To provide a charge pump circuit capable of quickly adjusting the balance between a discharge current and a sink one by suppressing an error in an output current caused by an offset voltage.
The charge pump circuit controls the outflow of the discharge current by opening and closing a switch 5 at a discharge side provided in the path between a current source 11 at the discharge side and charge pump output, and controls the inflow of the sink current by opening and closing a switch 6 at a sink side provided in the path between a current source 14 at a sink side and the charge pump output. In the charge pump circuit, a separate path including no charge pump output is provided between the current sources 11 and 14 at the discharge and sink sides, respectively, a pair of switches 1, 2 is provided in the middle of the path, and a current adjustment means 23 is provided which adjusts the sink current by controlling the current source 14 at the sink side according to voltage between the switches 1, 2.
Yoshihiro Morimoto
Toshiji Sasahara
Yohei Harada
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