Current references represent important building blocks in bipolar and CMOS designs. They usually act as biasing structures that deserve other applications, but, sometimes, they can be used as independent circuits. The most used, PTAT (proportional to absolute temperature) current references represent essential blocks in a voltage reference, required for compensating the negative decrease with temperature term from base–emitter, gate–source, or threshold voltages or for biasing the active device from the voltage reference core. CTAT (complementary to absolute temperature) current references have an approximately negative linear decrease on temperature variation, a design that fulfills the complementary of PTAT and CTAT currents presenting an improved temperature behavior. PTAT2 and PTAT n currents represent the basis of implementing superior-order curvature-correction techniques in order to obtain an extremely low temperature coefficient of the voltage reference.
KeywordsOutput Current CMOS Technology Bipolar Transistor Current Reference Current Mirror
- 1.Gray PR, Meyer RG (1993) Analysis and Design of Analog Integrated Circuits, 3rd Edition. Wiley, New YorkGoogle Scholar
- 2.Huang Shizhen et al. (2008) A Design of High PSRR CMOS Voltage Reference Based on Subthreshold MOSFETs. The 3rd IEEE Conference on Industrial Electronics and Application 2495–2498Google Scholar
- 6.Popa C (2004) FGMOST-Based Temperature-Independent Euclidean Distance Circuit. The 9th International Conference on Optimization of Electric and Electronic Equipment 29–32Google Scholar
- 7.Popa C (2004) CMOS Pseudo-Exponential Circuit Based on a New Average Potential Principle. The 8th International Workshop on Symbolic Methods and Applications to Circuit DesignGoogle Scholar
- 8.Popa C (2004) A Digital-Selected Current-Mode Function Generator for Analog Signal Processing Applications. The 27th Edition Annual Semiconductors Conference 495–498Google Scholar