Abstract
The offset-voltage compensation technique is proposed for an accurate current-source circuit. This current source is made of a transistor, a resistor, and operational amplifier feedback in order to achieve a high output resistance as well as high accuracy of a generated current signal. Discrepancy from the ideal value mainly results from the offset voltage of the operational amplifier. The transconductance amplifier is utilised with a feedback loop that is controlled by the switched-capacitor integrator. The proposed technique is incorporated in the light-emitting diode driver circuit applications and successfully verified with hardware measurement.
| Original language | English |
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| Pages (from-to) | 913-914 |
| Number of pages | 2 |
| Journal | Electronics Letters |
| Volume | 48 |
| Issue number | 15 |
| DOIs | |
| State | Published - 17 Jul 2012 |