| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To quickly generate a saw-tooth wave voltage having a stabilized amplitude. <P>SOLUTION: The saw-tooth generation circuit is provided with voltage sources 1, 8 for determining the reference voltage, a comparison circuit 2 for comparing the reference voltage V<SB>H</SB>of the voltage source 1 with the output voltage V<SB>OUT</SB>of a saw-tooth wave, two capacitors C1, C2 for alternately repeating charging/discharging in accordance with the compared result of the comparison circuit 2, a constant current circuit 7 for charging the capacitors C1, C2 with a current of a size for determining the oscillation frequency of the saw-tooth wave, switch circuits 3, 6 for forming respective discharge circuits of the capacitors C1, C2, and switch circuits 4, 5 for respectively connecting the capacitors C1, C2 to the constant current circuit 7 so as to alternately charge the capacitors C1, C2. Thus saw-tooth wave having a prescribed amplitude corresponding to the reference voltage V<SB>H</SB>and V<SB>L</SB>can be generated from an output terminal 9. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
