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This paper presents experimental results of a power factor corrector (PFC) with the average current control. Nowadays, we need a power factor corrector for most switch mode power supplies. Usually, a boost corrector with the average current control is used. The average current control offers good noise immunity, small input ripple and stability. Main paper goal was explaining average current shaping...
A 2.2-ppm/°C voltage reference is proposed for use as an analog to digital conversion reference in readout application-specific integrated circuits. The proposed circuit uses resistors available for the standard CMOS process with opposite sign temperature coefficients. That enables a superposition of two bandgap schemes, one with downward concave and the other upward concave voltage temperature dependence...
This paper presents a high spectral quality voltage-controlled sinusoidal quadrature oscillator. The amplitude stabilization of the output signal is based on energy approach. Described voltage-controlled oscillator has potential applications phase locked loops in modulation, detection etc. Most of the sinusoidal oscillators available in open literature are suffering with same problem. The amplitude...
A new device for measuring the electrospinning process was developed. The device is suitable for measuring an electrospinning process of various setups, meaning different electrodes, voltages and solutions. The device can be used as an oscillograph to show the present signal or as an autonomous control device. The device is robust to damage by high voltage.
DC suppression consists of a mandatory procedure in several measurement applications. In many situations, its value is orders of magnitude above the desired information to be measured. In fully-differential instrumentation amplifiers, which present a very high common-mode rejection ratio, matched coupling capacitors are demanded for CMRR not to degrade. Stability problems can arise if active cancellation...
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