Patent ID: 8030976

Claim:
A triangle wave generating circuit comprising: a pulse generating circuit configured to generate a plurality of pulse signals with the same period and with phases different from one another; and a plurality of charge/discharge circuits configured to be supplied respectively with the plurality of pulse signals, the plurality of charge/discharge circuits each including: a current supply circuit configured to supply to a capacitor a first current for charging at a predetermined current value or a second current for discharging at a predetermined current value; and a charge/discharge control circuit configured to switch between the first current and the second current when the pulse signals are supplied thereto and when a voltage across the capacitor reaches a predetermined reference voltage, the first current and the second current supplied from the current supply circuit to the capacitor, each charge/discharge circuit outputting the voltage across the capacitor as a triangle wave signal; the plurality of charge/discharge circuits outputting a respective plurality of triangle wave signals having the same period and with phases different from one another.