| 摘要 |
PURPOSE:To simplify greatly the constitution of an entire circuit, by compensating a shift of local frequency to the desired value by resetting periodically a frequency divider. CONSTITUTION:A frequency divider 2 which divides the output f0 of an existing oscillator 1 is reset by a reset pulse PR and with a period equal to the frequency fB of heterodyne detection in order to obtain the local frequency fL obtained by the oscillator 1 which is approximate to the desired value. As a result, it is possible to have the apparent approximation between the frequency fL and the desired level of frequency. |
