In recent scenario many appliances requires DC power supply. Hence to obtain the DC power from input ac supply, Power Electronics circuits like Rectifiers which is a non-linear load has to be used. The current drawn by these non-linear load will be phase will not follow the supply voltage (i.e non sinusoidal). This results in a High Total Harmonic Distortion (THD) and Low Power Factor (PF). Hen...

We describe circuit techniques for a Flash memory which operates with a VDD of 1.5 V. For the interface between the peripheral circuits and the memory core circuits, two types of level shifter circuits are proposed which convert a VDD level signal into the high voltage signals needed for high performance. In order to improve the read performance at a low VDD , a new self-bias bitline voltage se...

This article presents a new current-mode multiplier/divider based on MO-CDTA (Multiple output current conveyor transconductance amplifier). The circuit description is very simple, its construction consists of only one MO-CDTA. Without external passive elements, the proposed circuit is then suitable for IC architecture. The PSpice simulation and experimental results are depicted, and agree well ...

ELECT An ultra-low-power tunable bump circuit is presented. It incorporates a novel wide-input-range tunable pseudo-differential transconductor linearised using the drain resistances of saturated transistors. Measurement results show that the transconductor has a 5 V differential input range with <20% of linearity error. The bump circuit demonstrates tunability of the centre, width and height, ...

Low-power switched-mode power supply converters are used in applications where size and efficiency are critical. The buck converter size can be reduced by elimination of the bulky filter capacitor. The filtering function of this capacitor can be replaced by an output current ripple compensation circuit. The compensating circuit is applied, based on inductor current measurement and linear amplif...

In this paper, we propose an Active Body-biasing Controlled (ABC)-Bootstrap PTL (Pass-Transistor Logic) on PD-SOI for ultra low power design. Although simply lowering the supply voltage (VDD) causes a lack of driving power, our boosted voltage scheme employing a strong capacitive coupling with ABC-SOI improves a driving power and allows lower voltage operation. We also present an SOI-SRAM desig...

In this paper, we suggest that the dynamic power dissipation of a circuit can be used to detect faults in it. The change in dissipation caused by a fault can be maximized by applying speciic test vectors. For example circuits, we show that the power dissipation can be used to detect faults which do not aaect static power dissipation. We also discuss how faults may be detected with a frequency d...

An ultra-low-power constant charge injector (CCI) circuit is presented for wirelessly-powered electro-acupuncture (EA). The CCI adopts adaptive pulse-width and frequency-drift (APF) calibration loop that not only accommodates to body impedance variation (BIV) of 100-200k but also is tolerable to frequency-drift. The proposed 5Hz current starving clock generator combined with sub-Vth reference ...

The objective of this work is to develop a new logic circuit synthesis and optimization procedure for arbitrary logic function. Following the procedure, we may get a new high performance logic circuit family, which has low power consumption, low power-delay product, area efficiency and suitable for low supply voltage. The new logic family based upon the proposed design procedures has certain ad...

In This Issue 2 Editor’s Notes; New Product Introductions 3 An Introduction to MEMS Vibration Monitoring 6 Complex Power-Supply Sequencing Made Easy 9 Creative Compensation Enables Tiny Amplifier to Drive 200-mW Loads 13 Simple Circuit Allows Backward Compatibility for Digital Power Controllers 16 Capacitance-to-Digital Converter Facilitates Level Sensing in Diagnostic Systems 19 Current-Output...