| 摘要 |
PROBLEM TO BE SOLVED: To obtain a differential output circuit, in which an offset level VOS of output amplitude can be controlled accurately by controlling the variation of a divided voltage Vz. SOLUTION: The differential output circuit comprises a constant-current circuit section, comprising a reference voltage circuit 2, an amplifier circuit 3, a resistor R1, an N-channel MOS transistor M1 and a P-channel MOS transistor M2, a mirror circuit section comprising P-channel MOS transistors M3, M4 and M5, a data transfer switch circuit section comprising a data input terminal, an inverter circuit 5, output terminals Vo+, Vo-, P-channel MOS transistors M4 and M5 and N-channel MOS transistors M6 and M7, and an offset-level regulating circuit section comprising the N-channel MOS transistors M6 and M7 and a resistor R2.
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