| 摘要 |
PURPOSE:To attain the automatic frequency control with high accuracy and speed, by integrating an input signal level for output every time when a sampling pulse is applied in a circuit automatically tracking the frequency of a voltage controlled oscillator. CONSTITUTION:Two sampling hold circuits H1, H2 are connected in feedback connection with each other, and an astatic control is performed by integrating the sampling output of the input signal level, every time when sampling pulses (smp)1, (smp)2 are applied to the circuits H1, H2. The static control is performed when the circuit H1 is in sampling state. The voltage controlled oscillator is controlled with an output signal of the circuit H1, allowing the oscillation output to follow the transmission wave with good accuracy in high speed automatically. |
