| 摘要 |
PURPOSE:To obtain a prescribed frequency response characteristic at the steady- state by providing a bypass circuit conducting to a loop filter at the transient response to quicken the transient response characteristic. CONSTITUTION:A lag/lead filter 80 as a loop filter has diodes 6, 7 forming a bypass circuit connected in parallel with a resistor 3. When the width of change in a voltage inputted to the input terminal 1 of the lag/lead filter 80 is larger than the forward voltage of the diode 6 or 7 in the transient response, the input signal dose not pass through the resistor 3 but passes through the diode 6 or 7. Thus, a quick response is provided by a high natural angular frequency and a proper damping factor in the transient response and the bypass circuit goes to non-energized state at the steady-state to provide the prescribed frequency response by means of the low natural angular frequency and the prescribed damping factor.
|
