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A switched-capacitor circuit is proposed for the generation of noise resembling the typical noise spectral density of MOS devices. The circuit is based on the combination of two chaotic maps, one generating 1/f noise (hopping map) and the other generating white noise (Bernoulli map). Through a programmable weighted adder stage, the contribution of each map can be controlled and, thereby, the position...
This paper introduces the design of a Marx Generator that can generate high attitude pulses up to 25 kV and 2.5 kA. The pulses have a wave shape representative of that used to test High-altitude ElectroMagnetic (HEMP) filters against the pulse current injection (PCI) requirements. The rise time is 20 ns and the pulse width is 230 ns on a 10 Ω resistor. In the design, it was found that parasitic effect...
As electronic circuits get smaller and become less power hungry, small amounts of energy in our surroundings can be used to power them up. For bio-implantable and wearable devices it is possible to extract energy from body movements. Until now, three main transducers have been introduced for energy scavenging purposes, i.e. piezoelectric, electromagnetic and electrostatic. In electrostatic method...
Using effective and harmless methods to remove contaminants from the environment and water resources have been considered by many researchers. Among the modern methods, corona discharge for creating free radicals and ozone, which is a strong and unstable pollution treatment, is the best method. The corona discharge is created by applying narrow high-voltage pulses by pulsed power generators on two...
A full wave field-circuit co-simulation method is employed to characterise the time domain behaviour of the Marx generator. Radiation and conduction effects are fully considered. Results from the co-simulation and the circuit simulation are compared; it can be found that the field-circuit co-simulation provides complete information of the system which includes the radiation effect and the mutual coupling...
Batteries drawbacks are represented by the high cost, the limited reliability and the frequent maintenance requirements (recharge or replacement). Energy Harvesting (EH) offers an alternative to batteries replacement or, at least it allows the increase of their lifetime. EH is the conversion of ambient energy, which is present in the environment, into electrical energy. Different energy sources for...
A study on two new circuits to generate square/triangular waveforms are presented. Circuit-I consists of a CCII, a capacitor, an OTA and a voltage divider network. The frequency can be changed by changing the voltage division ratio or the time-constant and amplitude by a combination thereof. As an extension of this concept, in the proposed circuit-II a CCCII is used in place of CCII to get electronic...
The paper introduced the work principle of the 10/350µs impulse current generation and analyzed the feature of the crowbar trigger circuit. Crowbar trigger circuit with 10/350µs impulse current and follow current of voltage switching type surge protective device (SPD) has been researched using EMTP simulation. In order to simulate voltage switching type SPD, the equivalent impedance of the sample...
This paper design a SRD-based wide-band comb generator. The parameters of a wide-band, short impulse generator circuit are analyzed through designing the generator circuit with output spectrum from 0.5 GHz to 50 GHz, and the results gain nice validation by experiment. The implemented wide-band comb has been applied in receiver and spectrum analyzer.
In Hybrid Electric Vehicles (HEV), one of the most important phenomenon which has effect on the vehicle performance is certainly quality of power and power flow in the system. A good power quality in the system can be provided by decreased fluctuation in power flow and a longer life-time of the battery utilized in the electric subsystem of the vehicle. In this paper, we utilize a parallel-series type...
This paper presents a study for determining the maximum amount of PV solar generation that can be connected in a 27.6 kV feeder of a distribution utility - London Hydro. Various factors such as steady state voltage rise, Temporary Over Voltage (TOV), short circuit current and harmonic contributions, that could potentially constrain DG connectivity are investigated. Load flow studies with PSS/E and...
In this paper, we present a MOSFET-based Colpitts oscillator based on a “zero-threshold” transistor operating at a supply voltage below 20 mV. The circuit was carefully analyzed and expressions relating the start-up conditions and the voltage supply, as well as the oscillation frequency were developed. Measurement results obtained on a discrete prototype confirmed the low-voltage operation of the...
Pulse electric field (PEF) is an important technique in food treatment to inactivate microorganism. This PEF is an alternative method from conventional thermal methods in food sterilization industry. The role of PEF is to maintain the foods flavor for a small difference range of temperature to find fresh quality of nutritious foods. The new topology for power electronics converter with Marx configuration...
This paper describes a synapse circuit that approximately implements the dynamics of the dopamine (DA) modulated synapse proposed by Izhikevich (2007). The dynamics of the model, based on ‘eligibility traces’ generated according to a spike-timing-dependent plasticity (STDP) rule, ensure that causal pre-/post- synaptic spiking activity in the time preceding the reward, signaled by DA, leads to strengthening...
Various applications in the modern world require DC supply. Some applications needs low DC voltage and some require considerably high DC voltage. We get AC supply and that needs to be converted to DC for these applications. In this paper AC - DC step up and step down converters without the use of bridge rectification is dealt. In step up converter, low AC voltage micro generators are used and the...
A multioutput current-controlled current conveyor (MOCCCII)-based function generator is proposed, which provides a mixed-mode sinusoidal four-phase quadrature outputs, square and triangular voltage outputs simultaneously. The starting building block of the proposed function generator is a single output current-controlled current conveyor (CCCII)-based voltage-mode sinusoidal quadrature oscillator...
The paper presents a peak detect and hold circuit for nuclear radiation pulse amplitude measurement. The design is to use two ramps with different slopes to sample the input voltage to avoid overshoot during sampling stage. The holding capacitor connected to input instead of charging source to avoid pedestal voltage error. Simulation result indicates that measuring voltage error is less than 0.1%...
This paper presents the architecture of a novel implementation of an integrated self-powered system based on piezoelectric vibrations in a 0.13 mum technology. The electromechanical transduction is performed by using a low-cost commercial piezoelectric, working at low frequencies, with voltages up to 2.5 V. The system is conceived as a System In a Package (SiP). The full integrated system is adapted...
The UNM educational reltron is driven by a 2 stage bipolar 396 J Marx generator capable of generating a maximum of 120 kV. The output voltage pulse has a rise time of less than 0.25 ??s and a variable pulse width of 1-4 ??s. The pulse width is controlled by a crowbar switch that shunts current away from the load. An analytic model of the Marx generator's charging and discharging is developed. The...
A new charge pump circuit with a clock that shows an increased clock voltage as its stage is increased is proposed in the paper. The charge pump circuit utilizes the cross-connected NMOS, voltage doubler, as a pumping stage. Each stage of the voltage-doubler provides a pair of complementary clock voltages. The clock voltage also increases as the stage of voltage doubler is increased. It shows that...
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