Random Access Analog Memory for Early Vision

Early-vision problems require huge amounts of computer power. The utilization of analog circuits to cope with this problem has been hampered by the lack of an efficient way to store images for a discrete amount of time. In this communication, we investigate the use of an analog memory as a full-frame buffer. Two different momories have been built using a standard CMOS-ASIC process. Measurements carried out on these circuits and an analysis of their area occupation show the advantage of using analog storage for full-frame buffers.

[1]  David Renshaw,et al.  ASIC image sensors , 1990, IEEE International Symposium on Circuits and Systems.

[2]  Michel Declercq,et al.  Implementation of a learning Kohonen neuron based on a new multilevel storage technique , 1991 .

[3]  Carver Mead,et al.  Analog VLSI and neural systems , 1989 .

[4]  Daniele D. Caviglia,et al.  Selfrefreshing analogue memory cell for variable synaptic weights , 1991 .

[5]  V. Hu,et al.  EEPROM device as a reconfigurable analog element for neural networks , 1989, International Technical Digest on Electron Devices Meeting.

[6]  Misha Mahowald,et al.  A silicon model of early visual processing , 1993, Neural Networks.

[7]  M. Y. Lu,et al.  ASIC vision , 1990, IEEE Proceedings of the Custom Integrated Circuits Conference.

[8]  M.J.M. Pelgrom,et al.  Matching properties of MOS transistors , 1989 .

[9]  J. L. White,et al.  An active resistor network for Gaussian filtering of images , 1991 .

[10]  Eric A. Vittoz,et al.  Charge injection in analog MOS switches , 1987 .

[11]  Berthold K. P. Horn,et al.  An object position and orientation IC with embedded imager , 1991 .

[12]  Kobchai Dejhan,et al.  Design of a low-power 32 K CMOS programmable delay-line memory , 1990 .

[13]  Yannis Tsividis,et al.  Analogue circuits for variable-synapse electronic neural networks , 1987 .

[14]  Amnon Yariv,et al.  Semiparallel microelectronic implementation of neural network models using CCD technology , 1987 .

[15]  W. Hubbard,et al.  A programmable analog neural network chip , 1989 .