BACKGROUND A novel control system for the EVAHEART left ventricular assist device (LVAD), known as the Native Heart Load Control System (NHLCS), can change the device's rotational speed (RS) in synchrony with the heartbeat. The system enhanced coronary flow (CoF) with the counter-pulse mode in normal goats' hearts, so we examined the change in CoF in goats with acute ischemic heart failure (HF)...

Synapses are crucial elements for computation and information transfer in both real and artificial neural systems. Recent experimental findings and theoretical models of pulse-based neural networks suggest that synaptic dynamics can play a crucial role for learning neural codes and encoding spatiotemporal spike patterns. Within the context of hardware implementations of pulse-based neural netwo...

This paper presents a three-phase 12-pulse phasecontrolled rectifier with unity displacement factor, low line current harmonic content, two quadrant operation and absence of phase shifting transformer. The circuit is composed by two three-phase 6-pulse rectifiers parallel connected by four balancing reactors. One is a conventional thyristor rectifier with a lag firing angle (a). The other is an...

This paper proposes a novel single-input sampling instance control circuit used in primary-side controller of Switch Mode Power Supplies (SMPS) without optical-coupler and secondary feedback control circuit. The novel control circuit is based on the idea determining the sampling instance of current switching cycle by the duration of the voltage pulse at the auxiliary wingding during the previou...

We present a simple electronic circuit that produces negative delays. When a pulse is sent to the circuit as input, the output is a pulse with a similar wave form that is shifted forward in time. The advance time or negative delay can be increased to the order of seconds so that we can observe the advance with the naked eye by observing two light emitting diodes that are connected to the input ...

Abstrac t This paper describes a method for restraining electromagnetic interference received by reference meter clearly not caused by watt-hour meter under test by means of pulse width testing circuit. The method is adopted to resolve the problems often occurred in the type tests of watt-hour meters. During the EMC test of watt-hour meters, the tester can’t confirm the additional error due to ...

The design of a universal waveform generator derived from displaying driving applications using floating power and Miller integrator circuit is introduced first. Then, the feasibility of driving ultrasound transducers is verified by the test of the circuit and compared with other specific design of pulse generator for ultrasound driving purpose.

Practically, clocking system like flip-flop (FF) consumes large portion of total chip power. In this paper, a novel low-power pulse-triggered flip-flop (FF) design is presented. Pulsetriggered FF (P-FF) has been considered as a popular alternative to the conventional master –slave based FF in the applications of high speed. First, a simple two-transistor AND gate design is used to reduce the ci...

This paper proposes an RF signal generator using a time domain harmonic suppression technique based on Fourier series analysis. The circuit consists of four differential ring voltage control oscillators (VCO’s) with phase differences and the pulse signal summing circuit. By summing pulse signals from VCO’s with appropriate phase differences determined by Fourier series in time domain, the third...

The objective of this work was to develop a prototype for a pulse oximeter. Given the necessity, in most medical interventions, to monitorize Oxygen saturation in peripheral blood (SpO2) a pulse oximeter is highly necessary in any operating room or intensive care unit. The electronic device was built recurring mostly to Integrated Circuit (IC) and its control was performed via a programmed micr...