| 摘要 |
PURPOSE:To adjust oscillation frequency on an average, by varying a current flowing to an oscillating circuit. CONSTITUTION:Oscillation frequency of an oscillating circuit 1 driven by a constant-current of a usual constant-curent transistor 10 is adjusted by turning on and off the second constant-current transistor 11 connected in parallel with the constant-current transistor 10. That is to say, by controlling the turn-on and off of switching elements 7, 8 by a signal outputted by a slow and quick signal generating circuit 4 in accordance with contents of a slow and quick memory 5 to which slow and quick information from the outside is inputted, the oscillation frequency of the oscillating circuit 1 driven by a constant current of the usual constant-current transistor 10 is advanced and the frequency is adjusted von an average, by turning on the second constant-current transistor 11 discontinuously and increasing a current flowing to the oscillating circuit 1. |
