Alfredo Perez-Carrillo, S. Taylor, J. Silva-Martínez, A. Karsilayan
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A large-signal blocker robust transimpedance amplifier for coexisting radio receivers in 45nm CMOS
A baseband transimpedance amplifier for coexisting radio receivers is presented. It exploits active feedback to improve out-of-band large-signal attenuation, minimizing in-band distortion due to close-in blockers. A fully-differential prototype of the proposed solution has been designed and implemented in 45nm CMOS. Experimental results show that it can handle linearly single tones of ±10mA, withstanding blocking currents of ±9mA at 50MHz and beyond before reaching P1dB in a 10MHz bandwidth. The fabricated device occupies 0.25mm2, largely MOM finger capacitors, and draws 17mA from a 2.5V supply.
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