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Simple low power circuit for bioimpedance tracking on different frequencies is purposed in this paper. Using ADC and digital signal processing is intentionally avoided to reduce power consuming and processing power required. Instead only analog comparators and digital timers are used to determine signal phase, amplitude and calculate impedance with noise correction. Programmable system on chip (PSoC)...
This paper presents performance comparison of High-voltage High-frequency Ozone Generator using PWM and Phase-Shifted PWM full-bridge inverter as a power supply. The circuits operations of the inverter are fully described. In order to ensure that zero voltage switching (ZVS) mode always operated over a certain range of a frequency variation, a series-compensated resonant inductor is included. The...
This paper proposes the measurement of an ozone generator using a phase-shifted pulse width modulation (PWM) full bridge inverter as a power supply. The method of electrode parameter measurement for an ozone generator is presented. An electrode set is represented by an equivalent circuit by parallel capacitor and resistor. The test was performed with high-frequency high-voltage ac power supply. Then...
This paper proposes an ozone generator using a phase shift PWM full bridge inverter. The advantage of the proposed system is capable of varying ozone gas level by varying frequency of the converter whilst the output voltage is kept to be constant. In order to obtain such condition, the pulse width of the output voltage is varied. The gate signals are controlled by a microcontroller. The performance...
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