6. RLC circuits

Note

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6.1. Basic RL circuit

For this circuit we are going to use the following components:

  • 100Ω or 470Ω resistors

  • 10mH coil

_images/lr_circuit.jpg

Fig. 6.1.1 RL circuit

The voltage and the current in the coil can be analysed over the circuit. Both their amplitudes and the out-of-phase between them may be tested on this circuit. Remember that you can measure the current at the beginning of each branch, it is here, before the resistor.

_images/rl_breadboard_funcgen_oscilloscope.png

Fig. 6.1.2 Implementation of the RL circuit. Input signal: 500Hz and 3Vpp | Download this circuit

6.2. RLC circuit

For this circuit we are going to use the following components:

  • 100Ω resistor

  • 10mH inductor and 100mH inductor

  • 2.2nF capacitor

_images/rlc_circuit.jpg

Fig. 6.2.1 RLC circuit

On this circuit it can be analysed how are voltages both in the capacitor and inductor respect to the input signal, being able to analyse both their amplitudes and the existing out-of-phase. Remember that you can measure the current at the beginning of each branch, it is here, before the resistor.

_images/rlc-circuit_breadboard_funcgen_oscilloscope.png

Fig. 6.2.2 RLC circuit implementation. Square input signal 500Hz and 2Vpp and 100 ohm resistor. 10mH. | Download this circuit

With an 100mH inductor, the result is the following:

_images/rlc-circuit-100mH_breadboard_funcgen_oscilloscope.png

Fig. 6.2.3 RLC circuit implementation. Square input signal 500Hz and 2Vpp and 100 ohm resistor. 100mH. | Download this circuit

That’s all in RCL Circuits. Continue in Operational Amplifiers.