| 摘要 |
PROBLEM TO BE SOLVED: To provide a reference differential voltage signal generation circuit for high speed differential comparator circuitry.SOLUTION: Differential reference voltage signals Vrefp, Vrefn control a threshold voltage of the high speed differential comparator circuitry. An operational amplifier circuit 220 having an output connected to a gate of a PMOS transistor 230 operates such that a common mode voltage Vcm_ref of the reference signals tracks a common mode voltage Vcm of differential high speed serial data signals Vip, Vin. |
