Reference current generation system and method

Details Reference current generation system and method Reference current generation system and method

2005-05-10

2005-05-10

Nguyen, Matthew V. (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

C327S535000

Reexamination Certificate

active

06891357

ABSTRACT:
As disclosed herein, systems and methods are provided for generating and distributing a plurality of reference currents on an integrated circuit. In a particular embodiment, an integrated circuit is disclosed which includes a reference current generator adapted to generate a plurality of reference currents. Such circuit includes an operational amplifier coupled to receive, at a first polarity input, a reference voltage, and a first transistor Q1having a biasing input coupled to an output of the operational amplifier. The first transistor also has an output coupled to a fixed potential through a first resistor R1, and the output of the first transistor Q1is further coupled as feedback to a second polarity input of the operational amplifier. One or more second transistors Qi are provided in the circuit, each of which has a biasing input coupled to the output of the operational amplifier, and an output coupled to the fixed potential through a respective second resistor Ri. In order to conserve chip area and power, the outputs of the second transistors Qi are not coupled as feedback to the operational amplifier. By the action of the operational amplifier, bias is maintained on the first transistor Q1and each of the second transistors Qi for each to conduct a reference current Isi.

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