| 摘要 |
PURPOSE:To make tracking speed high without losing the control accuracy and stability, by providing the means to produce the overflow output when the output signal exceeds a prescribed range. CONSTITUTION:When an input signal x(t) is fed, the level of the output P is increased since the gain of an amplifier 16 is set at first at maximum value, and when it exceeds a prescribed limit level, the logic 1 is output to a down counter 17 as an overflow output from an overflow output circuit 26. Thus, 1 is count down by the next clock signal at the down counter 17, the gain of the amplifier 16 is lowered by one stage, Similarly, the level of the amplified output signal P is converged in the range of +Th and -Th. |
