Hi, i would like to convert a square wave that i made using a 555 into a sine wave. It can include ICs, diodes, resistors, transistors and capacitors but i dont want to use a filter or something else and i would like it to be low cost. If it is not easy i would like a circuit which will make a sine wave directly. It can contain the items mentioned above and has to be low cost. The frequency range is between 50Hz to 600KHz max. Thx in advance and eagerly waiting for replies.