| 摘要 |
PURPOSE:To obtain an inexpensive harmonic suppressor filter with simple constitution in which the harmonic components are eliminated in advance from a binary signal by providing a time constant circuit and an adder so as to eliminate the harmonics by the cooperation of them. CONSTITUTION:When a binary signal is applied to a signal line (a), this waveform is delayed by the time constant circuit 1 and produces a waveform on a signal line (b). A delayed binary signal is obtained by passing the signal on the signal line (b) through a waveform shaping circuit 2. The waveform on a signal line (c) is added to a signal from a buffer amplifier 4 at an adder 3 and a signal in which the 3rd hamonic is eliminated is obtained on a signal line (d) with a suitable amplification factor. High order harmonics are eliminated by passing the signal on the signal line (d) through an LPF and a sinusoidal wave by a single frequency compoent is obtained on a signal line (e). Since the 3rd harmonic is eliminated without using an expensive filter circuit in this way, the cost of applied system is decreased. |
