| 摘要 |
PURPOSE:To realize a variable frequency oscillator or the like incorporating a constant output and a rapid response by winding control current windings through small opening of the porous magnetic core made of amorphous magentic metal thin plate and exciting and output windings on a ring-shaped core. CONSTITUTION:Control current windings NC1, NC2 wound through the small opening 3 of a ring-shaped core 2 are connected in series with one another and are also connected to a DC power source EC so that the oscillating AC signals from an oscillator circuit are cancelled one another and are not thus outputted. Since samll amount of oscillation signal thus occurs in the control circuit so that only direct current IC flows thorugh the windings NC1, NC2, its circuit resistance becomes small amount, and the control signal current will become completely unidirectional from the control circuit to the side of the oscillator circuit. Inasmuch as the inductance of the control winding is small due to rotary magnetization, the control of the inductance can be rapidly conducted. The windings N1, N2 wound around the large hole 1 of the core 2 are for exciting and the winding H3 is for output. Since a rotary magnetization is thus produced, the windings themselves function as an inductance element for a variable core or the like and yet can be applied for a variable frequency oscillator having a constant output and a rapid response. |
