| 摘要 |
The output signals from the filters (2,3) are sensed by two detectors (4,5), and then passed to two comparators (6,7). As a reference for the comparators, the oscillator signal is used via a sensor (8). The comparators control a bistable multi-vibrator (9) of the set and reset type, which via an emitter synchroniser (10) charges or discharges a capacitor (11) by two resistances (12,13). The output signal from the capacitor is used as a control voltage for the oscillator. The control voltage decreases and the oscillator frequency likewise by one resistance (13) being much larger than the other (12), the control voltage from the capacitor to the oscillator is of sawtooth form, and the oscillator delivers a comb spectrum. |
