Patent ID: 8441312
Filing Date: 2013-05-14
Classification: G05F

Abstract:
1. A reference current generating circuit comprising: a first current mirror circuit comprising: a first transistor of a first polarity being an input-side transistor of said first current mirror circuit; and a first resistor connected between a gate of said first transistor and a power supply terminal; a second current mirror circuit comprising a second transistor of a second polarity complementary to said first polarity, said second transistor being an input-side transistor of said second current mirror circuit; a first output terminal; and a second output terminal, wherein an output node of said first current mirror circuit is connected to an input node of said second current mirror circuit, an input node of said first current mirror circuit is connected to an output node of said second current mirror circuit, a control voltage applied to the gate of said first transistor is output from said first output terminal, and a control voltage applied to a gate of said second transistor is output from said second output terminal, wherein said first current mirror circuit further comprises a third transistor of said first polarity being an output-side transistor of said first current mirror circuit, wherein a gate of said third transistor is connected to a drain of said first transistor, and a drain of said third transistor is connected to said output node of said first current mirror circuit, wherein said second current mirror circuit further comprises a fourth transistor of said second polarity being an output-side transistor of said second current mirror circuit, wherein a gate of said fourth transistor is connected to a drain of said second transistor, and a drain of said fourth transistor is connected to said output node of said second current mirror circuit, wherein said second current mirror circuit further comprises a second resistor connected between a source of said fourth transistor and another power supply terminal.