| 摘要 |
PURPOSE:To reduce the number of elements by connecting first PMOS and NMOS transistors TRs in series between different power sources. CONSTITUTION:A P-channel MOS TR P1 and an channel MOS TR N1 are connected in series between a power source (positive side) V and a power source (negative side) G. When an in-phase control terminal C is in the high level and an anti-phase control terminal the inverse of C is in the low level, TRs P2 and N2 are turned off together. Therefore, TRs P1 and N1 are turned off together, and an output terminal O is set to a high impedance state independently of the input signal from an input terminal I. When the in-phase control terminal C is in the low level and the anti-phase control terminal the inverse of G is in the high level, TRs P2 and N2 are turned on together, and the inverted output of the input signal is obtained in the output terminal O because the input signal from the input terminal I is transmitted to gates of TRs P1 and N1. Thus, the number of elements is reduced and their occupation area is reduced. |
