Patent ID: 8653863

Claim:
A sawtooth wave generation circuit comprising: a current source; an output capacitor including a first terminal and a second terminal; a switch circuit configured to switch a connection state thereof between a first connection state, in which a current from the current source is flowed from the first terminal to the second terminal of the output capacitor, and a second connection state, in which a current from the current source is flowed from the second terminal to the first terminal of the output capacitor; an output terminal configured to output an output voltage by being connected to one of the first and second terminals of the output capacitor in the first connection state and by being connected to another one of the first and second terminals of the output capacitor in the second connection state; an intermediate voltage imparting unit configured to generate an intermediate voltage of the output voltage by being connected to the other one of the first and second terminals of the output capacitor in the first connection state and by being connected to the one of the first and second terminals of the output capacitor in the second connection state; and a switch control circuit configured such that, in each connection state of the switch circuit, if the output voltage has reached a predetermined threshold which is set in relation to the intermediate voltage, the switch control circuit controls the switch circuit to switch the connection state to the other connection state at least during a part of a predetermined period thereafter.