Naslov
Efficient and Reusable Offset Cancellation Method Implemented in CMOS Design

Autori
Mrković, Boško ; Broz, Ivo ; Ribić, Dean

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of Microelectronics, Electronics and Electronic Technology /MEET / Biljanović, Petar ; Skala, Karolj - Opatija : Hrvatska udruga za informacijsku i komunikacijsku tehnologiju, elektroniku i mikroelektroniku - MIPRO, 2009, 175-179

ISBN
978-953-233-044-1

Skup
MIPRO 2009 32nd International Convention

Mjesto i datum
Opatija, Hrvatska, 25.05.2009. - 29.05.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
IDAC structure; SAR counter

Sažetak
An efficient and reusable offset cancellation method is presented, applicable for all amplifier structures with input resistances. The offset is cancelled with the current injected into amplifier's split input resistances. To keep the compensation range equal over the all working conditions, the compensation current is generated using the resistor from the voltage reference, matched with the amplifier's resistors. The compensation current value is generated with the simple IDAC structure, controlled by SAR or even a simple counter, depending on the available compensation time. Such approach requires a simple circuitry and it is very easy to implement. The effect to compensated amplifier's noise and linearity is low and controllable, while the effect to the gain accuracy doesn't exist. Additional advantage of using current instead of voltage for compensation is in insensitivity to interferences. By using a simple circuit for offset cancellation range adjusting, the proposed method becomes reusable.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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