| 摘要 |
<p>PURPOSE:To obtain an accurate signal wave representing a ratio of a period to another period till the inversion of a signal within the former period by providing a charge/discharge constant current generating means and a control means. CONSTITUTION:The charge/discharge constant current generating means charg ing a capacitor 1 at a constant current and discharging the capacitor at a constant current and a control means controlling the charging and discharging for the charge/discharge current generating means, are provided. Resistors R2, R3, transistors (TRs) Q3, Q7, Q19 and Q20 correspond to the charge/ discharge generating means, and a resistor R1, TRs Q1, Q2, Q9-Q12, Ql4, Q15 (comparator), resistors R5, R16 (base potential setting circuit section), resistors R4, R7-R10, TRs Q4-Q8, Q16-Q18, Q21, Q22 (switching circuit section) corre spond to the control means. Thus, the ratio of a leading period to one period of a triangular wave or the duty ratio of a square wave generated by charge/ discharge is changed.</p> |
