By de Vries I.D.
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Additional info for High power and high frequency class-DE inverters
3. The output capacitance and the power dissipated by the current source, limit the frequency and voltage it can feasibly work at. A better solution, that decreases the amount of power dissipated, is to use a pulsed current source, which is then latched on the receiving side. Current Pulsed circuits are based on the following two topologies; Dual Current Pulsed Latch This topology employs two pulsed current sources. One pulsed current is used to set a flip-flop, which turns on the switch, the other is used to reset the flip-flop, which turns off the switch.
The layout options are limited because of the close proximity of the input to the output. 4. The LED is current driven by the drive signal. The light emitted from the LED is sent down a length of fiber optic cable to the receiver. The receiver converts the received optical signal into an analog output voltage. The receiver consists of a PIN photodiode and a transimpedance amplifier. The output voltage of the amplifier is then level detected by a comparator and converted into logic signal. 4 Comparator Fiber Optic Communication-link The galvanic isolation and dv/dt rating of this communication-link can be increased to almost any desired value by simply lengthening the fiber optic cable.
3 L1 PSpice Schematic of the Class-D inverter R-load Chapter 3. 8 A Power Dissipated Per MOSFET = 500W Simulation Waveforms and Results of the Class-D inverter 30 Chapter 3. Topology, Switching Devices and Simulation 31 The series resonant capacitance of LCR load network was selected to be 1nF and the inductance found accordingly. 9 ohms. The dead-time between switching transitions must be selected by the designer and for this simulation it was chosen to be 10% of the period (20ns). 4. 4 shows the midpoint voltage, V(M1:s), and the load current, I(L1), as indicated by the voltage and current markers on the circuit diagram.