the mixed-signal circuits with both analog and digital blocks on a single chip have wide applications in communication and rf circuits. integrating these two blocks can cause serious problems especially in applications requiring fast digital circuits and high performance analog blocks. fast switching in digital blocks generates a noise which can be introduced to analog circuits by the common su...

We describe a general offset-cancelling architecture for analog multiplication using chopper stabilization. Chopping is used to modulate the offset away the output signal where it can be easily filtered out, providing continuous offset reduction which is insensitive to drift. Both square wave chopping and chopping with orthogonal spreading codes are tested and shown to reduce the offset down to...

In this paper, a layout design for analog neural network designed using mentor graphics software based technology will ICFlow 0, 35. By using mentor graphics software ICFlow designing a layout of analog neural network component to a high speed camera and also perform simulations layout. Multiplier designing layouts, Op-amp layout, and Sigmoid layout. To generate the layout design rule check pro...

The Science Museum in South Kensington, London, was founded during Queen Victoria’s reign, and although it is imaginatively run and well worth a visit, it is scarcely renowned for its humor. But while I was in their Computer Science Area recently, I laughed so much, and so loudly, that I barely escaped arrest for disorderly behavior. The cause of my uncontrolled mirth was a glass case labeled “...

This paper examines analog CMOS circuit implementations of several common neural network algorithms. All circuits described perform in-circuit learning, using Gilbert multipliers as a primary circuit component. These include 3 μ m and 1.2 μ m designs for contrastive Hebbian learning, and Becker-Hinton networks (a variation of deltarule learning). In addition, unsupervised learning circuits for ...

We present an extension of the double-balanced current-commutating analog multiplier (also known as the Gilbert cell) that enables the multiplication of an arbitrary number of signed differential input voltages. A general analysis of the circuit for an arbitrary device nonlinearity is provided, and simulations on a bulk CMOS process as well as measurement results of a discrete bipolar implement...