| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bias circuit that can prevent a current variation of a current source due to a process, temperature and/or supply voltage variation. <P>SOLUTION: The bias circuit includes: a first resistor (R11) connected to a node of a third potential between a node of a first constant potential and a node of a second constant potential lower than the first constant potential; and a depletion type field effect transistor (Q11) having a drain connected to the node of the third potential via the first resistor and a gate and a source connected to the node of the second constant potential. The drain of the depletion type field effect transistor outputs a bias voltage of a first current source. <P>COPYRIGHT: (C)2012,JPO&INPIT |
