Q Meter Circuit
The Q meter works on the principle of resonant. When the reactance ,inductance and capacitance of the circuit are of same value or magnitude, this condition of circuit is said to resonant.
It also based on the behavior of these electrical components capacitor, inductor and resistor of the resonant circuit. In above diagram we can see that capacitance(C), inductance(L) and reactance(R) all connected in the series and make LCR series circuit.
Q Meter Circuit
The capacitor and tunable oscillator are set with correct frequency for obtaining the peak value of E0.
Now, the value of quality factor is given as:
Q max = ω0L/R
By using voltmeter we calculate the quality factor and voltmeter is connected to the capacitor. This is the value of Q for whole circuit.
Similarly by using the circuit of Q meter we measured the value of inductance, effective resistance, capacitance and self capacitance.
For inductance (L) = 1/4π2ƒ02 C
For resistance (R) = ω0 L/Q max
Q Meter
It is an electronic device used in communication like telecommunication in hardware and electronics to determine or calculate the value of the quality factor of the electrical system. It is also used in electric capacitors to measure the value of capacitance and in inductors to calculate the value of inductance. It works and runs on the principle of resonance. When the circuit is in the condition of resonance, the circuit’s impedance becomes resistive. It also measures or calculates the reactance of many unknown circuits by using the known reactance. It is also known as the Quality Factor Meter.
Table of Content
- What is Q Meter?
- Formula for Q Meter
- Components
- Q Meter Circuit
- Working Principle
- Applications of Q Meter