A 0.6-V Zero-IF/Low-IF Receiver With Integrated Fractional-N Synthesizer for 2.4-GHz ISM-Band Applications

Abstract

Supply voltage reduction with process scaling has made the design of analog, RF and mixed mode circuits increasingly difficult. In this paper, we present the design of an ultra-low voltage, low power and highly integrated dual-mode receiver for 2.4-GHz ISM-band applications. The receiver operates reliably from 0.55-0.65 V and is compatible with commercial standards such as Bluetooth and ZigBee. We discuss the design challenges at low voltage supplies such as limited f T for transistors and higher nonlinearities due to limited available signal swing, and present the architectural and circuit level design techniques used to overcome these challenges. The highly integrated receiver prototype chip contains RF front-end circuits, analog baseband circuits and the RF frequency synthesizer and was fabricated in a standard digital 90-nm CMOS process; it achieves a gain of 67 dB, noise figure of 16 dB, IIP 3 of 10.5 dBm, synthesizer phase noise of 127 dBc/Hz at 3-MHz offset, consumes 32.5 mW from 0.6 V and occupies an active area of 1.7 mm 2 .

A 2.4-GHz ZigBee Receiver Exploiting an RF-to-BB-Current-Reuse Blixer + Hybrid Filter Topology in 65-nm CMOS

“…3.17b). The chip summary and performance benchmarks are given in Table 3.2, where [7,8] are current-reuse architectures, [23] is a classical architecture with cascade of building blocks, and [5] is an ultra-low-voltage design. For this work, the results measured under a 10-GHz on-chip VCO are also included for completeness, but they are more sensitive to test uncertainties.…”

Optimal Low Power Complex Filters

“…Chapter 5 compares the proposed solutions in order to converge to optimal designs through assessments of power, non-ideal frequency operation (parasitic poles [12], filters based on CCII and CA are mainly presented, since despite some limitations they have more degrees of freedom for design because gain and bandwidth are independent [26]- [27]. In conclusion, the first-order filters and LC simulation filters are not efficient to be used compare to second order filters so according to Table I which is the comparison between recent published complex filters, research methodology will be presented .…”

An ultra-low power 400MHz OOK transceiver for medical implanted applications

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