Neuromorphic systems make use of a set of specific functions that exhibit specific or unconventional behavior. These include winner-take-all (WTA), weighted average, and thresholding functions. These can be integrated using various design techniques, including analog, digital, standard, and subthreshold realizations. In this paper, we present a brief survey of charge-based realizations of sever...

Abstract CMOS processes that have been developed primarily for logic are now increasingly used for analog and mixed signal applications. Process restrictions, wide parametric variance, and noisy application environments lead to special efforts in circuit design/architecture, layout techniques, and optimizing the use of a limited process. This paper addresses a combination of techniques that pro...

The strong interaction between Electronic Design Automation (EDA) tools and Complementary Metal-Oxide Semiconductor (CMOS) technology contributed substantially to the advancement of modern digital electronics. The continuous downscaling of CMOS Field Effect Transistor (FET) dimensions enabled the semiconductor industry to fabricate digital systems with higher circuit density at reduced costs. T...

An architecture for a time interpolation circuit with an rms error of 25 ps has been developed in a 0.7m CMOS technology. It is based on a delay locked loop (DLL) driven by a 160-MHz reference clock and a passive RC delay line controlled by an autocalibration circuit. Start-up calibration of the RC delay line is performed using code density tests (CDT). The very small temperature/voltage depend...

This paper presents the design of a Current-toVoltage (I−V) and Voltage-to-Current (V−I) converters for use in current-mode analog integrated circuits are described. The proposed I−V converter and V-I Converter has high linear range. The circuit uses MOS transistors in linear and saturation regions to produce an output current linearly related to the input voltage. Both circuits have been imple...

A CMOS amplifier / analog-to-digital (A/D) converter for the measurement of ultralow currents like photocurrents down to the subpicoampere range and with a bandwidth of some kHz is presented. Double sampling of the integrated current by a window comparator eliminates clockfeedthrough, kT/C-noise as well as nonlinearities of the amplifier, which is operated in a switched-current like mode. The c...

The need for miniaturization in advanced science sensor systems has led to technology, the active pixel image sensor (APS). The development of CMOS timing and control electronics, imaging detector arrays, signal chains and the development of a ncw image sensor APS technology allows the integration of analog-to-digital conversion on a single integrated circuit. The impact on the-im;ging system i...

A precision CMOS voltage reference circuit is very important for the design of the stable voltage down converter of the high density VLSIs. By using the active mode operation of the component MOS transistors a CMOS bandgap type reference voltage circuit was redesigned for the enhancement of the circuit stability against the internal noises. The voltage supply independence, temperature independe...

A 0.35microm CMOS integrated circuit for multi-channel neuronal recording with twelve true-differential channels, band separation and digital offset calibration is presented. The measured signal is separated into a low-frequency local field potential and high-frequency spike data. Digitally programmable gains of up to 60 and 80 dB for the local field potential and spike bands are provided. DC o...