This paper presents a novel design methodology for realizing a variation-aware widely tunable active inductor-based RF bandpass filter (BPF). The inductor-less filter is designed and implemented using voltage differencing transconductance amplifier (VDTA) as an active building block and a grounded capacitor, thereby validating its suitability for fully integrated circuit applications. Digital 'coarse' tuning and analog 'fine' tuning are employed to achieve better frequency coverage. The designed filter exhibits a tuning range of 1.65-3.015 GHz and a 3-dB bandwidth of 1400-122 MHz which translates into a quality factor of 1.17-24.71. It offers a voltage gain of 0-22.91 dB, noise figure of 28.16-28.95 dB, has a 1-dB compression point of 2.50-2.478 dBm and draws 0.065-0.232 mW power from 1-V power supply. Our proposed design shows a figure-of-merit of 82.08-91.27 dB, which is higher as compared to its counterparts available in the literature. The filter is implemented in 45-nm CMOS technology node using metal gate and strained silicon.
This paper proposes a compact, low power high frequency trigger pulse generator circuit. Delay-introducing circuit that can incorporate a certain amount of delay during signal processing while maintaining the signal integrity is utilized in the proposed design. This paper evaluates performance of various delay-introducing circuits in terms of different design matrices. Further, this paper exploits the low power consuming delay element to implement the proposed trigger pulse generator. The proposed design generates very high frequency pulses at the cost of negligible power consumption. The effectiveness of the proposed circuit is presented by producing ultra-thin pulses of pulse duration 92.35 ps while consuming power of only 1.502 ȝw. Extensive simulations are carried out on SPICE @ 16-nm predictive technology model to verify the proposed design.
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