In this paper we present an electronic circuit for position or capacitance estimation of MEMS electrostatic actuators based on a switched capacitor technique. The circuit uses a capacitive divider configuration composed by a fixed capacitor and the variable capacitance of the electrostatic actuator for generating a signal that is a function of the input voltage and capacitive ratio. The propose...

How do neurons in a decision circuit integrate time-varying signals, in favor of or against alternative choice options? To address this question, we used a recurrent neural circuit model to simulate an experiment in which monkeys performed a direction-discrimination task on a visual motion stimulus. In a recent study, it was found that brief pulses of motion perturbed neural activity in the lat...

A macro-model is a simplified model that emulates functional characteristics of a device or circuit, and widely used in system-level simulation. In this paper, macro-model based SPICE simulation of DC/DC switching regulators is presented. Macro-models of a power switch and Pulse Width Modulation (PWM) control circuit are described. Two simulation examples are given to demonstrate the capability...

In order to improve the efficiency(usable RF to total pulse) of a klystron modulator, a system using a solidstate compensation circuit has been developed. This system remarkably improves a flat-top and flatness of the output waveform of the modulator by means of waveform synthesis. This paper presents the design and specifications of the compensation circuit and the results of a preliminary tes...

ii ABSTRACT High-power short electrical pulses are important for high-performance functionality integration, such as the development of microelectromechanical/nanoelectromechanical systems (MEMS/NEMS), system on chip (SoC) and lab on chip (LoC). Many of these applications need high-power (low impedance load) short electrical pulses, in addition to CMOS digital intelligence. Therefore, it is of ...

A high-speed direct-coupled discriminator utilizing emittercoupled integrated circuits is described. The threshold is continuously adjustable between -150 mV and -1.15 V, the pulse pair resolution is 10 nsec, and the maximum continuous repetition rate is 92 MHz. Two modes of operation, clipped and dc , are provided; output widths in the clipped mode are 5 nsec, 10 nsec, or 15 nsec. The use of i...

This article presents a wideband bias circuit with low parasitic inductance for high-power pulsed amplifiers. The proposed works similarly to the traditional in that it can ensure transmission of microwaves from power amplifier load while preventing supply. By making line shorter and wider than circuit, reduces its inductance. reduction parameters is critical reducing drain voltage overshoot pu...

A compact chaos generator core circuit has been designed, fabricated, and tested. It generates PWM and PPM (pulse width and phase modulation) signals that follow arbitrary nonlinear analog dynamics. The measurement results show that PWM/PPM chaotic signals are generated at 1 MHz with a calculation precision of 6.7 bits at a supply voltage of 3.3 V. The circuit can be used for large-scale integr...

An in-circuit diagnostic test structure triggered by a light pulse captures logic states on-chip with picosecond timing accuracy, and the results read out via a scan chain thus providing precise logic transition time information from deep inside the chip, greatly aiding failure analysis. The method could also make time measurement of switching events inside an IC when it is mounted in a printed...

UNLABELLED Circuit dysfunction in complex brain disorders such as schizophrenia and autism is caused by imbalances between inhibitory and excitatory synaptic transmission (I/E). Short-term plasticity differentially alters responses from excitatory and inhibitory synapses, causing the I/E ratio to change as a function of frequency. However, little is known about I/E ratio dynamics in complex bra...