Patent ID: 8760143
Filing Date: 2014-06-24
Classification: G05F

Abstract:
1. A reference current generation circuit, comprising first and second reference current generation circuits for generating first and second reference currents, respectively, and a current output circuit for outputting a third reference current by adding the first and second reference currents, the first reference current generation circuit including: a first current-voltage conversion circuit provided with a first series circuit having a first resistor and a first diode, and a second resistor connected in parallel with the first series circuit; a second current-voltage conversion circuit having a second diode; and a first current supply circuit to provide a substantially equal amount of current to the first and second current-voltage conversion circuits respectively, the second reference current generation circuit including: a third current-voltage conversion circuit provided with a second series circuit having a third resistor and a third diode; a fourth current-voltage conversion circuit having a fourth diode; a fifth current-voltage conversion circuit having a fourth resistor; and a second current supply circuit to provide a current to the fourth current-voltage conversion circuit, and to divide and provide an amount of current substantially equal to that of the current provided to the fourth current-voltage conversion circuit, to the third and fifth current-voltage conversion circuits respectively.