Reference current generation circuit for bias voltage generation circuit, has current compensation unit removing increment of current increasing in inverse proportion to power supply voltage for forming compensated current

摘要

The circuit has a constant current generator (401) with current mirrors (410, 420) and a current compensation unit (430), where the current mirror (420) acts as a current source for the current mirror (410). The unit (430) removes an increment of a current (I1) increasing in inverse proportion to a power supply voltage for forming a compensated current (I3), where the current (I1) is generated by the current mirror (410). The unit (430) has a negative MOS transistor (431) having a gate coupled to a node (N2), a drain coupled to a node (N1) and a source coupled to a reference voltage (VSS).