Search

The comparator is the basic block for data converter circuits, designing modern analog and mixed-signal systems, for example, telecommunications that interface with sensing circuits. Several analog to digital converters (ADCs) require low-power, high-speed comparators through less area of chip. The spin device-based self-calibrated comparators are accustomed to design high-speed, low-offset and power ADCs. This paper presents two spin devices based on self-calibrated comparator, which is an area and power efficient compared with other comparators. Our proposed self-calibrated comparator consumes 1.3 µW power and 0.0272 fJ energy at a supply voltage of 0.75 V. The spin devices (MTJ and a Strip), SPICE compatible model-based Verilog-A language and PTM CMOS 45 nm model are used to simulate its performance, like the power and delay, and compared it with dynamic comparators.

Orthogonal Frequency Division Multiplexing (OFDM) is a spectrally efficient multicarrier modulation technique for high-speed data transmission over multipath fading channels. One the major issues in OFDM is a large ratio between peak and average power, which affects Power Amplifiers in terms of complexity. A lot of techniques have proposed to reduce the power ratio but transmitted power, bit error rate (BER), etc. are so high. In this paper, combined SLM and proposed Tone Reservation methods are performed to reduce for power ratio between peak and average. Proposed Tone Reservation is the best suitable technique, based on BER and CCDF performance of the system.

The pre-charge sense amplifier is essential for the design of hybrid circuits based on the combination of CMOS and spin devices like magnetic tunnel junction (MTJ). The double tail sense amplifier (DTSA) offers better reliability, power efficiency and good performance. This paper offered a novel modified double-tail sense amplifier' (MDTSA) and compared its performance in terms of delay, power and sensing error with the existing DTSA.

The pre-charge sense amplifier (PCSA) offers good trade-off between reliability, efficiency and performance. The hybrid combination in PCSA gives better result due to non-volatile nature of Magnetic Tunnel Junction. In this paper, performance of proposed Sense Amplifier (SA) has been evaluated in terms of delay and power and compared with another Sense amplifier (SA). The proposed double tail sense amplifier (DTSA) consumes 11.162 µW and 0.3405 fJ energy at the supply voltage of 0.75V. This proposed comparator can operate at high frequency. The simulations is produced to investigate its process variation with help of Monte Carlo method.