| 摘要 |
PURPOSE:To provide a synchronizing follow-up circuit which has a simple constitution and excellent follow-up characteristic. CONSTITUTION:This synchronizing follow-up circuit consists of the correlation value calculation means 1 and 3 which calculate the correlative value from the input PN signals of the transmitter and receiver sides, an adaptive control means 5 which calculates the control voltage from the correlation value calculated by both means 1 and 3 and the control coefficient of a down hill method, a voltage control oscillator means 7 whose oscillation frequency is controlled in accordance with the control voltage calculated by the means 5, and a PN code generator means 9 which generates a PN code for adverse diffusion in response to the signal of a prescribed oscillation frequency supplied from the means 7. |
