Programmable resistor and analog computational circuits are essential for many applications such as analog signal processing units, automatic gain control, neural, fuzzy and instrumentation systems. A high-performance programmable grounded resistor (PGR) using complementary metal oxide semiconductor (CMOS) technology is proposed in this paper. A highly linear CMOS resistor with equivalent resistance ranging from 9.4 to 1.5 k is obtained by cancelling the nonlinear term present in the current equation of an MOSFET working in the linear region. The proposed resistor operates on both positive as well as negative input voltage. The inherited features of PGR are simplicity, extensive control voltage range, wider bandwidth and low-power dissipation. Additionally, analog computational units such as multiplier, squarer and divider are also discussed as applications of the PGR. All circuits are implemented and simulated using TSMC 0.13 µm CMOS technology in SPICE.
ARTICLE HISTORY
Abstract-Various adiabatic logic circuits can be used for minimizing the power dissipation. To enhance the functionality and performance of circuit two adiabatic logic families PFAL and ECRL have been used and compared with CMOS logic circuit design. In this paper, A MASTER-SLAVE D flip-flop is proposed by the use of SPICE simulation on 90nm technology files. The simulation result shows that PFAL is a better energy saving techniques then ECRL logic circuit.
Wireless sensor network is a growing field showing tremendous applications in the areas of medical assistance in hospitals. According to the Medical Statistics, everyday many patients' lives are affected due to negligence in the part of providing immediate care to the patients. Sometimes it is difficult for the staff in the hospitals to race against the time to reach the patient. Solution to this is a need of system that can measure patient health constantly. The main goal of this paper is to alert the staff in the hospitals in case of emergency. This system is designed using sensors and wireless technology with the help of Microcontroller. Sensors will continuously monitor the vital signs until an abnormal condition is detected. After detecting the abnormal condition, alert system comes into action which acts as a multi-alert system.
A high performance low voltage bulk driven quasi floating gate MOS based current mirror has been proposed. The combination of bulk driven and quasi FGMOS decreases the input impedance upto 120 Ω which is four times smaller than current mirror based on only bulk driven technique. The bandwidth has also been improved upto 173 MHz which is three folds of bandwidth of conventional bulk driven current mirror. Very high output impedance upto 1GΩ is achieved using self cascode technique in output section depending the value of factor m. Small signal analysis of proposed circuit verifies the simulated results. The circuit is simulated using 0.18μm CMOS technology with supply voltage of ±0.3V. The proposed current mirror is highly suitable for low voltage applications.
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