Patent ID: 9048814
Filing Date: 2015-06-02
Classification: G06F,H03H,H03K,H04L

Abstract:
1. A resistance adjusting circuit comprising: a reference resistor; a first power source connected to a first terminal of the reference resistor and configured to output a first voltage; a first current source connected to a second terminal of the reference resistor and configured to output a first current based on a reference current which is set by using the reference resistor; a first variable resistor configured to include a first terminal, the first terminal being connected to an output terminal of the first power source; a second current source connected to a second terminal of the first variable resistor and configured to output a second current obtained by multiplying the first current by a reciprocal ratio, the reciprocal ratio being obtained as a reciprocal number of a ratio of a target resistance value of the first variable resistor to a resistance value of the reference resistor; and a controller configured to set the resistance value of the first variable resistor so that a voltage value at the second terminal of the reference resistor and a voltage value at a connecting part of the first variable resistor and the second current source become equal to each other.