GALVANIC ISOLATION CIRCUIT AND SYSTEM AND A CORRESPONDING METHOD OF OPERATION

• Main Authors: RAGONESE EGIDIO, SPINA NUNZIO, GRECO NUNZIO, PARISI ALESSANDRO, PALMISANO GIUSEPPE
• Format: Patent
• Language: Chinese; English
• Published: 18.10.2019
• Subjects: AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; PULSE TECHNIQUE

The disclosure relates to a galvanic isolation circuit and system and a corresponding method of operation. An oscillator is coupled to a first side of a galvanic barrier for supplying thereto an electric supply signal. The oscillator is configured to be alternatively turned on and off as a function of a PWM drive signal applied thereto. A receiver circuit coupled to the galvanic barrier receives therefrom a PWM power control signal. A signal reconstruction circuit coupled between the receiver circuit block and the oscillator provides to the oscillator a PWM drive signal reconstructed from thePWM power control signal. The signal reconstruction circuit includes a PLL circuit coupled to the receiver circuit block and configured to lock to the PWM control signal from the receiver circuit block. A PLL loop within the PLL circuit is sensitive to the PWM drive signal applied to the oscillator. The PLL loop is configured to be opened as a result of the power supply oscillator being turned off. 本公开涉及一种流电隔离电路和系统以及对应的操作