| 摘要 |
This analog multiplexer core circuit (120A) is provided with: a differential pair (121) including two transistors (Q1, Q2); a differential pair (122) including two transistors (Q3, Q4); a differential pair (123) including two transistors (Q5, Q6); and a constant current source (124) which causes a current (IEE) to flow. The analog multiplexer core circuit (120A) multiplexes two analog signals (Ain1, Ain2) and outputs a time-multiplexed analog signal (Aout). An emitter resistance (REA1, REA2, REA3, REA4) is connected to each transistor (Q1, Q2, Q3, Q4). Here, the relational expression "REA·IEE≥amplitude of input analog signal" is satisfied. By this means the linear response input range of the differential pairs (121, 122) is broadened, and response linearity can be ensured. |
