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Andy aka
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Ideally you need to feed the tank circuit from a current source and not a voltage source. The output from your 555 is a voltage source so try feeding the tank through a 1 kohm resistor (kind of simulatesa compromise between a voltage and current source). You could even feed the tank via a small capacitor (such as 10 nF) to get voltage amplification but the Q of this circuit may be too high for what you want.

enter image description here

The inverter on the left can be your 555 output.

You could also use a transistor to connect the tank to a (the) DC supply then quickly disconnect it using the transistor. The time period that the transistor is on should be equivalent to half the time period of the resonant frequency ideally.

Ideally you need to feed the tank circuit from a current source and not a voltage source. The output from your 555 is a voltage source so try feeding the tank through a 1 kohm resistor (kind of simulates a current source). You could even feed the tank via a small capacitor (such as 10 nF) to get voltage amplification but the Q of this circuit may be too high for what you want.

You could also use a transistor to connect the tank to a (the) DC supply then quickly disconnect it using the transistor. The time period that the transistor is on should be equivalent to half the time period of the resonant frequency ideally.

Ideally you need to feed the tank circuit from a current source and not a voltage source. The output from your 555 is a voltage source so try feeding the tank through a 1 kohm resistor (a compromise between a voltage and current source). You could even feed the tank via a small capacitor (such as 10 nF) to get voltage amplification but the Q of this circuit may be too high for what you want.

enter image description here

The inverter on the left can be your 555 output.

You could also use a transistor to connect the tank to a (the) DC supply then quickly disconnect it using the transistor. The time period that the transistor is on should be equivalent to half the time period of the resonant frequency ideally.

Source Link
Andy aka
  • 366.8k
  • 22
  • 306
  • 641

Ideally you need to feed the tank circuit from a current source and not a voltage source. The output from your 555 is a voltage source so try feeding the tank through a 1 kohm resistor (kind of simulates a current source). You could even feed the tank via a small capacitor (such as 10 nF) to get voltage amplification but the Q of this circuit may be too high for what you want.

You could also use a transistor to connect the tank to a (the) DC supply then quickly disconnect it using the transistor. The time period that the transistor is on should be equivalent to half the time period of the resonant frequency ideally.