intended for RF applications is best evaluated using the Q value. The Q Meter is used to measure some electrical properties of coils and capacitors. The Q Meter Working Principle is based on series resonance; the voltage drop across the coil or capacitor is Q times …

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What is Phase Sensitive Detector or Phase Meter Circuit?

What is Phase Sensitive Detector or Phase Meter Circuit?: Figure 10.4 shows a Phase Sensitive Detector or Phase Meter Circuit for comparing an ac, signal with a reference signal. The Phase Sensitive Detector Circuit produces a rectified output, which is fed to a dc meter, to illustrate clearly that the output of the phase sensitive …

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