| 摘要 |
PROBLEM TO BE SOLVED: To reduce the variation of dead time generated by the change in temperature or.power supply voltage. SOLUTION: A clock generator 1 is constituted of a time constant circuit 2 and two threshold circuits 3, 4 arranged in parallel with the output of the circuit 2 and having respectively different threshold voltage values. The 1st threshold circuit 3 for obtaining a 1st phase clock signal ϕ1 to be a non-inverted output by judging the output of the circuit 2 by a 1st threshold VTH1 is constituted of the combination of inverters 3a, 3b having the circuit threshold VTH1 . The 1st threshold VTH1 is set up to a value higher than 1/2 VDD e.g. The 2nd threshold circuit 4 obtains a 2nd phase signal ϕ2 to be an inverted output by judging the output of the circuit 2 by a 2nd threshold VTH2 . The threshold VTH2 is set up to a value lower than 1/2 VDD. |
