| 摘要 |
PROBLEM TO BE SOLVED: To multiply or divide plural current values by providing the successively emitter-follower connected transistor pairs of two systems and turning the collector current of respective transistors to an input current or an output current. SOLUTION: The successively emitter-follower connected transistor pairs Q1-QN and Q1'-QN' of the two systems are provided, the base voltages of the transistors QN and QN' of an initial stage are equalized, the transistors Q1 and Q1' of a final stage are emitter-grounded, the collector currents IN-I2 and IN'-I2 ' of the respective transistors excluding the final stage are made to flow through a current source with an emitter-follower to a ground potential and the collector current of the respective transistors is turned to the input current or the output current. The product of the collector current is equalized by equalizing the sum of voltages VBE between a base and an emitter in such a manner and the multiplication or division of the current values is realized by turning the collector current of the respective transistors to the input current or the output current. |
