Patent ID: 7160426

Claim:
A water treatment apparatus for treating a water flowing in a water pipe, the apparatus comprising: an inductive coil, which is sleeved onto said water pipe; and a voltage signal unit, which is electrically connected to said inductive coil for sending a voltage signal of a predetermined frequency to said inductive coil, wherein said voltage signal unit comprises: a variable voltage generator, which is adapted to generate a voltage signal; a voltage/frequency converter, which is electrically coupled to said variable voltage generator for receiving said voltage signal and converting said voltage signal into a frequency signal; a high frequency oscillator for outputting a high frequency signal; a carrier modulator, which is electrically connected with said voltage/frequency converter and said high frequency oscillator for modulating said frequency signal and said high frequency signal into a mixing signal; and a dual path driving circuit coupled to the carrier modulator for amplifying said mixing signal and for directing said amplified mixing signal into two ends of said inductive coil so as to generate an electromagnetic field for treating said water.