Abstract
This paper presents a trim-free low-voltage and low-power CMOS current reference which achieves high current stability to temperature variation. In order to achieve process-insensitive temperature compensation, the proposed circuit employs ratio between the process-independent temperature coefficients of resistor and compensation voltage. The proposed current reference is implemented in 0.18-μm CMOS technology and consumes 1.4 μW from a 1-V supply. It achieves temperature coefficient of 24.9 ppm/°C with 0 °C to 100 °C of temperature variation without trimming, which is the lowest among the recently reported CMOS current references.
| Original language | English |
|---|---|
| Article number | 6247480 |
| Pages (from-to) | 2527-2533 |
| Number of pages | 7 |
| Journal | IEEE Journal of Solid-State Circuits |
| Volume | 47 |
| Issue number | 10 |
| DOIs | |
| State | Published - 2012 |
Bibliographical note
Funding Information:Manuscript received August 22, 2011; revised March 22, 2012; accepted May 21, 2012. Date of publication July 23, 2012; date of current version October 03, 2012. This paper was approved by Associate Editor Ken Shepard. This work was supported by the Basic Science Research Program through the National Research Foundation of Korea, funded by the Ministry of Education, Science and Technology under Grant 2011–0026434.
Keywords
- CMOS
- current reference
- low power
- low supply voltage
- process-insensitive
- temperature compensation