| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a current mirror circuit that ensures a wide output voltage range even upon a process variation. <P>SOLUTION: The low voltage cascode current mirror circuit includes N-channel MOS transistors Q1-Q5 and a resistive element 1. An overdrive voltage Vov_Q3 of the transistor Q3 is equal to the sum of overdrive voltages Vov_Q4, Vov_Q5 of the transistors Q4, Q5. The product of a constant current Ic and a resistance value R1 of the resistive element 1 is a saturation margin Vdsm_Q5 of the transistor Q5. Even upon a process variation, the saturation margin Vdsm_Q5 of the transistor Q5 thus remains unchanged. <P>COPYRIGHT: (C)2012,JPO&INPIT |
