Results 1 
3 of
3
Translinear Circuits Using Subthreshold FloatingGate MOS Transistors
 Analog Integrated Circuits and Signal Processing
, 1996
"... . We describe a family of currentmode circuits with multiple inputs and multiple outputs whose output currents are products and/or quotients of powers of the input currents. These circuits are made up of multipleinput floatinggate MOS (FGMOS) transistors operating in the subthreshold regime. The ..."
Abstract

Cited by 37 (9 self)
 Add to MetaCart
. We describe a family of currentmode circuits with multiple inputs and multiple outputs whose output currents are products and/or quotients of powers of the input currents. These circuits are made up of multipleinput floatinggate MOS (FGMOS) transistors operating in the subthreshold regime. The powers are set by capacitor ratios; hence, they can be quite accurate. We analyze the general family of such circuits and present experimental data from several members that we fabricated in a standard 2¯m doublepoly pwell process through MOSIS. 1. Introduction Information processing using analog VLSI systems has recently become the subject of much interest and active research [1], [2]. In particular, the currentmode approach is the focus of much attention [3]. In this paradigm, the quantities of interest are represented by currents, whereas the circuit voltages are thought of as playing only an incidental role. Among the vast array of nonlinear operations required to perform currentmod...
Implementing Rotation Matrix Constraints in Analog VLSI
"... We describe an algorithm for continuously producing a 3x3 rotation matrix from 9 changing input values that form an approximate rotation matrix, and we describe the implementation of that constraint in analog VLSI circuits. This constraint is useful when some source (e.g., sensors, a modeling system ..."
Abstract
 Add to MetaCart
We describe an algorithm for continuously producing a 3x3 rotation matrix from 9 changing input values that form an approximate rotation matrix, and we describe the implementation of that constraint in analog VLSI circuits. This constraint is useful when some source (e.g., sensors, a modeling system, other analog VLSI circuits), produces a potentially "imperfect" matrix, to be used as a rotation. The9 values are continuously adjustedover time to find the "nearest" true rotation matrix, based on a leastsquares metric. The constraint solution is implemented in analog VLSI circuitry; with appropriate design methodology [Kirk 93], adaptive analog VLSI is a fast, accurate, and lowpower computational medium. The implementation is potentially interesting to the graphics community because there is an opportunity to apply adaptive analog VLSI to many other graphics problems. CR Categories and Subject Descriptors: C.1.2[Processor Architectures]: Multiprocessors  parallel processors; C.1.3...