# A VLSI analog computer/math co-processor for a digital computer

@article{Cowan2005AVA, title={A VLSI analog computer/math co-processor for a digital computer}, author={G. Cowan and Robert C. Melville and Yannis P. Tsividis}, journal={ISSCC. 2005 IEEE International Digest of Technical Papers. Solid-State Circuits Conference, 2005.}, year={2005}, pages={82-586 Vol. 1} }

A single-chip VLSI analog computer having 80 integrators and 336 other programmable linear and nonlinear circuits is fabricated in a 0.25 /spl mu/m CMOS process. The chip can be used to accelerate a digital computer's numerical routines. The IC is 1 cm/sup 2/ and consumes 300 mW.

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## 34 Citations

### A VLSI analog computer/digital computer accelerator

- Computer ScienceIEEE Journal of Solid-State Circuits
- 2006

The design of a single-chip VLSI analog computer fabricated in a 0.25-/spl mu/m CMOS process is described, used to simulate ordinary differential equations (ODEs), partial differential equations, and stochastic differential equations with moderate accuracy, significantly faster than a modern workstation.

### About using analog computers in today's largest computational challenges

- Computer ScienceAdvances in Radio Science
- 2021

Analog computers can be revived as a feasible technology platform for low precision, energy efficient and fast computing by measuring the performance of a modern analog computer and comparing it with that of traditional digital processors.

### Continuous-time DSPs, analog/digital computers and other mixed-domain circuits

- MathematicsProceedings of the 31st European Solid-State Circuits Conference, 2005. ESSCIRC 2005.
- 2005

This paper reviews recent research, involving circuits and systems which mix domains traditionally kept separate, and it is argued that by mixing domains one can have advantages which would not otherwise be possible.

### Solving systems of linear equations on analog computers

- Computer Science2019 Kleinheubach Conference
- 2019

This article outlines a technique making it possible to employ analog computers to the solution of linear equations, and uses these as initial vectors for a classic iterative algorithm running on the digital computer to further enhance the precision of the solution obtained.

### Analog Representations in Digital Arithmetic: A Review

- Computer Science2018 52nd Asilomar Conference on Signals, Systems, and Computers
- 2018

This paper reviews number representation schemes that are based on the analog encoding of numeric values in an otherwise digital arithmetic system, showing them to be closer than ever to practical realizability.

### Continuous-time hybrid computation with programmable nonlinearities

- Computer ScienceESSCIRC Conference 2015 - 41st European Solid-State Circuits Conference (ESSCIRC)
- 2015

This work presents the first continuous-time hybrid computing unit in 65nm CMOS, capable of solving nonlinear differential equations up to 4th order, and scalable to higher orders, and uses it in a low-power cyber-physical systems application.

### Energy-Efficient Hybrid Analog/Digital Approximate Computation in Continuous Time

- Computer ScienceIEEE Journal of Solid-State Circuits
- 2016

A unit that performs continuous-time hybrid approximate computation, in which both analog and digital signals are functions of continuous time, is presented, capable of solving nonlinear differential equations up to 4th order, and is scalable to higher orders.

### A Radio Frequency Analog Computer for Computational Electromagnetics

- Computer ScienceIEEE Journal of Solid-State Circuits
- 2021

Software-programmable analog computing is proposed for power- and area-efficient acceleration of computational electromagnetics. All-pass filters are employed to realize a continuous-time…

### Reconfigurable Digital/Analog Processor Array for the Simulation of Gene Regulatory Networks

- Computer Science2006 49th IEEE International Midwest Symposium on Circuits and Systems
- 2006

A prototype of an efficient platform which combines a general FPGA architecture with fairly simple, specialized and configurable computational elements is presented and it is shown how the prototype can be configured to simulate two simple example networks.

### Evaluation of an Analog Accelerator for Linear Algebra

- Computer Science2016 ACM/IEEE 43rd Annual International Symposium on Computer Architecture (ISCA)
- 2016

A reconfigurable analog accelerator for solving systems of linear equations is presented and it is found that the analog accelerator approach may be an order of magnitude faster and provide one third energy savings, depending on the accelerator design.

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