RESISTANCE VALUE DISCRIMINATING CIRCUIT,申请号JP19830024775-传众专利搜索

RESISTANCE VALUE DISCRIMINATING CIRCUIT

申请公布号：JPS59151067(A)

申请号：JP19830024775

申请日期：1983.02.18

申请公布日期：1984.08.29

申请人：

HITACHI SEISAKUSHO KK

发明人：TAKAMIYA MASASHI

分类号：G01R27/14

主分类号：G01R27/14

摘要：PURPOSE:To simplify the configuration of a circuit by connecting a resistance to be decided between the emitter of a prescribed transistor and the ground, in a control system. CONSTITUTION:When each signal (h) and (g) of high and low is outputted from a controller 23, a transistor TR18 becomes on, an integral capacitor C20 of an operational amplifier 21 is discharged, a negative side input signal (e) of the amplifier 21 is cut off, and inter-terminal voltage of C20 becomes about zero. Subsequently, when the signal (h) becomes low, the TR18 becomes off, a current being proportional to its conductance flows through a TR11 and a resistance 13 to be decided, and an output signal (f) of a comparator 22 becomes high by charging of C20. Next, the charging potential of C20 rises, and after a prescribed time, a signal (g) becomes high, a current being proportional to its conductance flows to a reference resistance 14, discharge of C20 is executed, and the signal (f) becomes low. The controller 23 meausres the time extending from the time when the signal (g) becomes high to the time when the signal (f) becomes low, and discriminates a resistance value of the resistance to be decided 13.