Boots – shoes – and leggings
Patent
1986-06-26
1989-05-30
Harkcom, Gary V.
Boots, shoes, and leggings
364801, G06G 762, G06G 748
Patent
active
048357260
ABSTRACT:
An apparatus simulates an electronic circuit having a number of circuit elements, each being coupled to an associated set of nodes, a pair of which are capable of carrying a current therebetween, such as transistors. The apparatus has a selection device to select a circuit element to be simulated. A first memory is coupled with the selection device for storing the characteristics of each of the transistors. A transfer device transfers the characteristics from the first memory to a first register. A second memory stores the voltage present at each of the nodes, while a retrieval device retrieves the nodal voltages from the second memory and transfers them to a second register. Coupled to the first and second registers is a computation unit to ascertain the current flowing between the current carrying nodes and the subsequent change of voltage at those nodes. The apparatus carries out the simulation over a series of incremental time steps thereby providing an analog simulation of the circuit.
REFERENCES:
patent: 3631232 (1971-12-01), Perreault et al.
patent: 3775603 (1973-11-01), Ainsworth
patent: 3786242 (1974-01-01), Brooks
patent: 4354250 (1982-10-01), Lee
patent: 4383305 (1983-05-01), Lee
patent: 4499552 (1985-02-01), Kanazawa
patent: 4584662 (1986-04-01), Lin
David M. Lewis, "A Hardware Engine for Analogue Mode Simulation of MOS Digital Circuits", Design Automation Conference, Las Vegas, Nev., Jun. 25, 1985.
Harkcom Gary V.
University of Toronto - Innovations Foundation
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