| 摘要 |
PURPOSE:To assure stable signal transmission under no influence of wiring impedance on each functional circuit part from a signal source side by a method wherein an impedance conversion means is mounted on the output side of a signal source of functional circuit part. CONSTITUTION:A voltage source 27 as a signal source is connected to a bias input terminal 6 to supply bias voltage VB as a signal to be transmitted from the voltage source 27. Then the bias voltage VB is supplied for a voltage current conversion circuit 28 mounted as an impedance conversion means while the current from collector sides of respective transistors 32-34, 36 is supplied for functional circuits 30a-30d, 30f through the intermediary of wiring conductors 40, 42, 46, 48. The impedance in a signal source side is converted into higher impedance capable of neglecting a wiring impedance to make the current transmission stable. Besides, current processing circuits 54, 58 are impedance- converted to make signal transmission stable.
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