Need help in oscillator design

It sounds like you are doing this the 'wrong' way.

AM transmitters don't use an expensive current feedback amplifier.

Here's how I would do it.

Build a 1MHz oscillator, it doesn't matter what type or how good the sinewave output is.

Connect it to a class C amplifier.

Modulate the power supply to the class C amplifier using an audio amplifier.

Hero999 said:

It sounds like you are doing this the 'wrong' way.

AM transmitters don't use an expensive current feedback amplifier.

Here's how I would do it.

Build a 1MHz oscillator, it doesn't matter what type or how good the sinewave output is.

Connect it to a class C amplifier.

Modulate the power supply to the class C amplifier using an audio amplifier.

Click to expand...

Thank you for your advice. But I want keep my design as simple as possible and less power consumption because I am going to make this transmitter portable.

I have eventually complete the oscillator, now it comes a problem where i cant find a suitable DC/DC inverter to power up my oscillator. My idea for this oscillator power management would be like this: battery > 12V regulator > 12V DC/DC Inverter > -12V regulator. The output of 12V regulator will be fed to the positive input of the op-amp and the input of the DC/DC Inverter. While the output of -12V regulator will be fed to the negative input of the op-amp.... Any suggestion on the DC/DC inverter that i can use???? Thank you!!!