Date Added: Jan 2010
Sinusoidal frequency doublers are popular in telecommunication for example using instrument processing, or circuit analysis in analog processing. The normally, sinusoidal frequency doublers has be the characteristic of tune LC circuit or analog multiplier circuit. A lot of researches presented has the narrow frequency operation period and non suitable for establish of integrated circuit, so the circuit development by multiplier circuit and sinusoidal frequency doublers used op-amp to function, then it able to charge the limited of tune LC circuit, and able to establish integrated circuit too. However, the circuits still have op-amp then the circuits still have big size, high loss of power supply, and used a lot of device.