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I am trying to increase the amplitude of my generated electrical signal by a passive amplifier. I have seen so many complex RLC circuits. But I have limited space for design, therefore, can I use a simple lumped RLC model as an amplifier? Is there any other passive component that can be used for amplification?

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    \$\begingroup\$ Please describe your "generated electrical signal"...voltage, current, frequency, etc. \$\endgroup\$ – Elliot Alderson Feb 6 at 21:12
  • \$\begingroup\$ A harmonic oscillator would work but only for certain frequency/-ies. I'm afraid what others have said is true, no such thing. (edit) Oscillator is a bad chosen word which would imply active amplification, I meant an undamped passive filter. \$\endgroup\$ – a concerned citizen Feb 6 at 21:22
  • \$\begingroup\$ Which are you trying to amplify?...voltage or current? If your source signal has a lower impedance than your load impedance, voltage amplification is possible for AC signals, using a LC network. \$\endgroup\$ – glen_geek Feb 6 at 21:44
  • \$\begingroup\$ A transformer is the only solution that comes to mind with a limited BW of 2 to 3 decades \$\endgroup\$ – Tony Stewart Sunnyskyguy EE75 Feb 7 at 3:42
  • \$\begingroup\$ I need to amplify the voltage of the generated electrical signal. I used LC network for generating an electrical signal but the amplitude is not sufficient for my system. Therefore, I am looking for any suggestions on how to amplify it. \$\endgroup\$ – Nazneen Feb 8 at 2:37
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A "passive amplifier" is an oxymoron. No, you can't make an amplifier from R, L, C or other passive components.

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    \$\begingroup\$ Well, if you only need AC voltage amplification (not power amplification) there's a transformer. Not practical for all purposes, but it is kind of a passive amplifier. \$\endgroup\$ – John D Feb 6 at 21:04
  • \$\begingroup\$ @JohnD Fair enough, if the signal is AC then a transformer might do the trick. \$\endgroup\$ – Elliot Alderson Feb 6 at 21:13
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    \$\begingroup\$ You can make a frequency specific voltage amplifier with an LC circuit. Just saying! \$\endgroup\$ – Andy aka Feb 6 at 22:44
  • \$\begingroup\$ Andy aka.. would you please tell me what type of voltage amplifier you are talking about? \$\endgroup\$ – Nazneen Feb 8 at 2:39
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A C + L + C resonator, for a narrow-band sin, called a "PI" filter, may work for you.

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  • \$\begingroup\$ Thank you for your comment. But I don't any filter. I need an amplifier. \$\endgroup\$ – Nazneen Feb 8 at 2:41

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