Patent ID: 7170337

Claim:
A circuit comprising: a first supply voltage port; a second supply voltage port; a current mirror circuit comprising a first current mirror port and a second current mirror port, the second current mirror port for propagating an input current from the first supply voltage port to the second supply voltage port through the current mirror circuit coupled there between, where the first current mirror port is for providing N times the input current; a current ratioing circuit comprising a first portion disposed between the first current mirror port and the second supply voltage port and a second portion disposed between the first supply voltage port and the second supply voltage port, the second portion comprising a load current path, where the current ratioing circuit is for propagating M times N times the input current through the load current path, wherein the first portion of the current ratioing circuit comprises a first bipolar transistor having a first base terminal, and one of a first collector terminal and first emitter terminal coupled with the first current mirror port, and the other of the first emitter terminal and the first collector terminal thereof coupled with the second supply voltage port, and wherein the second portion of the current ratioing circuit comprises a second bipolar transistor having a second base terminal coupled with the first base terminal, and one of a second collector terminal and second emitter terminal coupled to the load current path, and the other of the second emitter terminal and the second collector terminal thereof coupled with the second supply voltage port, wherein the second bipolar transistor is M times larger than the first bipolar transistor; a bias current path disposed between the first supply voltage port and the coupled first and second base terminals for propagating current therein in response to the input current; and wherein at least one of N and M is other than 1.