A new carry-free division algorithm will be described; it is based on the properties of RSD arithmetic to avoid carry propagation and uses the minimum hardware per bit i.e. one full-adder. Its application to a 1024 bits RSA cryptographic chip will be presented. Thanks to the features of this new algorithm, high performance (8 kbits/s for 1024 bits words) was obtained for relatively small area and power consumption (80 mm2 in a 2 pm CMOS process and 500 mW at 25 MHz).
This paper presents YELLOWSTONE, a single chip, low-voltage, synchronous Buck DC-DC converter implementing a current mode PWM controller with built-in N & P-channel power MOSFETs. It aims to be used as a Point-of-Load (PoL) switched mode power supply with a maximum output current of 500mA. It generates from a typical +3.3V or +5V voltage input a lower voltage output between +0.9V and +3.3V configurable by an external resistor network. It has been specified and designed for operation at temperatures from −55°C to +225°C. Synchronous rectification increases efficiency and reduces external components count. The circuit achieves power efficiencies in excess of 90%. The chip implements a current mode PWM control which enables a fast response to line and load transient variations. A high switching frequency (1.5MHz typical with internal clock and up to 2MHz with external clock) has been selected enabling a dramatic reduction of the number and size of passive external components. The current mode control made possible to use a simple compensation loop and to integrate it. High integration level, tiny IC package (5mm*5.5mm) and small external passive components, lead to a very small footprint for the complete PoL function, i.e. as small as 0.25inch2 (10mm*15mm).
A single-chip implementation of t h e GSM full-rate vocoder is presented.Maximum integration has been achieved through t h e use of DSP CORE technology. The impact of this technology on t h e design methodology and testability will b e described. This component is one of t h e key building blocks of t h e ALCATEL GSM handportable station. This chip is designed die size. 10.3.1 IEEE 1992 CUSTOM INTEGRATED CIRCUITS CONFERENCE 0-7803-0246-x/92 $3.00 1992 IEEE
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.