A chopper-based, CMOS current sense amplifier for power management applications in mobile communications

Abstract

Mobile communications research and development is presently in significant growth, due to the advent of the very low power consumption requirement in wireless and mobile application circuits. In such a circuit there is an additional need to monitor the current that flows from and to the battery. This current can be as high as 2A for GSM applications. We present a low-offset current sense amplifier that can allow sensing of currents as low as 10mA.